Tel: (800) 832-3873 Email: [email protected] www.littelfuse.com/SE-330
SE-330 MANUAL NEUTRAL-GROUNDING-RESISTOR MONITOR REVISION 11-A-063018
Copyright © 2018 by Littelfuse All rights reserved.
Document Number: PM-1200-EN Page i SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
This page intentionally left blank. Page ii SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
TABLE OF CONTENTS 7 ORDERING INFORMATION...... 34
1 GENERAL ...... 1 8 WARRANTY...... 35 1.1 Modern Resistance-Grounded Systems...... 1 1.2 SE-330 NGR Monitoring...... 1 9 TEST PROCEDURES...... 35 1.3 NGR Short Detection...... 2 9.1 Resistor-Fault Tests...... 35 9.1.1 Calibration and Open Test...... 35 2 OPERATION...... 2 9.1.2 Voltage Test...... 35 2.1 Settings...... 2 9.2 Sensing-Resistor Test...... 35 2.1.1 GF Trip Time...... 2 9.3 Analog-Output Test...... 36 2.1.2 GF Trip Level...... 2 9.4 Ground-Fault Performance Test...... 36
2.1.3 VN Trip Level...... 2 2.1.4 Pulse-Period Adjustment...... 3 APPENDIX A SE-330 REVISION HISTORY...... 37 2.1.5 Configuration Settings...... 4 2.1.5.1 Relay K1 Function (S1)...... 4 2.1.5.2 Trip-Relay Mode and Trip-Memory Mode (S2)...... 4 LIST OF FIGURES 2.1.5.3 Ground-Fault-Trip Latch (S3)...... 4 2.1.5.4 Resistor-Fault-Trip Latch (S4)...... 4 1 Configuration switches...... 4 2.1.5.5 Sensing-Resistor Selection (S5)...... 4 2 Analog-output connections...... 6 2.1.5.6 Frequency (S6)...... 4 3 SE-330 connection diagram...... 7 2.1.5.7 Upgrade Mode (S8) ...... 4 4 SE-330 outline and panel-mounting details...... 8 2.1.6 Resistor-Fault Trip Time...... 4 5 SE-330 outline and surface-mounting details...... 9 2.1.7 Resistor-Fault Trip Level ...... 4 6 SE-IP65CVR-G weatherproof cover outline...... 10 2.1.8 Geo-Magnetic Filter...... 4 7 SE-IP65CVR-G weatherproof cover installation...... 11 2.2 Calibration...... 5 8 ER-600VC sensing resistor...... 12 2.3 Pulsing Operation...... 5 9 SE-MRE-600 moisture-resistant enclosure outline...... 13 2.4 Trip Indication and Reset...... 5 10 ER-600VC installed in SE-MRE-600...... 14 2.5 Remote Operation...... 5 11 ER-5KV sensing resistor...... 15 2.6 Relay K1 LED...... 6 12 ER-5WP sensing resistor...... 16 2.7 Unit Healthy Output...... 6 13 ER-15KV sensing resistor...... 17 2.8 Diagnostic LED...... 6 14 ER-25KV sensing resistor...... 18 2.9 Enhanced Health Status...... 6 15 ER-35KV sensing resistor...... 19 2.10 Analog Output...... 6 16 ELCT5-88 and ELCT30-88 ground-fault current sensors..... 21 17 ELCT5-31 and ELCT30-31 ground-fault current sensors..... 22 3 INSTALLATION ...... 6 18 RK-332 remote indication and reset...... 23 3.1 SE-330...... 6 19 PGA-0520 analog percent current meter...... 23 3.2 Sensing Resistor...... 12 20 Simplified isolated-ground connection...... 24 3.3 Ground-Fault CT...... 20 21 Simplified pulsing connection...... 24 3.4 Isolated Ground Connection...... 24 22 Ground-fault test circuits...... 36 3.5 Pulsing Connection...... 24 LIST OF TABLES 4 DATA INTERFACES...... 25 4.1 SD Card...... 25 1 Typical tripping system values...... 3 4.1.1 Datalogging...... 25 2 Ground-fault trip levels for selected CTs...... 3 4.1.2 Firmware Upgrade...... 25 3 Ground-fault-test record...... 36 4.2 USB Interface...... 25 4.3 Network Communications...... 26
5 TROUBLESHOOTING...... 27 DISCLAIMER Specifications are subject to change without notice. Littelfuse, Inc. is not liable for contingent or consequential damages or for 6 TECHNICAL SPECIFICATIONS...... 29 expenses sustained as result of incorrect application, incorrect 6.1 SE-330...... 29 adjustment, or malfunction. 6.2 Sensing Resistors...... 31 6.3 Current Sensors...... 32 Page iii SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
This page intentionally left blank. Page 1 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
1. GENERAL • A transformer can provide the inductance necessary to cause 1.1 Modern Resistance-Grounded Systems ferroresonance if the NGR opens. A high-resistance-grounded system uses a neutral-grounding Following these guidelines will reduce the flash hazard, reduce resistor (NGR) with a low let-through current to limit the ground- point-of-fault damage, achieve reliable ground-fault protection, and fault current. This is an improvement from low-resistance and ensure a stable system not subject to ferroresonance. solidly grounded systems, which do not use NGRs and therefore have a ground-fault flash hazard that can cause substantial point- 1.2 SE-330 NGR Monitoring of-fault damage. High-resistance grounding eliminates these The SE-330 is a microprocessor-based NGR monitor that detects problems. Modern ground-fault protection reliably operates at low NGR failures and ground faults in resistance-grounded systems and current levels. Furthermore, the probability of an arc-flash incident is compliant with the 2018 CE Code. The SE-330 measures NGR is significantly reduced in high-resistance-grounded systems. resistance, NGR current, and transformer or generator neutral-to- NGR selection depends on system charging current and whether ground voltage. The components required to monitor an NGR are the system is an alarm-only or a tripping system. Alarm-only an SE-330, a 20- or 100-kΩ ER-series sensing resistor, and a current systems are usually restricted to system voltages up to 5 kV with transformer (CT). NGR let-through currents of 5 A or less. Occasionally, alarm-only Power-circuit elements (other than neutral-connected NGRs) systems up to 15 kV and 10 A are used, however, these systems that purposefully connect the power system to ground are often are not common because a ground fault on such a system tends not compatible with SE-330 NGR monitoring. These elements to escalate to a phase-to-phase fault before the ground fault can include single-phase grounding transformers, grounded-wye- be located and cleared. Consult Canadian Electrical (CE) Code rule primary potential transformers, and grounded-wye-primary power 10-302, National Electric Code (NEC)* 250.36, and NEC 250.186 for transformers. application details. The SE-330 continuously measures NGR resistance in an System charging current is the capacitive current that flows unfaulted system. It will trip on resistor fault if the NGR resistance to ground when a bolted ground fault occurs. This current can varies from its calibrated value. When a ground fault occurs, voltage be calculated or measured. For small systems, the magnitude of is present on the neutral. NGR current will flow if the NGR is healthy. charging current may be conservatively estimated as ½ A per 1,000 The SE-330 will trip on ground fault if fault current exceeds the GF kVA in low-voltage systems and 1 A per 1,000 kVA in medium- TRIP LEVEL setting for an interval equal to the GF TRIP TIME setting. voltage systems. However, if the NGR fails open during a ground fault, it is possible In an alarm-only system or in a tripping system without selective for fault resistance to satisfy the NGR resistance measurement. To coordination, use an NGR with a let-through current larger than the detect this double-fault condition, the SE-330 measures neutral system charging current. Set the pick-up current of ground-fault voltage. If neutral voltage exceeds the VN TRIP LEVEL setting and if devices at or below 50% of the NGR let-through current. NGR current is less than 5% of the CT rating, the SE-330 will trip on resistor fault. If the resistor-fault circuit is tripped and the neutral In a tripping system with selective coordination, use ground-fault voltage exceeds the VN TRIP LEVEL setting for an interval greater devices that have a definite-time characteristic to achieve time than the GF TRIP TIME setting, the ground-fault circuit will also trip. coordination. Use the same pick-up current for all ground-fault devices, which must be a larger value than the charging current Ground-fault current is sensed by a CT with a 1- or 5-A secondary, of the largest feeder. Select an NGR with a let-through current or by a CT (ELCT5-x or ELCT30-x) with a 50-mA secondary. The trip between five and 10 times the pick-up current of the ground-fault level of the ground-fault circuit is adjustable from 2 to 100% of the devices. CT rating. The trip time is adjustable from 0.1 to 10.0 seconds. Do not use a grounding transformer with a low-voltage resistor: The SE-330 has four output relays. With firmware version 3.00 or higher, relays K1, K2, and K3 can be assigned to one of the following • The combined cost of a transformer and a low-voltage resistor functions (using SE-MON330 version 4.0 or higher): is more than the cost of a resistor that is rated for line-to- neutral voltage. • Ground Fault (GF); • A transformer saturated by a ground fault through a rectifier • Resistor Fault (RF); can make ground-fault protection inoperative. • Enhanced Health Status (HEALTH); • Transformer inrush current up to 12 times the rated current can • GF + RF; cause a voltage that is larger than expected. • GF + RF + HEALTH; or • A parallel transformer winding makes it difficult to monitor NGR continuity. • DISABLED. Page 2 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
In addition to the selected function, K1 is also assigned a trip or is not detected. A trip will eventually occur when the time for fault pulsing function. When the pulsing function is selected, relay K1 current above the trip level is greater than the time for fault current is used to control a contactor to assist in locating faults. Relays below the trip level. K1, K2, and K3 can be set to operate in the fail-safe or non-fail- A non-accumulating mode can also be selected. In this mode, a safe mode for undervoltage or shunt-trip applications. Relay K4 is a trip occurs if the fault current remains higher than the ground-fault solid-state relay that provides basic UNIT HEALTH indication. trip level for the duration of the ground-fault trip time. Additional features include LED trip indication, trip memory, front-panel and remote reset, 4-20-mA analog output, trip event 2.1.2 GF Trip Level recorder, USB local communications, microSD* data logging, and optional network communications. The SE-330 uses a Discrete-Fourier Transform (DFT) algorithm to measure the fundamental component of NGR current. The SE-330 provides additional features over the SE-330 legacy model (revision 04 or less): Choose an NGR let-through current and a ground-fault trip level using the guidelines in Section 1.1. Set the ground-fault • NGR short detection capability. trip level between 2 and 100% of the CT-primary rating. When • Configurable output relay function and operating mode (K1, the ground-fault trip level is set to MEM, the ground-fault setting K2, and K3). that is stored in non-volatile memory is used. This parameter must be set using a PC running the SE-MON330 software and • When the trip level is set to MEM, the ground-fault trip setting connected to the USB interface. The setting range is 2 to 100% is defined by an internal non-volatile memory variable. The of CT primary rating in 1% increments. The default value is 15%. range is 2 to 100% in 1% increments of the CT-primary rating. Inputs are provided for 5-, 1-, and 0.05-A secondary CTs. Typical • The number of trip records has been increased to 100 and values for 5-, 15-, and 25-A tripping systems are shown in Table 1. includes date and time stamping. Ground-fault trip levels for the selected CTs are shown in Table 2. For other systems, refer to the NGR Monitor Set-Point Assistant • A microSD card interface can be used for short-term data at www.littelfuse.com/relayscontrols. The Set-Point Assistant is logging and firmware updates. A microSD card is included. included with the SE-MON330 software. See Section 4.1. • For ease of connection to new devices, the RS-232 interface has been replaced by a Mini-B USB port. 2.1.3 VN Trip Level • Dual Ethernet ports are available with support for fiber-optic The SE-330 uses a DFT algorithm to measure the fundamental component of neutral voltage (V ). and RJ45 interfaces. N • An added IEC61850 protocol. The SE-330 will trip and indicate a resistor fault if neutral voltage is greater than the VN TRIP LEVEL setting for the duration of the resistor-fault trip time, and ground-fault current is less than 5% of 1.3 NGR Short Detection (firmware version 3.00 and higher) the CT rating. If the resistor-fault circuit is tripped and the neutral voltage exceeds the V TRIP LEVEL setting for an interval greater The SE-330 can be configured to monitor and trip if the NGR N resistance decreases to a value less than 10 to 70% of the Nominal than the GF TRIP TIME setting then the ground-fault circuit will NGR Resistance value. The Nominal NGR Resistance, NGR Short also trip. Trip Level, and several other values can be configured usingSE- The VN TRIP LEVEL range is 20 to 2,000 V when switch S5 is in the MON330 (version 4.0 or higher). Refer to the SE-MON330 manual 20-kΩ (Vx1) position, and the range is 100 to 10,000 V when switch for further details. S5 is in the 100-kΩ (Vx5) position. Calculate the voltage across the NGR when the NGR current is equal to the pick-up current of the ground-fault circuit. Set the V TRIP LEVEL to the next largest value. 2. OPERATION N 2.1 Settings See Fig. 1 and Section 2.1.5.5. 2.1.1 GF Trip Time Typical values for 5- 15-, and 25-A tripping systems are shown GF TRIP TIME (definite time) is adjustable from 0.1 to 10.0 in Table 1. For an NGR resistance greater than 2 kΩ, use a 100-kΩ seconds. Time-coordinated ground-fault protection requires this sensing resistor. For other systems, refer to the NGR Monitor Set- setting to be longer than the trip times of downstream ground-fault Point Assistant at www.littelfuse.com/relayscontrols. devices. NOTE: A resistor-fault trip is inhibited if the ground-fault current is A trip-time accumulator provides a ground-fault memory function above 5% of the CT rating. for detection of intermittent faults. The accumulated time increases when a ground fault is detected and decreases when a ground fault Page 3 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
TABLE 1. Typical tripping system values
SYSTEM NEUTRAL-GROUNDING GROUND-FAULT VOLTAGE SENSING RESISTOR VN TRIP LEVEL (LINE-TO-LINE) RESISTOR TRIP LEVEL RESISTANCE (VOLTS) CURRENT RESISTANCE MODEL (SWITCH S5 (AMPERES) (VOLTS) (AMPERES) (OHMS) SETTING) 480 5 55 ER-600VC 20 kΩ 1.0 60 600 5 69 ER-600VC 20 kΩ 1.0 100 2,400 5 277 ER-5KV 20 kΩ 1.0 340 4,160 5 480 ER-5KV 20 kΩ 1.0 800 480 15 18 ER-600VC 20 kΩ 3.0 60 600 15 23 ER-600VC 20 kΩ 3.0 100 2,400 15 92 ER-5KV 20 kΩ 3.0 340 4,160 15 160 ER-5KV 20 kΩ 3.0 800 7,200 15 277 ER-15KV 100 kΩ 3.0 170x5 = 850 14,400 15 554 ER-15KV 100 kΩ 3.0 340x5 = 1,700 4,160 25 96 ER-5KV 20 kΩ 5.0 800 7,200 25 166 ER-15KV 100 kΩ 5.0 170x5 = 850 14,400 25 332 ER-15KV 100 kΩ 5.0 340x5 = 1,700 25,000 25 577 ER-25KV 100 kΩ 5.0 800x5 = 4,000 35,000 25 808 ER-35KV 100 kΩ 5.0 1,200x5 = 6,000
TABLE 2. Ground-fault trip levels for selected CTs ELCT5-x ELCT30-x 50:1 100:1 200:1 400:1 GF TRIP EFCT-x SE-CS30-x 50:5 100:5 200:5 400:5 LEVEL(%)(1) 5:0.05 30:0.05 (AMPERES) (AMPERES) (AMPERES) (AMPERES) (AMPERES) (AMPERES) 2 0.10 0.60 * * * * 4 0.20 1.20 * * * 16 6 0.30 1.80 * * 12 24 8 0.40 2.40 * 8 16 36 10 0.50 3.00 5 10 20 40 20 1.00 6.00 10 20 40 80 40 2.00 12.00 20 40 80 160 60 3.00 18.00 30 60 120 240 80 4.00 24.00 40 80 160 320 100 5.00 30.00 50 100 200 400 (1) When set to MEM, range is 2 to 100% in 1% increments. * Setting not recommended. 2.1.4 Pulse-Period Adjustment See Section 2.3 for detailed pulsing operation information. Pulse period is the cycle time of relay K1 when the SE-330 is NOTE: For pulsing configuration, set switch S1 to K1 = PULSING configured for pulsing operation. Pulse period is adjustable from 1.0 and install an external pulse-enable switch. to 3.0 seconds with a fixed duty cycle of 50 percent. For example, with the 1.0-s setting, relay K1 will be energized for 0.5 seconds and de-energized for 0.5 seconds when pulsing is enabled. Page 4 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
2.1.5 Configuration Settings 2.1.5.3 Ground-Fault-Trip Latch (S3) Eight configuration switches (S1 to S8) and a calibration button Set switch S3 to select latching or non-latching ground-fault- are located behind the access cover on the front panel. See Fig. 1. circuit operation. Non-latching operation overrides ground-fault-trip memory. See Sections 2.1.5.2 and 2.4.
