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KFE and KFVE Recloser Instructions

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KFE and KFVE Recloser Instructions Reclosers Service Information Type KFE and KFVE Electronically Controlled Vacuum Recloser Installation Instructions KFE10002-E CONTENTS Shipment and Acceptance ............. 2 Handling and Storage ..................... 2 Description ...................................... 2 Recloser .......................................... 2 Vacuum Interruption ........................ 2 Electronic Control ............................ 3 Ratings and Specifications .............. 3 Dimensions and Weights ................. 4 Operating Levers and Indicators... 4 Manual Operating Handle ............ 4 Non-Reclosing Lever .................... 4 Contact-Position Indicator ............ 4 Operations Counter ...................... 4 Ground-Trip Disabling Switch........ 5 Closing Solenoid ............................. 6 Closing Solenoid Operation ......... 6 Low Energy Tripper ...................... 7 Adjustments ..................................... 8 Operations to Lockout ..................... 8 Number of Fast Operations ............. 8 Sequencing Mechanism................... 8 Phase-Trip Sequence ................... 8 Ground-Trip Sequence ................. 8 Reclosing Time ................................ 9 Reset Time....................................... 9 Electronic Control ........................... 9 Figure 1. 82049KMA Current Sensing ..............................10 Type KFE recloser combines vacuum interruption with hydraulic counting and Minimum-Trip Selection ...................10 electronic fault sensing and trip timing. Time-Current Trip Characteristics .............................10 In-Service Recloser Operation ........19 Recloser Accessories ......................22 Phase-Trip Timing Cards ..............10 Testing ..............................................19 Extra Creepage Bushings ................22 Ground-Trip Timing Cards.............10 Test Equipment Required ................20 Bushing Type Multi-Ratio Control Power ..................................12 Test Procedures—Electrical Current Transformers ....................22 Installation .......................................12 Closing ........................................20 Bushing Current Transformer Preliminary Checks .........................12 Operation of Closing Connections ..................................23 Oil Level .......................................12 Solenoid ...................................20 Accessory-Connection Recloser .......................................12 Phase Minimum-Trip Current........21 Junction Box ..................................23 Electronic Control .........................12 “A” Phase .................................21 Auxiliary Switch ...............................24 Vacuum Interrupters......................12 “B” Phase ..................................21 Lockout-lndicating Switch ................24 Lifting ..............................................13 “C” Phase ..................................21 Remote-Trip .....................................25 Mounting .........................................14 Ground Minimum-Trip Remote-Lockout ..............................25 Direct Mounting ............................14 Current .....................................21 Remote-Close ..................................25 Pole Mounting ..............................15 Operating Sequence and Low-Voltage Closing ........................26 Substation Elevating Reclosing Time—Phase ...........21 Control Accessories ........................26 Structure ....................................16 Operating Sequence and Instantaneous Trip ...........................26 Main Wiring Connections For Reclosing Time—Ground .........21 Fault-lndicator Target .......................27 Installation .......................................17 Operation of Non-Reclosing Bypass Switches .............................17 Lever ........................................21 Surge Protection .............................18 Test Procedures—Manual RADIATION Grounding .......................................18 Closing ........................................22 N WARNING High Voltage ....................................18 Phase Minimum-Trip Current .......22 Placing Recloser in Service ...........18 “A” Phase ..................................22 Manual Operation of Energized “B” Phase .................................22 Before performing electrical tests on Recloser .......................................18 “C” Phase .................................22 types KFE and KFVE Reclosers, refer Manual Operation of De-energized Ground Minimum-Trip to Service Information S280-90-1, "Vacuum Interrupters Radiation Recloser .......................................18 Current .....................................22 Non-Reclosing Operation ................19 Warning". These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide direction for meeting every possible contingency during installation, operation, or maintenance. When additional information is desired to satisfy a problem not covered sufficiently for the user’s purpose, please contact your Cooper Power Systems sales engineer. December 1992 • Supersedes 7/86 1 Recloser The KFE and KFVE Reclosers employ a CAUTION simple time-proven hydraulic mechanism to Do not energize this equipment out of The Type KFE Recloser is a self-contained, oil. three-phase current interrupting device. count operations, program the operating KFE reclosers protect systems rated 2.4 sequence, and determine reclosing time. through 14.4 kV, KFVE reclosers 2.4 Solid state electronics provide the accuracy, SHIPMENT through 24.9kV, both are rated at 400 amps reliability, and flexibility for overcurrent sens- AND ACCEPTANCE maximum continuous and 8000 amps sym- ing and trip timing. The electronic circuits metrical interrupting. The KFE and KFVE Each KFE or KFVE recloser is complete- are housed in a separate cabinet attached Reclosers sense both line current and zero- to the recloser tank and connected to the ly assembled, tested, and inspected at sequence ground (earth) current and auto- recloser with a six-foot cable. the factory. It is carefully calibrated, matically interrupts all three phases of the adjusted and filled to the correct level distribution circuit to which it is connected with insulating oil. It is in good condition when any current exceeds the minimum- Vacuum Interruption when accepted by the carrier for ship- trip level. It automatically recloses to restore Arc interruption takes place within the three ment. service if the fault is temporary. If the fault is sealed vacuum interrupters. Oil is used for 1. Upon receipt, inspect the recloser permanent the recloser locks out after two, electrical insulation, but is not involved in arc thoroughly for damage and loss of three or four preset trip operations. Once interruption. The insulating oil is also used in parts or oil incurred during shipment. locked-out, the recloser must be manually the counting and sequencing mechanism reset to restore service. Should the fault If damage or loss is discovered, file a and in reclose timing. claim with the carrier immediately. clear before lockout, the recloser will reset automatically for another sequence of oper- The moving contacts in the vacuum inter- 2. Check for oil leakage and tighten all ations. rupters are driven by the release of opening bolts that may have loosened during The recloser can be also set for nonre- springs. A low energy tripper actuated by the shipment, especially the bolts which closing operation (lockout after the first trip electronic circuitry releases the opening attach the head to the tank. operation) with a manually operated exter- spring when line