CALIBRATION BUTTON 2.1.5.4 Resistor-Fault-Trip Latch (S4) Set switch S4 to select latching or non-latching resistor-fault- K1 = TRIP S1 K1 = PULSING circuit operation. Non-latching operation overrides resistor-fault- K1 FAIL-SAFE S2 K1 NON-FAIL-SAFE trip memory. See Sections 2.1.5.2 and 2.4. LATCHING GF TRIP S3 NON-LATCHING GF TRIP 2.1.5.5 Sensing-Resistor Selection (S5) LATCHING RF TRIP S4 NON-LATCHING RF TRIP 20 kΩ S5 100 kΩ Set switch S5 to the resistance of the sensing resistor. For the 50 Hz S6 60 Hz ER-600VC, ER-5KV, and ER-5WP, select 20 kΩ. For the ER-15KV, ER- NOT USED S7 25KV, and ER-35KV, select 100 kΩ. Switch S5 sets the resistor-fault
RUN S8 UPGRADE trip value and the VN TRIP LEVEL range. See Section 2.1.3.
2.1.5.6 Frequency (S6)
NOTE: Set switch S6 to 50 or 60 Hz to tune the digital filter to the line frequency of the monitored system. 1. DEFAULT SETTINGS SHOWN. 2.1.5.7 Upgrade Mode (S8) FIG. 1. Configuration switches. The microSD card is used for firmware upgrades. See Section 4.1.2 for upgrade instructions. 2.1.5.1 Relay K1 Function (S1) NOTE: An upgrade causes an SE-330 restart and this may cycle the Set switch S1 to K1 = TRIP to assign the trip function to relay K1 output relays. and to activate switch S2. With the default setting, relay K1 will change state when a resistor-fault or ground-fault trip occurs. Other 2.1.6 Resistor-Fault Trip Time trip functions can be assigned to K1 using SE-MON330 software or via network communications. The resistor-fault trip time can be adjusted from from 12 seconds (the default) to as much as 60 seconds using the SE-MON330 Set switch S1 to K1 = PULSING to configure relay K1 for pulsing software or via network communications. operation. See Section 2.3. 2.1.7 Resistor-Fault Trip Level 2.1.5.2 Trip-Relay Mode And Trip-Memory Mode (S2) The resistor-fault trip level can be adjusted using the SE-MON330 Set switch S2 to select the operating mode of trip relay K1. In the software or via network communications. See Section 6.1. non-fail-safe mode, relay K1 energizes and its contact closes when a trip occurs. The non-fail-safe mode can be used to trip shunt-trip 2.1.8 Geo-Magnetic Filter circuit breakers. In the non-fail-safe mode, SE-330 trips are reset when supply voltage is cycled. A low-frequency ground current can be caused by the Earth’s magnetic field and from charged clouds passing overhead during In the fail-safe mode, relay K1 energizes and its contact will a thunderstorm. In some conditions, this can cause a false resistor- close if there are no trips. The contact will open in the event of a fault trip. Enabling the geo-magnetic filter and increasing the trip, a loss of supply voltage, or a processor failure. In the fail-safe resistor-fault trip time can help counteract these effects. mode, SE-330 trips are not reset when the supply voltage is cycled. A trip time of 30 seconds is recommended when the NOTE: Switch S2 does not affect the operating modes of relays geo-magnetic filter is enabled. K2, K3, and K4. The geo-magnetic filter is disabled by default but can be enabled using the SE-MON330 software or via network communications. NOTE: Switch S2 only affects relay K1 operating mode when K1 is assigned the trip function (switch S1 set to K1 = TRIP). Trip memory is enabled when K1 is set to the fail-safe mode, regardless of the switch S1 setting. Page 5 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
2.2 Calibration 2.4 Trip Indication And Reset The SE-330 measures the resistance change of the NGR Red LEDs and indication relays indicate ground-fault and relative to the NGR-resistance value that was determined at the resistor-fault trips. The indication relays K2 (default is GF) and K3 time of calibration. When the resistance change is greater than (default is RF) operate in either fail-safe or non-fail-safe mode. The the threshold amount (500 Ω for 20-kΩ systems and 2,500 Ω for default is non-fail-safe mode. In this mode, the relays are energized 100-kΩ systems), a resistor-fault trip will occur. The SE-330 should when a fault occurs. The relay mode setting is stored in non-volatile be calibrated for new installations, or if the NGR or the sensing memory and can be set using the SE-MON330 software or network resistor is changed. communications. NOTE: If the SE-330 is not calibrated and is supplied from the load When a trip occurs with latching operation selected, the side of the breaker (non-fail-safe mode), calibrate it within the SE-330 remains tripped until the unit is reset with the front-panel resistor-fault trip time after power-up or it may trip and interrupt its RESET button or the remote-reset input. See Sections 2.1.5.3 and supply. See Section 2.1.6. 2.1.5.4. Terminals 15 and 16 are provided for remote reset as shown in Fig. 3. The reset circuit responds only to a momentary The CALIBRATION button is located behind the access cover on closure so that a jammed or shorted button does not prevent a trip. the front panel, and is recessed to prevent inadvertent activation. The front-panel RESET button is inoperative when terminal 15 is NOTE: Calibration must be performed with the SE-330 connected connected to terminal 16. If non-latching operation is selected, trips to the sensing resistor and NGR of the installed system. and corresponding indication will automatically reset when the fault clears. In addition, the power-up trip memory will be ignored To calibrate the SE-330, press and hold the CALIBRATION even when configuration switch S2 is set to fail-safe. The maximum button until the green CALIBRATED LED turns off and then turns automatic reset time is 2.8 s. on (if the LED is already off, press and hold down the button until the LED turns on). Calibration takes approximately two seconds. The red DIAGNOSTIC LED annunciates latched calibration-error If calibration is not successful a resistor-fault trip occurs, the and remote trips. See Section 2.8. RESISTOR FAULT TRIP LED will be on, the CALIBRATED LED will be When supply voltage is applied with switch S2 set to off, and the DIAGNOSTIC LED will flash the calibration-error code. FAIL-SAFE, then the SE-330 returns to its state prior to loss of See Section 2.8. supply voltage unless switch S3 or S4 is set to non-latching. SE-330 The SE-330 may be calibrated remotely using the SE-MON330 trips reset when the supply voltage is applied with switch S2 set to software with the USB interface or the communications options. NON-FAIL-SAFE. When a local, remote, or network reset is issued, both trip LEDs will flash if they are off. If the resistor fault (switch S4) is selected, the calibration-error code flashes until RESET is pressed even if the CALIBRATED LED is Resistor-fault-trip reset can take up to one second. on. Resistor-fault trip-memory trip can take up to three seconds once the relay powers up. The calibration value is stored in non-volatile memory. 2.5 Remote Operation 2.3 Pulsing Operation Relays K2 and K3 can be used for remote indication, and terminals If switch S1 is set to K1 = PULSING, pulsing occurs when terminal 15 and 16 are provided for remote reset. RK-332 Remote Indication 16 is connected to terminal 17. Relay K1 operates at a 50% duty and Reset components are shown in Fig. 18. Connect them as cycle. The duration of each cycle can be adjusted from 1.0 to 3.0 shown in Fig. 3. RK-332 components are not polarity sensitive. seconds. When terminals 16 and 17 are not connected, K1 is not energized and its contact is open. Indication relays can be set to fail-safe or non-fail-safe operation using the SE-MON330 software or network communications. The Relay K1 can be used to control a contactor that is rated for use default mode is non-fail-safe. In non-fail-safe mode, relays energize at the line-to-neutral voltage. The contactor causes changes in on fault. neutral-to-ground resistance by adding or shorting portions of the NGR. See Section 3.5. Pulsing ground-fault current appears as zero- Network-enabled SE-330s can be remotely tripped and reset by sequence current upstream from the fault. the network master. The red DIAGNOSTIC LED indicates a network- initiated trip. See Section 2.8. Refer to the appropriate SE-330 Pulsing ground-fault current is distinguishable from charging communications manual. current and noise, and it can be traced with a clip-on ammeter or current probe. If a pulsing current is detected on a cable or conduit, then the fault is downstream. Systematic testing allows faults to be located without isolating feeders or interrupting loads. Stop pulsing when a fault is located. Page 6 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
2.6 Relay K1 LED The yellow RELAY K1 LED follows the state of relay K1 and is on when K1 is energized (contact closed).
2.7 Unit Healthy Output The UNIT HEALTHY relay K4 provides a basic status of processor health, which is energized when the processor is operating. It can be ordered with N.O. or N.C. contacts. See section 7. An ENHANCED HEALTH status can be assigned to relays K1, K2, and K3. See Section 2.9. UNIT HEALTHY relay K4 is energized when the processor is operating. It can be ordered with N.O. or N.C. contacts. See Section 7. NOTE: The K4 output changes state momentarily during a FIG. 2. Analog-output connections. processor reset.
NOTE: K4-contact rating is 100 mA maximum. 3. INSTALLATION 3.1 SE-330 2.8 Diagnostic LED Outline and panel-cutout dimensions for the SE-330 are shown The DIAGNOSTIC LED is used to annunciate trips without in Fig. 4. To panel mount the SE-330, insert it through the panel individual LED indication. The number of short LED pulses between cutout and secure it with the four included 8-32 locknuts and flat pauses indicates the cause of the trip. washers. By default, only critical diagnostic flash codes are shown. Non- If an optional SE-IP65CVR-G hinged cover is used, follow the critical diagnostic codes include SD Card status and USB Error included installation instructions. See Figs. 6 and 7. status. All other diagnostic codes are considered critical. All connections to the SE-330 are made with plug-in, wire- Starting with SE-330 firmware version 2.60 and SE-MON330 clamping terminal blocks. Each plug-in terminal block can be secured software version 3.8, the SE-330 can be configured to show to the SE-330 by two captive screws for reliable connections. only critical diagnostic codes. In this configuration, only critical Outline dimensions and mounting details for surface mounting diagnostic codes will be indicated with the DIAGNOSTIC LED. the SE-330 are shown in Fig. 5. Fasten the optional surface-mount Diagnostic messages are always visible with the SE-MON330 adapter to the mounting surface and make connections to the software. See Sections 4.2 and 5. adapter terminal blocks. Follow Fig. 5 instructions to mount or remove the SE-330. 2.9 Enhanced Health Status Ground terminal 7 (G) and connect terminal 6 (R) to the sensing- The Enhanced Health Status can be assigned to relays K1, K2, resistor R terminal. and K3 (firmware version 3.00 and higher). The assigned relay(s) Use terminal 1 (L1) as the line terminal on ac systems, or the will trip when a critical diagnostic code occurs. See Section 5 for a positive terminal on dc systems. Use terminal 2 (L2/N) as the list of critical diagnostic codes. neutral terminal on ac systems or the negative terminal on dc systems. Connect terminal 3 ( ) to ground. 2.10 Analog Output An isolated 4–20-mA output indicates NGR current with full- NOTE: Disconnect terminal 1 (L1) and terminal 2 (L2/N) before scale output corresponding to the CT rating. An internal 24-VDC performing dielectric strength testing of the control panel. supply allows the analog output to be connected as a self-powered output. Power from an external supply is required for loop-powered operation. See Fig. 2. A PGA-0520 analog meter can be panel- NOTE: Connections to terminals 4 (SPG) and 5 (SPGA) are not mounted to display the NGR current. See Fig. 19 and Section 7. required when using the SE-330 hardware revision 10 and higher. However, it is recommended to connect terminal 4 to terminal 5 to maintain backwards compatibility with the older SE-330 series (hardware revision 04A and lower). Page 7 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
TRANSFORMER OR GENERATOR
NOTE 1 NEUTRAL NOTE 16
NOTE 2 NOTE 12 NOTES 11 12 XXX:1 OR XXX:5 EFCT- C ELCT - OR ELCT30-
N NOTE NOTE 1 ER SERIES 8 10 11 8 10 11 SENSING RESISTOR NGR S 1 5 C S 1 5 C 5 A NOTE 4 SE-330 1 A EFCT R G 6 R ALTERNATE CT CONNECTIONS G NOTE 5 L/ SUPPLY NOTE 6 N/- SUPPLY 1 2 L1 L2/N NOTES: 1 NOTE 1 14 22 2 C 1. USE SEPARATE LUG TO CONNECT 2 26 24 SENSING-RESISTOR TERMINAL N TO NEUTRAL. GF GROUND 25 2. LOCATE THESE COMPONENTS NEAR FAULT TRANSFORMER OR GENERATOR. 2 2 RF . ALTERNATE SENSING-RESISTOR 28 RESISTOR TERMINAL-N CONNECTION. THE NEUTRAL FAULT 4 CONNECTION IS NOT MONITORED. 12 1 UNIT HEALTHY 4. VOLTAGE BETWEEN SENSING-RESISTOR 18 TERMINALS R AND G IS LIMITED TO 100 V BY NOTE 24V 14 NO INTERNAL CLAMP. CONNECTION 1 NOTE 8 + NOTE 14 ANALOG OUTPUT 5. SEE SECTION .4 FOR ISOLATED-GROUND 20 CONNECTION. REMOTE 15 - NOTE 15 RESET RESET 21 16 0V 6. RELAY CONTACTS SHOWN WITH SE- 0 PGA-0520 DE-ENERGI ED. PULSE PULSE ENABLE ENABLE 1 . OPTIONAL N.C. 4 AVAILABLE. USB PORT NOTE 8. LOOP-POWERED CONNECTION USES 4 SPG TERMINALS 1 AND 20 ONLY. NOTE 18 5 SPGA . MINI-B USB DEVICE CONNECTOR. MICRO SD OPTIONAL SLOT NETWOR COM SE-330 10. REFER TO APPROPRIATE SE- 0 NOTE 10 COMMUNICATIONS INTERFACE MANUAL.
11. TWO-CONDUCTOR TWISTED CABLE INDICATION RE UIRED, SHIELDED RECOMMENDED. GROUND-FAULT R TRIP 12. CT CONNECTION IS NOT POLARITY-SENSITIVE. RESIS- R TOR-FAULT TRIP 1 . CONNECT CONTACTS 1, 2, , AND 4 AS RE UIRED FOR PROTECTION, R DIAGNOSTIC INDICATION, AND CONTROL.
G CALIBRATED 14. EXTERNAL LIGHTS AND SWITCHES NOT INCLUDED WITH SE- 0. Y RELAY 1 15. SELF-POWERED 4-20 mA OUTPUT.
G POWER 16. TYPICAL TRIPPING SYSTEM.
1 . GROUND CURRENT SENSOR AT TERMINAL 11 ONLY.
18. CONNECTION NOT RE UIRED. SEE SECTION .1 FOR COMPATABILITY WITH OLDER SE- 0 SERIES.
FIG. 3. SE-330 connection diagram. Page 8 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
16.0 1 2.0 (0.6 ) (5.20) 8. ( .8 ) PANEL THIC NESS 1.6 (0.06) TO 4.8 (0.1 )
LITTELFUSE STARTCO
NEUTRAL-GROUNDING-RESISTOR SE-330 MONITOR
GROUND RESISTOR 1 2 FAULT FAULT U NI T K 4 H EA L T HY 1 3 TRIP DIAGNOSTIC TRIP NC - 1 4 1 - L 1 1 5 R ES E T 2 - L 2 / N 1 6 CALIBRATED P U L S E EN AB L E 3 - 1 7 4 - S P G + 2 4 V - 1 8 5 - S P G A + - 1 9 RELA A NA L OG O U T P U T - - 20 0 00 0V - 2 1 0 0 0 3 0 0 POWER 30 00 0 00 00 A TTE NT IO N 00 0 00 212.6
(8. ) DISENGAGE CAPTIVE RETAINING SCREWS BEFORE REMOVING MEM 0 000 PLUG-IN TERMINAL BLOCKS GF TRIP LEVEL VN TRIP LEVEL ( . 0) S 0 Ω 0 0 Ω 185.4 CT RATING VN VN 0 0 0 0 CAL 0 0 22 0 3 3 0 K 1 6 - R S E NS I NG 2 3 0 0 7 - G R E S IS T OR 0 0 0 0 3 0 GF TRIP TIME PULSE PERIOD 2 4 G R OU N D FA U L T 25 K2 8 - S 2 6 9 - 1 E 2 7 F R ES I S T OR 1 0 - 5 1 C FA U L T 2 8 5 A T K3 RESET 1 1 - C A 2 9
FRONT VIEW SIDE VIEW REAR VIEW
2. ( .65) NOTES: 8.2 6.2 (0. 2) ( .00) 1. DIMENSIONS IN MILLIMETRES (INCHES). ( .8 ) 200.0 186.0 ( . 2)
R 4.8 (0.1 ) MAXIMUM
4. 5 (0.18 ) DIA
4 LOCATIONS . 0 (0.28)
PANEL-MOUNT CUTOUT
FIG. 4. SE-330 outline and panel-mounting details. Page 9 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
114. (4.50) RETAINER SCREW 8.0 8. 1 8.0 6.4 (0.25) RETAINER (0. 1) ( .8 ) (5.4 )
LITTELFUSE STARTCO
NEUTRAL-GROUNDING-RESISTOR SE-330 MONITOR
GROUND RESISTOR 12 U NI T FAULT FAULT K4 HE A L T HY 13 TRIP DIAGNOSTIC TRIP 14 - N C 15 L1 - 1 1 R E S E T 1 6 L2 / N - 2 CALIBRATED 2 P U L S E E NA B LE 17 - 3 3 1 8 - + 2 4 V S P G - 4 4 1 9 - + SP G A - 5 5 A N A LO G OU T P U T RELA 20 - - 2 1 - 0V 0 00 0 0 0 3 0 0 POWER 30 00 0 00 00 00 0 00 MEM 0 000 225.4 (8.8 ) 212.6
GF TRIP LEVEL VN TRIP LEVEL (8. ) S 0 Ω 0 0 Ω CT RATING VN VN 0 0 0 0 CAL 2 2 0 0 K 1 0 3 3 0 2 3 R - 6 6 S E NS IN G 0 0 R E S I S T OR G - 7 7 0 0 0 0 3 0 GF TRIP TIME PULSE PERIOD 2 4 G R O U ND 2 5 F A U L T K2 26 S - 8 8 2 7 E 1 - 9 9 R E S I S T OR F F A U L T C 1 28 T 5 -10 1 0 K3 A 5 RESET 29 A C -1 1 1 1
FRONT VIEW SE- 0-SMA FRONT VIEW SIDE VIEW
25.4 6 .5 5.0 (0.20) (1.00) (2.50) NOTES:
(NOTE 2) 1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M4 OR 8- 2 PANHEAD.
INSTALLATION
1. LOOSEN RETAINER SCREWS, MOVE RETAINERS OUTWARD AND TIGHTEN RETAINER SCREWS.
2. MATE MONITOR WITH ADAPTER PLUG-IN TERMINALS. 215. (8.50) LOOSEN RETAINER SCREWS TO LET RETAINERS SNAP OVER MONITOR BAC PLATE.
. ENSURE THAT RETAINERS ARE AGAINST MONITOR BODY AND TIGHTEN RETAINER SCREWS.
REMOVAL
1. LOOSEN RETAINER SCREWS, SLIDE RETAINERS AWAY FROM MONITOR BODY AND TIGHTEN RETAINER SCREWS. BE EL OUTLINE 2. PULL MONITOR FORWARD.
ADAPTER PANEL OUTLINE MOUNTING DETAIL
FIG. 5. SE-330 outline and surface-mounting details. Page 10 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
TO PREVENT UNAUTHORI ED ENTRY:
4.0 1. USE WIRE SEAL THROUGH HOLES IN (1. 4) WEATHERPROOF COVER ASSEMBLY, OR
2. SECURE WITH THE PLASTIC THREAD FORMING SCREW SUPPLIED IN IT. TOP VIEW
SHOWN HOLE FOR WITH SEAL WIRE SEAL 250.0 ( .84)
12 .0 (5.00)
FRONT VIEW SIDE VIEW NOTES:
1. DIMENSIONS SHOWN IN MILLIMETRES (INCHES).
2. SHOWN WITH WEATHERPROOF SNAPS CLOSED.
. REFER TO PANEL MOUNTING CUTOUT (FIG. 4) FOR PANEL MOUNTING DETAIL.
FIG. 6. SE-IP65CVR-G weatherproof cover outline. Page 11 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
INSTALL O-RING INTO GROOVE IN THE REAR OF WEATHERPROOF WINDOW
INSERT THE SE- 0 THROUGH OPENING OF THE WEATHERPROOF WINDOW UNTIL IT IS SECURELY NESTED TO THE BAC OF THE DAR GREY PVC PANEL.
INSTALL O-RING INTO THE GROOVE IN THE REAR FRONT PANEL OF WEATHERPROOF WINDOW ASSEMBLY. DETAILS NOT SHOWN. INSERT ASSEMBLY INTO PANEL AND FASTEN WITH THE HARDWARE PROVIDED WITH THE SE- 0.
FIG. 7. SE-IP65CVR-G weatherproof cover installation. Page 12 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
3.2 Sensing Resistor If a ground fault in the sensing-resistor conductor is unlikely and it does not pass through the ground-fault-CT window, then Outline and mounting details for the ER-600VC, ER-5KV, ER- protection will be minimally lost. See Note 3 in Fig. 3. 5WP, ER-15KV, ER-25KV, and ER-35KV sensing resistors are shown in Figs. 8, 11, 12, 13, 14, and 15. Install the NGR and the sensing NOTE: Voltage at terminal N rises to line-to-neutral voltage when resistor near the transformer or generator. When installed outdoors, a ground fault occurs. The same clearances are required for sensing a sensing resistor must be installed in a suitable enclosure. An resistors as for NGRs. optional SE-MRE-600 Moisture-Resistant Enclosure is available for applications that may expose an ER-600VC to moisture. See Figs. NOTE: A parallel ground path created by moisture can result in a 9 and 10. The weather-protected ER-5WP shown in Fig. 12 is an false resistor-fault trip. Moisture sources include wind-driven rain ER-5KV with moisture-resistant terminal covers. Use an ER-5WP in or snow, and condensation. Sensing-resistor terminal R and its applications in which it might be exposed to moisture. The ER-15KV, connection to SE-330 terminal R, including interposing terminal ER-25KV, and ER-35KV include moisture-resistant terminal covers. blocks, must remain dry. Use suitable water-tight fittings. Ground sensing-resistor terminal G. Pass the sensing-resistor-to-neutral conductor and the NGR-to- NOTE: The neutral-to-sensing-resistor-terminal-N connection is neutral conductor through the ground-fault-CT window as shown not a neutral conductor as defined in Canadian Electrical Code Rule in Fig. 3. Separately connect sensing-resistor terminal N and the 10-308 and National Electrical Code Section 250.36(B). It is not NGR to the neutral to include neutral connections in the monitored required to be 8 AWG (8.36 mm2) or larger. Since current through loop. Alternatively, if the NGR connection to system neutral does this conductor is always less than 250 mA, a 14 AWG (2.08 mm2) not need to be monitored, connect terminal N to the NGR neutral conductor insulated to the system voltage is sufficient. terminal.
RATINGS: MAXIMUM VOLTAGE . 600 Vac MAXIMUM CURRENT . 0 mA RESISTANCE ...... 20 Ω THERMAL: 600 Vac ...... 6 MINUTES ON, 41.5 40.0 60 MINUTES OFF (1.6 ) (1.5 ) 420 Vac ...... CONTINUOUS 40.0 22.2 10.5 1 .0 10.5 (1.5 ) (0.8 ) (0.41) (0. 5) (0.41) 20 K Ω 8.0 at 600 Vac 600 at (0. 1)
30 mA Ma x 30 mA NOTE Continuous at 420 Vac 420 at Continuous
N 50/60 Hz 600 Vac 6 Minutes On, 60 Minutes Off 60 Minutes On, 6 Minutes SE-325, SE-330, SE-330AU R Use with: Duty Cycle: Rating: G 105.0 (4.1 ) 8 .0 (4.1 ) 105.0 ( .50) GC131105487 E R - 6 0 0 V C SENSI NG RES I STOR
20 K Ω SENSING RESISTOR Serial No: 600 VAC MAX 02 IEEE 32 LR 53428 R US Revision: 1-800-TEC-FUSE (1-800-832-3873) Made in Saskatoon, Canada ER-600VC C
4.5 (0.18) DIA
C BORE 10.0 (0. ) DIA 8.0 (0. 1) .2 (0.1 ) DEEP FRONT SIDE MOUNTING DETAIL
NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. TERMINAL-BLOC SCREWS: 6- 2 0.25.
. MOUNTING SCREWS: M4 OR 8- 2.
4. ON REVISION 2 UNITS ENCLOSURE IS ELECTRICALLY CONNECTED TO TERMINAL G THROUGH JUMPER FROM TERMINAL G TO SCREW. THIS CONNECTION MAY BE REMOVED FOR DIELECTRIC STRENGTH TESTING. ENSURE THAT THE JUMPER IS INSTALLED AFTER TESTING.
5. ON REVISION 1 UNITS, SCREW IS NOT PRESENT AND ENCLOSURE IS ELECTRICALLY CONNECTED TO TERMINAL G.
6. NOT ALL CERTIFICATIONS SHOWN.
FIG. 8. ER-600VC sensing resistor. Page 13 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018 (4.80) 122.0 122.0 (4.80) GAS ET
120.4 120.4 (4. 4) (4. 4)
ENCLOSURE - TOP VIEW COVER - INSIDE VIEW (COVER REMOVED) (0. 5) 1 .1 .5 82.5 (0. 8) ( .25) (1 .25) 82.5 122.0 (4.80)
M6 OR 0.25-20
120.4 (4. 4)
ENCLOSURE - TOP VIEW MOUNTING DETAIL
120.4 (4. 4) (0.80) 20.4 NOTES:
1. DIMENSIONS IN MILLIMETRES (INCHES).
2. MOUNTING SCREWS: M6 OR 0.25-20. 84.6 ( . )
ENCLOSURE - SIDE VIEW
FIG. 9. SE-MRE-600 moisture-resistant enclosure outline. Page 14 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
NOTE 2 MOUNTING SCREWSMOUNTING FOURSCREWS LOCATIONS NOTE4 LOCATIONS 4 NOTE 4 N
R
G NOTE
E R - 6 0 0 V C SENSI NG RES I STOR 20 K Ω 600 VAC MAX
NOTE 2 ENCLOSURE - TOP VIEW COVER - INSIDE VIEW (COVER REMOVED)
ASSEMBLY INSTRUCTIONS
1. DRILL HOLE FOR ENCLOSURE WIRE ENTRY. USE LI UID-TIGHT FITTING.
2. REMOVE NYLON NUTS AND WASHERS. INSERT ER-600VC INTO ENCLOSURE. REPLACE NUTS AND WASHERS.
. ATTACH GROUND WIRE FROM ENCLOSURE TO COVER AND TO ER-600VC TERMINAL G.
4. MOUNT SE-MRE-600 IN PLACE USING M6 OR 0.25-20.
5. COMPLETE OTHER WIRING AND REPLACE COVER.
FIG. 10. ER-600VC installed in SE-MRE-600. Page 15 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
RATINGS: 81.0 MAXIMUM RATINGS: VOLTAGE . 2,500 Vac MAXIMUM CURRENT. 125 mA 21.0 (15.00) 81.0 MAXIMUM VOLTAGE . 2,500 Vac RESISTANCE ...... 20 Ω MAXIMUM CURRENT. 125 mA (0.8 ) 21.0ALTERNATE NEUTRAL CONNECTION(15.00) THERMAL ...... CONTINUOUS RESISTANCE ...... 20 Ω 12.0 TOR UE (0.8 ) ALTERNATE NEUTRAL CONNECTION THERMAL ...... CONTINUOUS (0.4 )12.0 NEUTRAL CONNECTION TERMINALTOR UE N ( LOCATIONS) 10- 2 INSERT 5.6 N-m (50 in-lb) (0.4 ) NEUTRAL CONNECTION TERMINAL. .N. .( . LOCATIONS) OTHERS ...... .0 N-m (80 in-lb) 10- 2 INSERT. . . . . 5.6 N-m (50 in-lb)lbf•in.) 0.25-20 UNC E R - 5 KV OTHERS ...... .0 N-m (80 in-lb)lbf•in.) SENSING RESI STOR C A U T I O N N THREADED 20 KΩ 0.25-20 UNC 2500 VAC M AX E R - 5 KV H I G H V O L T A G E N INSERT SENSING RESI STOR C A U T I O N N THREADED
105.0 20 KΩ VOLTAGE ON THIS SURFACE RISES (4.1 ) 2500 VAC M AX TO LINE-TO-NEHUTI GRAHL VOVLTOAGLET A G E INSERT WHEN A GROUND FAULT OCCURS N N 10- 2 THREADED
105.0 VOLTAGE ON THIS SURFACE RISES (4.1 ) . TO LINE-TO-NEUTRAL VOLTAGE INSERT
52.5 10- 2 THREADED (2.0 )
(0. 1) WHEN A GROUND FAULT OCCURS N
. INSERT 52.5 (2.0 ) (0. 1) TOP VIEW 16.0TOP VIEW (12.44) 16.0 (12.44)
0.25-20 UNC STUD 0.25-20 UNC STUD 188.0 ( .40)
NOTE 2 188.0 ( .40) NOTE 2
R G R G NOTES 5 6 SIDE VIEW NOTES 5 6 FRONT VIEW SIDE VIEW FRONT VIEW NOTES: MINIMUM DISTANCE NOTES: TO ADJACENTMINIMUM OBJECTS DISTANCE 1. DIMENSIONS IN MILLIMETRES (INCHES). TO ADJACENT OBJECTS 1. DIMENSIONS IN MILLIMETRES (INCHES). 2. TERMINAL-BLOC SCREWS: 6- 2 0.25. 2. TERMINAL-BLOC SCREWS: 6- 2 0.25. 12 .0 . MOUNTING SCREWS: M6 OR 0.25-20. NOTE (5.00) 12 .0 . MOUNTING SCREWS: M6 OR 0.25-20. NOTE MINIMUM CLEARANCE FROM BASE (5.00) 4. THIS DEVICE CAN DISSIPATE 254.0 (10.00) MINIMUM CLEARANCE FROM BASE 004. WATTS. THIS DEVICE TO MINIMI E CAN DISSIPATE SURFACE 254.0 254.0 (10.00) (10.00) TEMPERATURES FOR SYSTEMS 00 WATTS. TO MINIMI E SURFACE 254.0 ALLOWED TEMPERATURES TO OPERATE FOR SYSTEMS (10.00) CONTINUOUSLY ALLOWED TO WITH OPERATE A GROUND FAULT, CONTINUOUSLY MOUNT VERTICALLY WITH AWITH GROUND R G FAULT, TERMINALS MOUNT DOWN. VERTICALLY WITH R G TERMINALS DOWN. 55.6 5. ON REVISION 2 UNITS BASE IS 50. (14.00) 55.6 ELECTRICALLY5. ON REVISION CONNECTED 2 UNITS BASE TO IS (2.00)50. (14.00) TERMINAL ELECTRICALLY G THROUGH CONNECTED JUMPER TO 45 .0 FROM TERMINAL G TO SCREW. (2.00) TERMINAL G THROUGH JUMPER (18.00)45 .0 THIS FROMCONNECTION TERMINAL MAY G BETO SCREW. REMOVED THIS CONNECTIONFOR DIELECTRIC MAY BE (18.00) STRENGTH REMOVED TESTING. FOR DIELECTRIC ENSURE MOUNTING DETAIL THAT STRENGTH THE JUMPER TESTING. IS INSTALLED ENSURE MOUNTING DETAIL AFTER THAT TESTING. THE JUMPER IS INSTALLED AFTER TESTING. 6. ON REVISION 0 1 UNITS SCREW IS6. NOT ON PRESENT REVISION AND 0 BASE1 UNITS IS SCREW ELECTRICALLY IS NOT PRESENT CONNECTED AND BASE TO IS TERMINAL ELECTRICALLY G. CONNECTED TO TERMINAL G. . CERTIFICATIONS NOT SHOWN. . CERTIFICATIONS NOT SHOWN.
FIG. 11. ER-5KV sensing resistor. Page 16 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
RATINGS: RATINGS: MAXIMUM VOLTAGE . 2,500 Vac 2,500 Vac 81.0 MAXIMUMMAXIMUM VOLTAGE CURRENT.. 125 mA 81.0 MAXIMUM CURRENT 125 mA RESISTANCE ...... 20 Ω 21.0 (15.00) RESISTANCE ...... 20 Ω 21.0 (15.00) THERMAL ...... CONTINUOUS ...... CONTINUOUS (0.8 ) ALTERNATE NEUTRAL CONNECTION THERMALTOR UE (0.8 ) ALTERNATE NEUTRAL CONNECTION TOR UE 12.0 TERMINAL N ( LOCATIONS) 12.0 TERMINAL N ( LOCATIONS) (0.4 ) NEUTRAL CONNECTION 10- 2 INSERT. . . . . 5.6 N-m (50 in-lb)lbf•in.) (0.4 ) NEUTRAL CONNECTION 10- 2 INSERT. . . . . 5.6 N-m (50 in-lb) OTHERS ...... .0 N-m (80 in-lb)lbf•in.) OTHERS ...... .0 N-m (80 in-lb) 0.25-20 UNC E R - 5 W P 0.25-20 UNC SENSING RESI STOR C A U T I O N N THREADED E R - 5 W P SENSING 2R0E KSΩI S TOR C A U T I O N N THREADED 2500 VAC MAX H I G H V O L T A G E 20 KΩ N INSERT 2500 VAC MAX H I G H V O L T A G E N INSERT 105.0 VOLTAGE ON THIS SURFACE RISES (4.1 ) TO LINE-TO-NEUTRAL VOLTAGE
105.0 VOLTAGE ON THIS SURFACE RISES
(4.1 ) 10- 2 THREADED TWO HLIENNE A-T GOR-NOEUUNTDR FAAL UVLOTL OTCACGUERS N WHEN A GROUND FAULT OCCURS N 10- 2 THREADED
. INSERT 52.5 (2.0 ) . (0. 1) INSERT 52.5 (2.0 ) (0. 1)
TOPTOP VIEW VIEW 16.0 16.0 (12.44) (12.44)
0.25-20 UNC STUD 0.25-20 UNC STUD 188.0 ( .40) 188.0 ( .40)
NOTE 2 AND 5 NOTE 2 AND 5
SIDE VIEW SIDE VIEW FRONTFRONT VIEW VIEW NOTES: MINIMUM DISTANCE NOTES: MINIMUMMIN DISTANCE DISTANCE TO ADJACENT OBJECTS TO ADJACENT OBJECTS 1. DIMENSIONS IN MILLIMETRES (INCHES). 1. DIMENSIONS IN MILLIMETRES (INCHES). 2. TERMINAL-BLOC SCREWS: 6- 2 0.25 2. TERMINAL-BLOC SCREWS: 6- 2 0.25 CABLE ACCESS OPENING IS 1/2 NPT. CABLE ACCESS OPENING IS ½1/2 NPT NPT. 12 .0
USE A LI UID-TIGHT FITTING FOR NOTE (5.00) 12 .0
USE A LI UID-TIGHT FITTING FOR (5.00) CABLE ENTRY. NOTE MINIMUM CLEARANCE FROM BASE CABLE ENTRY. MIN CLEARANCE FROM BASE MINIMUM CLEARANCE254.0 (10.00) FROM BASE . MOUNTING SCREWS: M6 OR 0.25-20. 254.0 (10.00) 254.0
. MOUNTING SCREWS: M6 OR 0.25-20. (10.00) 254.0 (10.00) 4. THIS DEVICE CAN DISSIPATE 4. THIS DEVICE CAN DISSIPATE 00 WATTS. TO MINIMI E SURFACE 00 WATTS. TO MINIMI E SURFACE TEMPERATURES FOR SYSTEMS TEMPERATURES FOR SYSTEMS ALLOWED TO OPERATE ALLOWED TO OPERATE CONTINUOUSLY WITH A GROUND CONTINUOUSLY WITH A GROUND 55.6 FAULT, MOUNT VERTICALLY WITH 55.6 FAULT, MOUNT VERTICALLY WITH 50. (14.00) R G TERMINALS DOWN. 50. (14.00) R G TERMINALS DOWN. (2.00) (2.00) 45 .0 5.5. BASE BASE IS IS ELECTRICALLY ELECTRICALLY CONNECTED CONNECTED 45 .0 5. BASE IS ELECTRICALLY CONNECTED TO TO TERMINAL TERMINAL G G THROUGH THROUGH JUMPER JUMPER (18.00) TO TERMINAL G THROUGH JUMPER (18.00) FROM FROM TERMINAL TERMINAL G TOG TO SCREW. SCREW. FROM TERMINAL G TO SCREW. THIS THIS CONNECTION CONNECTION MAY MAY BE BE REMOVED FOR THIS CONNECTION MAY BE MOUNTING DETAIL DIELECTRIC REMOVED FORSTRENGTH DIELECTRIC TESTING. MOUNTING DETAIL ENSURE REMOVED THAT FOR THE DIELECTRIC JUMPER IS INSTALLED STRENGTH TESTING. ENSURE THAT AFTER STRENGTH TESTING. TESTING. ENSURE THAT THE JUMPER IS INSTALLED AFTER THE JUMPER IS INSTALLED AFTER TESTING. 6. CERTIFICATIONSTESTING. NOT SHOWN. 6. CERTIFICATIONS NOT SHOWN. 6. CERTIFICATIONS NOT SHOWN.
FIG. 12. ER-5WP sensing resistor. Page 17 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
FIG. 13. ER-15KV sensing resistor. Page 18 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
80.0 ( 0. 0) 80.0 ( 0. 0) RATINGS: MAXIMUMMAX VOLTAGE VOLTAGE ...... 14,400 Vac E R - 2 5 KV SENSING RESISTOR CAUTIONC A U T I O N ...... 100 K Ω RATINGS:MAXIMUMMAX CURRENT CURRENT . 144 mA 14,400 VAC MAX 144 mA R 1 M I N UTE MAX HIGHH I G H VOLTAGE V O LT A G E N G VOLTAGE AT TERMINAL N RISES RESISTANCE MAXIMUM VOLTAGE...... 10014,400 Ω Vac TO LINE-TO-NEUTRAL VOLTAGE
(5.6 ) E R - 2 5 KV 144.0 SENSING RESISTOR WHEN ACAUTION GRCOAUNDU FTAUI OLT NOCCURS 100 K Ω MAXIMUM CURRENT. 14,400 VAC MAX THERMAL 144 mA R 1 M I N UTE MAX HIGHH I G H VOLTAGE V O LT A G E N G VOLTAGE AT TERMINAL N RISES RESISTANCE ...... 1100 MIN Ω ON, TO LINE-TO-NEUTRAL VOLTAGE 14,400 Vac...... 1 MINUTE ON, (5.6 ) 144.0 WHEN A GROUND FAULT OCCURS THERMAL 120 MINUTESMIN 14,400 Vac...... OFF1 MINUTE ON, NOTES 2 AND 4 0.25-20 BINDING HEAD
20.5 2,500 Vac ...... CONTINUOUS120 MINUTES (0.81) OFF NOTES 2 AND 4 0.25-20 BINDING HEADTOP TOR UE
20.5 2,500 Vac ...... CONTINUOUS (0.81) TERMINAL N ...... .0 N-m (80 in-lb)lbf•in.) TOP TOR UE TERMINAL N ...... .0 N-m (80 in-lb) 20.0 (12.60) 20.0 (12.60)
FRONT SIDE FRONT SIDE 800.0 ( 1.50) 60.0 40.0 800.0 40.0 (2.40) (1 . 8) ( 1.50) (1 . 8) 60.0 40.0 40.0 (2.40) (1 . 8) (1 . 8)
NOTES: 1. DIMENSIONS IN NOTE NOTES: MILLIMETRES (INCHES). 5 4.0 100.0
(21.00) 1. DIMENSIONS IN ( . 4) NOTE 2. TERMINAL-BLOC MILLIMETRES (INCHES). SCREWS: 5 4.0 100.0
(21.00) 6- 2 0.25. ( . 4) 2. TERMINAL-BLOC SCREWS: . MOUNTING6- 2 0.25. SCREWS: M6 OR 0.25-20 MINIMUM CLEARANCE FROM BASE . MOUNTING SCREWS: MIN CLEARANCE508.0 (20.00) FROM BASE 4. USE M6 ORLI UID-TIGHT 0.25-20 FITTING MINIMUM CLEARANCE FROM BASE FOR TERMINAL-BLOC - 508.0 (20.00) 4. USE LI UID-TIGHT FITTING 21 .0
(8.50) ENCLOSURE CABLE ENTRY. FOR TERMINAL-BLOC - MINIMUM DISTANCE 5. MOUNT AS SHOWN 21 .0
(8.50) ENCLOSURE CABLE ENTRY. TO ADJACENT OBJECTS WITH BASE HORI ONTAL. MINMINIMUM DISTANCE DISTANCE 5. MOUNT AS SHOWN TO ADJACENT OBJECTS 6. CERTIFICATIONSWITH BASE HORI ONTAL. NOT SHOWN. MOUNTING DETAIL 6. CERTIFICATIONS NOT SHOWN. MOUNTING DETAIL
FIG. 14. ER-25KV sensing resistor. Page 19 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
RATINGS:RATINGS: MAXIMUMMAXIMUMMAX VOLTAGE VOLTAGE VOLTAGE ...... 22,000 22,000 Vac VacVac MAXIMUMMAXIMUMMAX CURRENT CURRENTCURRENT ...... 220 220 mAmA RESISTANCERESISTANCE ...... 100100 ΩΩ 1000.01000.0 THERMALTHERMAL ( .40)( .40) 22,00022,000 Vac Vac ...... 11 MINUTEMINMINUTE ON, ON,ON, 120120 MINUTESMINUTESMIN 20.5 20.5
(0.81) OFF (0.81) OFF E R - 3 5 KV S E NRS-IN3G5 RKEVSIS TO R CCAAUUTTI OI ONN S E NSIN G 1R0 0E SKI S TO R 10 0 K Ω 22 ,20 0 VΩAC MA X R 22 ,20 0 VAC MA X H IG H V O L T A G E N ,000 Vac CONTINUOUS R H IG H V O L T A G E N ...... 1 M I N UTE M AX ,000 Vac ...... CONTINUOUS 1 M I N UTE M AX G G VOVLOTLATGAEG AE TA T ETREMRIMNIANLA NL NR ISREISSES TOT LO INLIEN-ET-OT-ON-ENUETURTARLA VL OVLOTLATGAEGE WWHEHNE NA AG RGORUONUDN FD AFUALUTL OT COCCUCRUSRS (5.20) 1 2.0 (5.20) 1 2.0 TOR UETOR UE TERMINALTERMINAL NN ...... .0 .0 N-mN-m (80(80 in-lb)in-lb)lbf•in.)
NOTESNOTES 22 ANDAND 44 0.25-200.25-20 BINDINGBINDING HEADHEAD TOPTOP 45 .0 45 .0 (18.10) (18.10)
FRONTFRONT SIDESIDE 1600.01600.0 (6 .00)(6 .00)
MINIMUMMINIMUMMIN CLEARANCE CLEARANCECLEARANCE FROM FROMFROM BASE BASEBASE 685.0685.0 (2 .00)(2 .00)
50.0 50.0 400.0400.0 400.0400.0 (1 .80)(1 .80) (15. 0)(15. 0) (15. 0)(15. 0)
NOTENOTE 800.0 800.0 100.0 ( . 0) 100.0 ( . 0) ( 1.50) ( 1.50) 50.0 50.0 (1 .80) (1 .80) MINIMUMMINIMUMMIN DISTANCE DISTANCEDISTANCE TOTO ADJACENTADJACENT OBJECTSOBJECTS
MOUNTINGMOUNTING DETAILDETAIL
NOTES:NOTES: 1.1. DIMENSIONSDIMENSIONS ININ MILLIMETRESMILLIMETRES (INCHES).(INCHES).
2.2. TERMINAL-BLOC TERMINAL-BLOC SCREWS:SCREWS: 6- 26- 2 0.25.0.25. . . MOUNTINGMOUNTING SCREWS:SCREWS: M6M6 OROR 0.25-20.0.25-20. 4.4. USEUSE LI UID-TIGHTLI UID-TIGHT FITTINGFITTING FORFOR TERMINAL-BLOC -ENCLOSURE TERMINAL-BLOC -ENCLOSURE CABLECABLE ENTRY.ENTRY. 5.5. MOUNTMOUNT ASAS SHOWNSHOWN WITH WITH BASEBASE HORI ONTAL.HORI ONTAL. 6.6. CERTIFICATIONSCERTIFICATIONS NOTNOT SHOWN.SHOWN.
FIG. 15. ER-35KV sensing resistor. Page 20 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
3.3 Ground-Fault CT Select and install a ground-fault CT that will provide the desired trip level. Typically, the CT-primary rating should be approximately equal to the NGR let-through-current rating. This provides an appropriate GF TRIP LEVEL setting range and analog-output scaling. See Sections 2.1.2 and 2.9. The outline and mounting details for the ELCT5- and ELCT30- series current sensors are shown in Fig. 16 and Fig. 17. Ground- fault-CT connections and the typical ground-fault-CT location are shown in Fig. 3. For SE-325 replacement applications, the existing CT200 current sensor will typically have to be replaced. However, where a replacement is not necessary or possible, the CT200 can be connected to either the 1- or 5-A input. This CT has a 200:5 current ratio. If connected to the 1-A input, the ground-fault trip level will be a percentage of 40 A. See Section 2.1.2. The accuracy of a typical current sensor, including the CT200, will decrease when below 5% of its current rating. CT-primary current- injection testing is recommended to verify trip levels below 5% of the CT-primary rating. See Section 9.4. Littelfuse Startco current sensors with a 50-mA-secondary rating, such as the ELCT5-x and ELCT30-series, are designed for use at low levels and respond linearly to 2% current rating. NOTE: The current-sensor insulation class is of no consequence if its secondary is grounded and the conductors through its window are insulated for the system voltage. Medium-voltage systems may require a bushing-type CT. 115.59 3.38 [4.551] R[0.133] Page 21
SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018 61.09 44.83 28.58 (2.405) [1.765] [1.125]
137.69 [5.421] 7.62 [0.300] 87.73 [3.454]
115.59 3.38 [4.551] R[0.133]
115.59 3.38
[4.551] R[0.133] [5.725] 145.42 61.09 44.83 28.58
134.12 [5.280] (2.405) [1.765] [1.125]
75.60 [2.976]
61.09 44.83 28.58 (2.405) [1.765] [1.125]
137.69 [5.421] 7.62 DESCRIPTION: [0.300] UNLESS NOTED OTHERWISE TOP VIEW AND MOUNTING DETAIL FRONT VIEW DIMENSIONS ARE IN INCHES 87.73 TOLERANCES: [3.454] FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV MATERIAL TWO PLACE DECIMAL 0.01 137.69 THREE PLACE DECIMAL 0.005 [5.421] 7.62 NAME DATE NOT DRAWN TO SCALE WEIGHT: SHEET 1 OF 1 [0.300] DRAWN BY 87.73 [3.454]
NOTES:
1. DIMENSIONS IN MILLIMETERS [INCHES]. [5.725] 145.42
2. MOUNTING SCREWS: M6134.12 OR[5.280] 1/4”.
75.60 [2.976]
[5.725] 145.42
134.12 [5.280]
75.60 [2.976]
UNLESS NOTED OTHERWISE DESCRIPTION: DIMENSIONS ARE IN INCHES TOLERANCES: FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV MATERIAL TWO PLACE DECIMAL 0.01 THREE PLACE DECIMAL 0.005 NAME DATE NOT DRAWN TO SCALE DRAWN BY WEIGHT: SHEET 1 OF 1 SIDEUNLESS NOTED VIEW OTHERWISE DESCRIPTION: DIMENSIONS ARE IN INCHES TOLERANCES: FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV MATERIAL TWO PLACE DECIMAL 0.01 THREE PLACE DECIMAL 0.005 FIG. 16. ELCT5-88NAME and DATEELCT30-88NOT DRAWN ground-fault TO SCALE current sensors. DRAWN BY WEIGHT: SHEET 1 OF 1 55.97 [2.204) 2.41 R[0.095]
Page 22
SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018 46.80 20.64 [1.843] [0.813] 33.72 [1.328]
72.64 [2.860]
31.56 55.97 [1.243] 7.62 [2.204) [ 0.300] 2.41 R[0.095]
55.97 [2.204) 2.41
R[0.095]
46.80 20.64 [1.843] [0.813] 33.72 [1.328]
73.36 [2.888] 46.80 20.64 [1.843] [0.813] 62.28
[2.452] 33.72 [1.328]
36.34 [1.431]
72.64 [2.860]
31.56 [1.243] 7.62 72.64 [ 0.300] DESCRIPTION: [2.860] TOP VIEW AND MOUNTING DETAIL FRONT VIEW UNLESS NOTED OTHERWISE DIMENSIONS ARE IN INCHES TOLERANCES: 31.56 FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV [1.243] 7.62 MATERIAL [ 0.300] TWO PLACE DECIMAL 0.01 THREE PLACE DECIMAL 0.005 NAME DATE NOT DRAWN TO SCALE WEIGHT: SHEET 1 OF 1 NOTES: DRAWN BY
1. DIMENSIONS IN MILLIMETERS [INCHES].
2. MOUNTING SCREWS: M5 OR #10. 73.36 [2.888] 62.28
[2.452]
36.34 [1.431] 73.36 [2.888]
62.28
[2.452]
36.34 [1.431]
UNLESS NOTED OTHERWISE DESCRIPTION: DIMENSIONS ARE IN INCHES TOLERANCES: FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV MATERIAL TWO PLACE DECIMAL 0.01 THREE PLACE DECIMAL 0.005 NAME DATE NOT DRAWN TO SCALE WEIGHT: SHEET 1 OF 1 UNLESS NOTED OTHERWISESIDE VIEWDESCRIPTION: DRAWN BY DIMENSIONS ARE IN INCHES TOLERANCES: FRACTIONAL 1/64 ANGULAR: 1 deg PART NUMBER: REV MATERIAL TWO PLACE DECIMAL 0.01 THREE PLACE DECIMAL 0.005 NAME DATE NOT DRAWN TO SCALE DRAWN BY WEIGHT: SHEET 1 OF 1 FIG. 17. ELCT5-31 and ELCT30-31 ground-fault current sensors. Page 23 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
MILLIMETERS
FIG. 18. RK-332 remote indication and reset.
FIG. 19. PGA-0520 analog percent current meter. Page 24 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
3.4 Isolated Ground Connection An isolated ground bed can prevent a ground potential rise (GPR) from being transferred to remote equipment. If the G terminals on the sensing resistor and the SE-330 are connected to an isolated ground, then the SE-330 will be exposed to the GPR. If the GPR is greater than the terminal-block rating, then the SE-330 must be isolated from station ground and precautions must be taken with the power supply and the trip contacts. See Technical Note RG-1 “NGR Monitoring with Isolated Ground Beds” at www.littelfuse.com/relayscontrols. A configuration that allows an SE-330 to be connected to station ground is shown in Fig. 20. The SE-330 monitors the series combination of the NGR and the two ground beds. This configuration is acceptable provided the series resistance of the NGR and the ground beds is within the NGR calibration range and groundbed-resistance changes remain within the trip range. See Section 6.1.
FIG. 21. Simplified pulsing connection.
FIG. 20. Simplified isolated-ground connection.
3.5 Pulsing Connection Set switch S1 to K1 = PULSING. Use an external switch to use relay K1 to control a pulsing contactor (see Fig. 21). Relays K2 and K3 can be used for tripping, and configured in the fail-safe or non- fail-safe mode with the desired function using the SE-MON330 software. Page 25 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
4. DATA INTERFACES 5. Set switch S8 back to RUN for normal operation. If a firmware 4.1 SD Card upgrade fails, then the existing firmware will not be overwritten. The SE-330 supports microSD data storage. The microSD card A record of the upgrade can be found in “upgrade_log_
NOTE: SE-330 hardware revisions 10 and later include an internal rechargeable battery that powers the real-time clock. Please consult local regulations regarding the use of batteries in electrical equipment. The SE-330 battery is not designed for user service or removal; please contact Littelfuse with any questions regarding battery removal.
4.3 Network Communications The optional communications interfaces include a single CAN port and dual Ethernet ports supporting cable, fiber(1), or both cable and fiber. Protocols include: • DeviceNet over CAN (ordering option 1) • EtherNet/IP cable or fiber (ordering options 3, 4, and 5) • Modbus TCP over cable or fiber (ordering options 3, 4, and 5) • IEC 61850 over cable or fiber (ordering options 6, 7, and 8) See Section 7 and refer to the appropriate SE-330 communications- interface manual for details. (1) Uses the plug-in style SC connector. Page 27 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
5. TROUBLESHOOTING
PROBLEM DIAGNOSTIC LED SOLUTION FLASH CODE(1) POWER LED off. Check if supply voltage is present in terminals 1 and 2. If present, an overvoltage may have caused the power supply to shutdown. Cycle the supply voltage. If POW- ER LED remains off, consult Littelfuse. POWER LED flashes. A power-supply overload has occurred. Cycle supply voltage. If problem persists, consult Littelfuse. Calibration-Error Trip 1 L - 1 S - 1 L The total resistance of the NGR and sensing-resistor circuit is outside the calibration DIAGNOSTIC LED flash code range. Verify that switch S5 is set to match the resistance of the sensing resistor, check the resistance of the NGR, and verify the sensing-resistor circuit. See Section 9.2 for sensing-resistor tests. Repeat the calibration procedure after the open or shorted condition has been corrected. Critical diagnostic code. GF LED(2): No Change; RF LED(2): ON; Assigned Relay: Trip Remote Trip 1 L - 2 S - 1 L The SE-330 was tripped by a signal from network communications. Press RESET DIAGNOSTIC LED flash code to clear the trip. Critical diagnostic code. GF LED(2): ON; RF LED(2): ON; Assigned Relay: Trip A/D-Converter-Error Trip 1 L - 4 S - 1 L An A/D-converter error was detected. Press RESET to clear the trip. If the problem DIAGNOSTIC LED flash code persists, consult Littelfuse. Critical diagnostic code. GF LED(2): No Change; RF LED(2): ON; Assigned Relay: Trip SD Card 1 L - 5 S - 1 L SD card is full or a write error occurred. Delete files or use a different microSD card. DIAGNOSTIC LED flash code Non-critical diagnostic code. GF LED(2): No Change; RF LED(2): No Change; Assigned Relay: No Change If this diagnostic was caused during an attempt to upgrade the firmware, follow this alternative process: • Remove supply from SE-330. • Insert a microSD card containing the firmware upgrade file in the root directory of the SD card. • Power on the SE-330. • Set switch S8 to UPGRADE within 30 seconds of startup. • The upgrade should continue as described in Section 4.1.2. Watchdog Trip 1 L - 6 S - 1 L A watchdog trip results in a processor reset. During reset, UNIT HEALTHY relay DIAGNOSTIC LED flash code K4 will be de-energized. After a reset, UNIT HEALTHY relay K4 will be energized. Press RESET to clear the trip. If the problem persists, consult Littelfuse. Critical diagnostic code. GF LED(2): ON; RF LED(2): ON; Assigned Relay: Trip Non-Volatile Memory 1 L - 8 S - 1 L An error was detected in the non-volatile memory. Press RESET to clear the trip. If Error Trip the problem persists, consult Littelfuse. DIAGNOSTIC LED flash code Critical diagnostic code. GF LED(2): ON; RF LED(2): ON; Assigned Relay: Trip SD Upgrade Error 1 L - 9 S - 1 L An error occurred during the flash-memory upgrade procedure. Ensure that the DIAGNOSTIC LED flash code firmware upgrade file is correct or use a different microSD card. Critical diagnostic code. GF LED(2): No Change; RF LED(2): No Change; Assigned Relay: No Change Page 28 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
PROBLEM DIAGNOSTIC LED SOLUTION FLASH CODE(1) USB Error 1 L - 10 S – 1 L A USB algorithm timeout has been detected. Remove and reconnect the USB cable DIAGNOSTIC LED flash code and cycle supply voltage. If the problem persists, consult Littelfuse. Non-critical diagnostic code. GF LED(2): No Change; RF LED(2): No Change; Assigned Relay: No Change DIAGNOSTIC LED = solid red SE-330 processor failed to start. Cycle supply. If problem persists, consult Littelfuse. K1: De-energized. Pressing RESET does not Trip condition is still present. Locate and correct. clear trips. The RESET button is disabled if remote-reset terminals 15 and 16 are connected. Replace shorted remote-reset switch or issue Reset command from the communications network. UNIT HEALTHY relay K4 Processor has been reset. momentarily changes state No analog-output current. The output at terminals 19 and 20 requires a voltage source. See Fig. 2 for analog-output connections. See Section 9.3 for the analog-output tests.
NOTES: (1) L = long pause, S = short flash. (2) When LED is on, corresponding indication relay is energized when in the non-fail-safe mode or de-energized when in the fail-safe mode. Page 29 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
6. TECHNICAL SPECIFICATIONS NGR Short Detection: 6.1 SE-330 Nominal NGR Resistance...... 15 to 2,000 Ω, 166 Ω Supply: min for 100 kΩ Option 0...... 30 VA, 120 to 240 Vac sensing resistors (+10, -45%), 50/60 Hz; NGR Short Trip Level...... 10 to 70% of the nominal 20 W, 110 to 250 Vdc NGR resistance (+10, -25%) NGR Short Mode...... Monitor only, monitor and Option 2...... 20 W, 48 Vdc trip, disabled (+50, -25%); Accuracy: 35 VA, 48 Vac ER-600VC, ER-5KV, ER-5WP: (+10, -45%), 50/60 Hz 0 to 40°C...... ±5 Ω typical, ±10 Ω max Power-Up Time...... 3 s at 120 Vac -40 to 60°C...... ±12 Ω typical, ±20 Ω max ER-15KV, ER-25KV, ER-35KV: AC Measurements...... Discrete Fourier 0 to 40°C...... ±30 Ω typical, ±50 Ω max Transform. 16 samples -40 to 60°C...... ±60 Ω typical, ±100 Ω max per cycle, 50 or 60 Hz Optimum Calibration Resistor-Fault Circuit: Temperature...... Midpoint of local/installed Neutral-To-Ground Voltage Trip Levels(1): temperature range ER-600VC or ER-5KV...... 20; 60; 100; 130; 170; 200; Ground-Fault Circuit: 340; 800; 1,200; 1,700; Trip Level...... 2, 4, 6, 8, 10, 20, 40, 60, 2,000 Vac 80, 100% of CT-primary ER-15KV to ER-35KV...... 100; 300; 500; 650; 850; rating or 2 to 100% using 1,000; 1,700; 4,000; 6,000; MEM parameter 8,500; 10,000 Vac Trip Time...... 0.1, 0.2, 0.3, 0.4, 0.5, 0.7, Accuracy...... 10% of setting 1.0, 2.0, 3.0, 5.0, 10.0 s 3 dB Frequency Response: Trip-Level Accuracy: S6 = 50 Hz...... 25 to 85 Hz EFCT-x, CS30-x...... max of 1% of CT-primary S6 = 60 Hz...... 30 to 90 Hz rating or 3% of setting(2) NGR Calibration Range: ELCT5-x, ELCT30-x...... max of 1% of CT-primary ER-600VC, ER-5KV, or rating or 5% of setting(2) ER-5WP...... 0 to 2 kΩ Trip-Time Accuracy...... 10% of setting, 20 ms ER-15KV to ER-35KV...... 0 to 10 kΩ min 3 dB Frequency Response: Trip Resistance, VN = 0: ER-600VC, ER-5KV, or S6 = 50 Hz...... 25 to 85 Hz ER-5WP: S6 = 60 Hz...... 30 to 90 Hz Range(5)...... 250 to 750-Ω change Maximum CT lead resistance: ± 200 Ω ELCT5 & ELCT30...... 5 Ω Default...... 500-Ω change Other CTs...... Consult CT curve ER-15KV to ER-35KV: CT-Input Burden: Range(5)...... 1.25 to 3.75-kΩ change 5-A Input ...... < 0.01 Ω ± 1 kΩ 1-A Input...... < 0.05 Ω Default...... 2.5-kΩ change EFCT Input...... < 10 Ω Neutral-To-Ground DC-Voltage Rejection: Thermal Withstand: ER-600VC, ER-5KV, or 1-A and 5-A Inputs: ER-5WP...... 25 Vdc Continuous...... 2 x CT rating ER-15KV to ER-35KV...... 125 Vdc 1-Second...... 20 x CT rating Trip Time...... 12 to 60 s ± 1 s EFCT Input: Trip Hold-Off Level...... 5% of CT-primary rating Continuous...... 10 x CT rating Trip Mode ...... Latching/non-latching 1-Second...... 25 x CT rating Measurement Range...... 25 x CT-primary pating Trip Mode...... Latching/non-latching Pulsing Circuit: Pulse Period...... 1.0 to 3.0 s, 0.2-s increments Page 30 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
Duty Cycle...... 50% Range...... 4 to 22 mA Time Accuracy...... 10% of setting Loop Voltage...... 8 to 36 Vdc Trip/Pulsing Relay K1 Contacts: Load...... 500 Ω (max with Configuration...... N.O. (Form A) 24-Vdc supply) Operating Mode...... Fail-safe or non-fail-safe Isolation...... 120 Vac CSA/UL Contact Ratings...... 8 A resistive 250 Vac, 5 A Parameter...... NGR current, 20 mA = resistive 30 Vdc CT primary current
Supplemental Contact Ratings: USB Communications: Make/Carry 0.2 s...... 30 A Baud Rate...... 12 Mbit/s Break: Protocol...... USB Device dc...... 75 W resistive Connector...... Mini-B 35 W inductive (L/R = 0.004 s) SD Memory Card: ac...... 2,000 VA resistive Type...... Standard grade 1,500 VA inductive Form Factor...... microSD(3) and (PF = 0.4) microSDHC(3) Subject to maxima of 8 A at 250 Vac, 8 A resistive Format...... FAT32 at 30 Vdc, and 0.4 A resistive at 150 Vdc. Capacity: SE-330 Hardware GF (K2) and RF (K3) Relay Contacts: Revision 16 and higher...... 512 MB to 32 GB Configuration...... N.O. and N.C. (Form C) SE-330 Hardware Operating Mode (5)...... Non-fail-safe or fail-safe Revision 15 and lower...... 512 MB to 4 GB CSA/UL Contact Ratings...... 8 A resistive 250 Vac 8 A resistive 30 Vdc Operating Temperature: Supplemental Contact Ratings: Standard Grade Make/Carry 0.2 s...... 30 A (Included)...... -25 to 85°C (-13 to 140°F) Break: Industrial Grade...... -40 to 85°C (-40 to 140°F) dc...... 75 W resistive Real-Time Clock: 35 W inductive Power-Off Operation...... approx. 6 months at 20°C (68°F) (L/R = 0.004 s) Battery included only in hardware revision 10 and higher. ac...... 2,000 VA resistive 1,500 VA inductive Terminal-Block Ratings...... 10 A, 300 Vac, 12 AWG 2 (PF = 0.4) (2.5 mm ) Subject to maxima of 8 A at 250 Vac, 8 A resistive at 30 Vdc, and 0.4 A resistive at 150 Vdc. PWB Conformal Coating...... MIL-1-46058 qualified, UL QMJU2 recognized Unit Healthy Output K4 (Option 0): Mounting Configurations...... Panel mount and optional Configuration...... N.O. (Form A) Surface mount Operating Mode...... Closed when healthy Ratings...... 100 mA, 250 V (ac or dc) Dimensions: Closed Resistance...... 30 to 50 Ω Height...... 213 mm (8.4 in.) Width...... 99 mm (3.9 in.) Unit Healthy Output K4 (Option 1): Depth...... 132 mm (5.2 in.) Configuration...... N.C. (Form B) Operating Mode...... Open when healthy Shipping Weight...... 2.0 kg (4.4 lb) Ratings...... 100 mA, 250 V (ac or dc) Closed Resistance...... 25 to 50 Ω Environment: Operating Temperature...... -40 to 60°C (-40 to 140°F) Auto-reset time...... 2.8 s max Storage Temperature...... -55 to 80°C (-67 to 176°F) Humidity ...... 85% Non-condensing IP Rating...... IP30 4-20-mA Analog Output: Surge Withstand...... ANSI/IEEE C37.90.1-1989 Type...... Self-powered and (Oscillatory and fast transient) Loop-powered Page 31 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
EMC Tests: Voltage Interruption...... IEC 61000-4-11, Verification tested in accordance with IEC 60255-26:2013. IEC 61000-4-29 0% for 10, 20, 30, Radiated and Conducted 50 ms (dc) Emissions...... CISPR 11:2009, 0% for 0.5, 1, 2.5, CISPR 22:2008, 5 cycles (60 Hz) EN 55022:2010 Class A IEC 61000-4-17 Current Harmonics and Level 4, 15% of the rated dc Voltage Fluctuations...... IEC 61000-3-2 and value IEC 61000-3-3 Certification ...... CSA, Canada and United States Class A LR 53428 C Electrostatic Discharge...... IEC 61000-4-2 US ± 6 kV contact discharge UL Listed (direct and indirect) ± 8 kV air discharge
Radiated RF Immunity...... IEC 61000-4-3 Australia 10 V/m, 80-1,000 MHz, 80% AM (1 kHz) 10 V/m, 1.0 to 2.7 GHz, CE, European Union 80% AM (1 kHz)
Fast Transient...... IEC 61000-4-4 FCC Zone B ± 2 kV (power supply port), ± 1 kV (all other ports) To: CSA C22.2 No. 14 Industrial Control Equipment Surge Immunity...... IEC 61000-4-5 UL 508 Industrial Control Equipment Zone B UL 1053 Ground Fault Sensing and Relaying ± 1 kV differential mode Equipment ± 2 kV common mode Australia, Regulatory Compliance Mark (RCM) CE Low Voltage Directive Conducted RF Immunity...... IEC 61000-4-6 IEC 61010-1:2010 (3rd Edition) + AMD 1:2016 10 V, 0.15-80 MHz, FCC CFR47, Part 15, Subpart B, 80% AM (1 kHz) Class A – Unintentional Radiators Compliance...... RoHS Compliant Magnetic Field Immunity...... IEC 61000-4-8 NOTES: 50 Hz and 60 Hz (1) See sensing resistor specifications for applicable voltage limits. 30 A/m and 300 A/m (2) Accuracy included for EFCT-x, SE-CS30-x, ELCT5-x, and ELCT30-x current sensors only. Power Frequency(4)...... IEC 61000-4-16 (3) microSD and microSDHC are trademarks of SD-3C, LLC. Zone A: differential mode (4) Remote-reset and pulse-enable wiring is limited to 10 m (32 ft). 100 Vrms (5) This value can only be modified using SE-MON330 software. See Zone A: common mode Section 4.2. 300 Vrms 6.2 Sensing Resistors 1 MHz Burst...... IEC 61000-4-18 Environment: ± 1 kV differential mode Operating Temperature...... -40 to 60°C (-40 to 140°F) (line-to-line) Storage Temperature...... -55 to 80°C (-67 to 176°F) ± 2.5 kV common mode Extended Operating Temperature...... -55 to 60°C (-67 to 140°F)(1) Page 32 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
ER-600VC: ER-35KV: Maximum Voltage...... 600 Vac Maximum Voltage...... 22,000 Vac Maximum Current...... 30 mA Maximum Current...... 220 mA Resistance...... 20 kΩ Resistance ...... 100 kΩ Thermal: Thermal: 420 Vac...... Continuous 22,000 Vac...... 1 minute on, 600 Vac...... 6 minutes on, 120 minutes off 60 minutes off 3,000 Vac...... Continuous Shipping Weight...... 300 g (0.7 lb) Torque (Terminal N) ...... 9.0 N•m (80 lbf•in.) Shipping Weight...... 40 kg (88 lb) ER-5KV: Maximum Voltage...... 2,500 Vac Certification ...... CSA, Canada and United States
Maximum Current...... 125 mA LR 53428 Resistance...... 20 kΩ C US Thermal...... Continuous UL Listed Torque: Terminal N: 10-32 Insert...... 5.6 N•m (50 lbf•in.) Others...... 9.0 N•m (80 lbf•in.) Australia Shipping Weigh...... 5.0 kg (11 lb)
ER-5WP: CE, European Union Maximum Voltage...... 2,500 Vac Maximum Current...... 125 mA Resistance...... 20 kΩ NOTES: Thermal...... Continuous (1) Electrical specifications have been verified at a Littelfuse lab. Torque: Terminal N: 6.3 Current Sensors 10-32 Insert...... 5.6 N•m (50 lbf•in.) Environment: Others...... 9.0 N•m (80 lbf•in.) Operating Temperature...... -40 to 60°C (-40 to Shipping Weight...... 5.0 kg (11 lb) 140°F) ER-15KV: Storage Temperature...... -55 to 80°C (-67 to Maximum Voltage...... 8,400 Vac 176°F) Maximum Current...... 84 mA Compliance...... RoHS, Resistance...... 100 kΩ IEC 61869-2 Thermal: ANSI/IEEE C57.13 8,400 Vac...... 1 minute on, EFCT-1: 120 minutes off Current Ratio...... 5:0.05 A 1,900 Vac...... Continuous Insulation...... 600-V Class Window Diameter...... 82 mm (3.2”) Torque (Terminal N)...... 9.0 N•m (80 lbf•in.) Shipping Weight...... 5.0 kg (11 lb) Shipping Weight...... 0.9 kg (2.0 lb) Certifications...... CSA, UL, CE ER-25KV: Compliance...... RoHS, IEC 60044-1 Maximum Voltage...... 14,400 Vac Extended Operating Maximum Current...... 144 mA Temperature...... -55 to 60°C (-67 to (1) Resistance ...... 100 kΩ 140°F) Thermal: Supplemental 14,400 Vac...... 1 minute on, Specifications: 120 minutes off Trip Level Accuracy: 2,500 Vac...... Continuous ≤ 1 A...... 1% of CT-Primary Rating Torque (Terminal N)...... 9.0 N•m (80 lbf•in.) > 1 A...... 3% of CT-Primary Rating Shipping Weight...... 20 kg (44 lb) Page 33 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
EFCT-26: Extended Operating Current Ratio...... 5:0.05 A Temperature...... -55 to 60°C (-67 to Insulation...... 600-V Class 140°F) (1) Window Diameter...... 26 mm (1.0”) Shipping Weight...... 0.45 kg (1.0 lb) SE-CS30-26: Certifications...... CSA, UL, CE Current Ratio...... 30:0.05 A Compliance...... RoHS, IEC 60044-1 Insulation...... 600-V Class Extended Operating Window Diameter...... 26 mm (1.0”) Temperature ...... -55 to 60°C (-67 to Shipping Weight...... 0.45 kg (1.0 lb) (1) 140°F) Certifications...... CSA, UL, CE Supplemental Compliance...... RoHS, IEC 60044-1 Specifications: Extended Operating Trip Level Accuracy: Temperature...... -55 to 60°C (-67 to ≤ 1 A...... 1% of CT-Primary Rating 140°F)(1) > 1 A...... 3% of CT-Primary Rating SE-CS30-70: Current Ratio...... 30:0.05 A ELCT30-31: Insulation...... 600-V Class Current Ratio...... 30:0.05 A Window Diameter...... 70 mm (2.7”) Insulation...... 600-V Class Shipping Weight...... 1.2 kg (2.5 lb) Window Diameter...... 31 mm (1.22 in.) Certifications...... CSA, UL, CE Shipping Weight...... 0.45 kg (1 lb) Compliance...... RoHS, IEC 60044-1 Certifications...... cUL, CE Extended Operating Temperature...... -55 to 60°C (-67 to ELCT30-88: 140°F)(1) Current Ratio...... 30:0.05 A Insulation...... 600-V Class (1) Electrical specifications have been verified at a Littelfuse Window Diameter...... 88 mm (3.46 in.) lab. Shipping Weight...... 0.91 kg (2 lb) Certifications...... cUL, CE
ELCT5-31: Current Ratio...... 5:0.05 A Insulation...... 600-V Class Window Diameter...... 31 mm (1.22 in.) Shipping Weight...... 0.45 kg (1 lb) Certifications...... cUL, CE
ELCT5-88: Current Ratio...... 5:0.05 A Insulation...... 600-V Class Window Diameter...... 88 mm (3.46 in.) Shipping Weight...... 0.91 kg (2 lb) Certifications...... cUL, CE
CT200: Current Ratio...... 200:5 A Insulation...... 600-V Class Window Diameter...... 56 mm (2.2 in.) Shipping Weight...... 1 kg (2.2 lb) Certifications...... CSA, UL Compliance...... RoHS Page 34 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
7. ORDERING INFORMATION CT200...... Current sensor, 200-A-primary rating, SE-330- - 56-mm (2.2 in.) window K4 Contact: 5SHT-101-E...... Current sensor, 0 N.O. UNIT HEALTHY Contact 100-A-primary rating, 1 N.C. UNIT HEALTHY Contact 40-mm (1.6 in.) window 5SHT-151-E...... Current sensor, Options: 150-A-primary rating, 0 No Options 40-mm (1.6 in.) window Network Communications:(1) 5SHT-500-E...... Current sensor, 0 None 50-A-primary rating, 1 DeviceNet™ 40-mm (1.6 in.) window (2) 3 Ethernet (Dual RJ45) 7SHT-301-E...... Current sensor, (2) 4 Ethernet (SC fiber & RJ45) 300-A-primary rating, (2) 5 Ethernet (Dual SC fiber) 64-mm (2.5 in.) window 6 IEC 61850 (Dual RJ45) 7SHT-401-E...... Current sensor, 7 IEC 61850 (SC fiber & RJ45) 400-A-primary rating, 8 IEC 61850 (Dual SC fiber) 64-mm (2.5 in.) window Supply: 0 Universal ac/dc supply Accessories: 2 48 Vdc supply RK-332...... Remote indication and reset, includes two 120-V pilot NOTE: Please refer to the SE-330 Product Change Notice (PCN) lights, a reset push button, document for updated ordering information and new revision and legend plates details, available at www.littelfuse.com/se-330. SE-IP65CVR-G...... Hinged transparent cover, IP65 SE-MRE-600...... Moisture-resistant NOTE: The SE-330-SMA surface mount adapter is available as an enclosure for ER-600VC accessory only. PGA-0520...... Percent analog meter SE-330-SMA...... Surface mount adapter Sensing Resistors: AC300-MEM-00...... Industrial-grade ER-600VC...... For system voltages up to microSD card 1 kVac ER-5KV...... For system voltages up to Software:(4) 5 kVac SE-MON330 Software...... SE-330 Data-display ER-5WP...... For system voltages up to Program for PC, version 5 kVac, weather protected 4.0 or higher ER-15KV...... For system voltages up to NGR Monitor 15 kVac Set-Point Assistant...... SE-330 settings guide ER-25KV ...... For system voltages up to 25 kVac NOTES: ER-35KV...... For system voltages up to (1) Profibus models only available on legacy SE-330. 35 kVac (2) Includes Modbus TCP and EtherNet/IP protocols. (3) Includes IEC 61850 protocol only. Current Sensors: (4) Available at www.littelfuse.com/relayscontrols. ELCT5-31...... Current sensor, 31-mm (1.22 in.) window ELCT5-88...... Current sensor, 88-mm (3.46 in.) window ELCT30-3...... Current sensor, 31-mm (1.22 in.) window ELCT30-88...... Current sensor, 88-mm (3.46 in.) window Page 35 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
8. WARRANTY NOTE: Resistor-fault-trip reset can take up to one second.
The SE-330 Neutral-Grounding-Resistor Monitor is warranted to 9.1.2 Voltage Test be free from defects in material and workmanship for a period of five years from the date of purchase. Test Equipment: 0 to 120 Vac voltage source, multimeter, and ER sensing resistor. Littelfuse will (at the choice of Littelfuse) repair, replace, or refund the original purchase price of an SE-330 that is determined NOTE: Use an isolation transformer if the test-voltage source by Littelfuse to be defective if it is returned to Littelfuse, freight does not provide dc continuity for the SE-330 resistance-measuring prepaid, within the warranty period. This warranty does not apply circuit. to repairs required as a result of misuse, negligence, an accident, improper installation, tampering, or insufficient care. Littelfuse NOTE: Applying the test voltage to the R and G terminals will does not warrant products repaired or modified by non-Littelfuse damage the SE-330 and the ER sensing resistor. The VN TRIP LEVEL personnel. is the trip voltage at terminal N, not terminal R.
9. TEST PROCEDURES Procedure: NOTE: Ensure the real-time clock is set. See Section 4.2. • Connect the ER sensing resistor to the SE-330 and calibrate the SE-330. 9.1 Resistor-Fault Tests • Disconnect the wire from sensing-resistor terminal N. A Perform tests with system de-energized and supply voltage resistor-fault trip will occur. applied to the SE-330. • Set the voltage source to 0 V. • Connect the voltage source between sensing resistor N and 9.1.1 Calibration and Open Test G terminals. Test Equipment: 20-kΩ and 100-kΩ, ¼-watt, 1% • Set the V TRIP LEVEL (VAC) to 20. calibration resistors (calibration resistors N are supplied with SE-330). • Press RESET. Procedure: • The RESISTOR FAULT TRIP LED should be off. • Remove connections to terminals 6 and 7. • Increase the test voltage to 25 Vac for 20-kΩ sensors or 120 • Connect the 20-kΩ resistor to terminals 6 and 7. Vac for 100-kΩ sensors and wait for the resistor-fault trip time. • Set switch S5 to the 20-kΩ position. PASS: The SE-330 should trip on RESISTOR FAULT. A time • Perform calibration as per Section 2.2. delayed ground-fault trip follows the resistor-fault trip if • The CALIBRATED LED should be on. neutral voltage persists after the resistor fault. For legacy units with firmware revision 6 or less, this does not apply. • Press RESET. • Remove the 20-kΩ resistor and wait for the resistor-fault trip 9.2 Sensing-Resistor Test time. Test Equipment: Multimeter PASS: The SE-330 should trip on resistor fault. Procedure: • Connect the 100-kΩ resistor to terminals 6 and 7. • Disconnect the sensing resistor. • Set switch S5 to the 100-kΩ position. • Measure the resistance between sensing-resistor terminals R • Perform calibration as per Section 2.2. and N. • The CALIBRATED LED should be on. PASS: Resistance should be between 19.6 and 20.4 kΩ for 20-kΩ sensing resistors. Resistance should be between 98 • Press RESET. and 102 kΩ for 100-kΩ sensing resistors. • Remove the 100-kΩ resistor and wait for the resistor-fault trip • Measure the resistance between sensing-resistor terminals R time. and G in both directions. PASS: The SE-330 should trip on resistor fault. PASS: Resistance should be greater than 10 MΩ in both directions. Page 36 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
9.3 Analog-Output Test NOTE: Do not inject test current directly into CT-input terminals 8, 9, 10, and 11. Test Equipment: multimeter with an mAdc scale. Procedure: NOTE: For accurate trip-time measurement, the fault current should not be re-applied for the time defined by the GF TRIP TIME setting to • Connect the 4-20-mA output as a self-powered output (see Fig. allow the trip accumulator to initialize. 3). Measure the current from terminal 20 to terminal 21. PASS: With no CT current, the analog output should be 4 mA. • Output is linear to 20 mA. output is 20 mA when CT-primary current is equal to the CT-primary rating.
9.4 Ground-Fault Performance Test To meet the requirements of the National Electrical Code*, the overall ground-fault protection system requires a performance test when first installed (as applicable). A written record of the performance test must be retained by those in charge of the electrical installation in order to make it available to the authority having jurisdiction. A test-record form is included for recording the date and the final results of the performance tests. The following ground-fault system tests are to be conducted by qualified personnel: • Evaluate the interconnected system in accordance with the overall equipment manufacturer’s detailed instructions. • Verify proper installation of the ground-fault current sensor. Ensure the cables pass through the ground-fault-current- sensor window. This check can be visually conducted with knowledge of the circuit. The connection of the current-sensor secondary to the SE-330 is not polarity sensitive. • Verify that the system is correctly grounded and that alternate FIG. 22. Ground-fault-test circuits. ground paths do not exist that bypass the current sensor. TABLE 3. Ground-fault-test record High-voltage testers and resistance bridges can be used to determine the existence of alternate ground paths. DATE TEST RESULTS • Verify proper reaction of the circuit-interrupting device in response to a simulated or controlled ground-fault current. To simulate ground-fault current, use CT-primary current injection (does not apply for bushing-type CTs). Fig. 22a shows a test circuit using an SE-400 Ground-Fault-Relay test unit. The SE- 400 has a programmable output of 0.5 to 9.9 A for a duration of 0.1 to 9.9 seconds. Set the test current to 120% of GF TRIP LEVEL. Fig. 22b shows a test circuit using an SE-100T Ground- Fault-Relay Tester. The SE-100T provides a test current of 0.65 or 2.75 A for testing 0.5- and 2.0-A trip levels. Inject the test current through the current-sensor window for at least 2.5 seconds. Verify that the circuit under test has reacted properly. Correct any problems and re-test until the proper reaction is verified. Record the results and date of each test on the attached test- record form. Retain this record for the authority having jurisdiction. Page 37 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
APPENDIX A SE-330 REVISION HISTORY
MANUAL RELEASE PRODUCT REVISION MANUAL REVISION FIRMWARE VERSION DATE (REVISION NUMBER ON PRODUCT LABEL)
3.00 June 30, 2018 11-A-063018 17A 2.60 October 18, 2017 10-P-101817 17 2.60 December 7, 2016 10-N-120716 2.55 2.54 September 21, 2016 10-M-092116 16 2.53 June 30, 2016 10-L-063016 2.52 September 8, 2015 10-K-090815 June 22, 2015 10-J-062215 2.50 15 May 20, 2015 10-I-052015 2.40 March 3, 2015 10-H-030315 2.31 July 7, 2014 10-G-070714 14 2.30 April 14, 2014 10-F-041414 13 12 2.20 January 8, 2014 10-E-010814 11 November 29, 2013 10-D-112913 2.10 October 8, 2013 10-C-100813 10A 2.08 September 12, 2013 10-B-091213 2.07 August 30, 2013 10-A-083013 10 2.07
MANUAL REVISION HISTORY REVISION 11-A-063018 GENERAL Manual format and many sections have been updated. SECTION 1 Descriptions for NGR short detection and assignable relays added. SECTION 2 Enhanced health status added. SECTION 6 NGR short detection specifications added. REVISION 10-P-101817 SECTION 2 New features described in Section 2.8. SECTION 3 Installation instruction updated. SECTION 4 SD Card note added. SECTION 5 Troubleshooting information added. SECTION 7 Ordering information updated. REVISION 10-N-120716 APPENDIX A Revision history updated. Page 38 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
REVISION 10-M-092116 SECTION 4 Firmware upgrade instructions updated. APPENDIX A Revision history updated. REVISION 10-L-063016 SECTION 4 Section 4.1.2 updated. SECTION 6 microSD storage capacity increased to 32 GB. RCM certification added. REVISION 10-K-090815 SECTION 4 Section 4.1.2 updated. SECTION 5 SD card diagnostic troubleshooting updated. REVISION 10-J-062215 SECTION 2 Section 2.1.7 added. SECTION 4 SD card approximate annual data logging usage updated. SE-MON330 software version updated. SECTION 6 Resistor-fault trip level ranges added. REVISION 10-I-030315 SECTION 4 SD card storage capacity updated. SECTION 6 SD card storage capacity specification updated. REVISION 10-H-030315 SECTION 2 Sections 2.1.6 and 2.1.7 added. SECTION 4 Section 4.2 new features added. SECTION 6 Resistor-fault circuit trip time update REVISION 10-G-070714 SECTION 6 Added CE, C-Tick, and FCC information. REVISION 10-F-041414 APPENDIX A Hardware revision updated. REVISION 10-E-010814 SECTION 6 Extended operating temperatures added to all sensing resistors and SE-CS30 current sensors. REVISION 10-D-112913 SECTION 6 CE added to sensing resistors. SECTION 7 Ordering information updated. REVISION 10-C-100813 SECTION 2 Section 2.8 updated. SECTION 4 Real-time clock note added in Section 4.2. Page 39 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
SECTION 5 LED and relay status added to troubleshooting solutions. SECTION 7 Ordering information updated. REVISION 10-B-091213 APPENDIX A Hardware revision updated. REVISION 10-A-083013 SECTION 1 Faceplate updated. New features added. SECTION 2 Communications options updated. Configuration switches updated. Indication relays explanation added. Non-volatile-memory error added. SECTION 3 Connection drawing updated. SECTION 4 Section heading changed to Data Interfaces. Updated with microSD and USB interfaces. Upgrade procedure added. SECTION 5 Non-volatile-memory error added. Switch S8 diagnostic LED error removed. SECTION 6 Ground-fault circuit trip level updated. USB communications specifications added. Resistor-fault accuracy changed. microSD memory card specifications added. SECTION 7 Ordering information updated. SE-330-SMA surface mount adapter listed as an accessory only. APPENDIX A Added revision history.
HARDWARE REVISION HISTORY HARDWARE REVISION 17A Additional EMC filter capacitors added. HARDWARE REVISION 17 Enhanced transient protection added. HARDWARE REVISION 16 microSD storage capacity increased to 32 GB. HARDWARE REVISION 15 RTC circuit updated. HARDWARE REVISION 14 CE and C-Tick compliance added. HARDWARE REVISION 13 ESD sensitivity of front-panel dials reduced HARDWARE REVISION 12 Fiber ethernet support improved. HARDWARE REVISION 11 ESD sensitivity of USB and SD card connectors reduced. HARDWARE REVISION 10A RTC circuit updated. Page 40 SE-330 Neutral-Grounding-Resistor Monitor Rev. 11-A-063018
HARDWARE REVISION 10 SE-330 platform updated to include USB and microSD interfaces, programmable trip level (MEM) feature, and ability to add future options. Real-time clock and rechargeable battery added. Dual cable and fiber Ethernet ports added.
FIRMWARE REVISION HISTORY FIRMWARE REVISION 3.00 NGR short detection functionality added. Assignable functions for K1, K2, and K3 added. Standard and non-accumulating selections added to ground-fault trip time algorithm. UTC Offset added to SNTP Client functionality. SD card logging limited to two most recent months of data. FIRMWARE REVISION 2.60 Option to display only critical diagnostic codes with DIAGNOSTIC LED added. FIRMWARE REVISION 2.55 IEC 61850 network watchdog resets corrected. FIRMWARE REVISION 2.54 NAND FLASH bit-error-correction update to prevent solid-red diagnostic LED error when bit errors are correctable. Resistor-fault trip level added to web interface. MODBUS TCP/IP write response byte count corrected. TCP Keep Alive network setting no longer resets to 5 s after power cycle. FIRMWARE REVISION 2.53 NAND FLASH bit error correction code to prevent solid-red diagnostic error fixed. FIRMWARE REVISION 2.52 Improved compatibility with Internet Explorer* web browser. FIRMWARE REVISION 2.50 Support for adjustable resistor-fault trip level added. Web page functionality re-enabled for Ethernet options. FIRMWARE REVISION 2.40 Support for geo-magnetic filter added. Support for 12 to 60 s resistor-fault trip time added. Improved log file descriptions. IEC 61850 GOOSE network input support now always enabled. Improved compatibility for Modbus TCP. Web page disabled for Ethernet options. This will be enabled in a future firmware release. IP setting changes for Ethernet options now require power cycle to take effect. FIRMWARE REVISION 2.31 SD card and USB diagnostic events no longer cause a trip. FIRMWARE REVISION 2.30 Remote calibration feature added. FIRMWARE REVISION 2.20 Added support for Ethernet/IP protocol. IED name now reported correctly through IEC 61850 interface. Ethernet/IP and Modbus communications card LED status updated. Hardware version viewable in the SE-MON330 software and through the MODBUS and IEC 61850 servers. FIRMWARE REVISION 2.10 Added support for IEC 61850 and DeviceNet protocols. FIRMWARE REVISION 2.08 Added support for communications options. FIRMWARE REVISION 2.07 Updated firmware to include USB and microSD interfaces, datalogging, and firmware update via microSD. K2 and K3 indication relays can be configured for fail-safe or non-fail-safe operation. Trip records increased to 100 with date and time stamping.
* Bluetooth, Internet Explorer, National Electric Code, and microSD are trademarks of their respective owners.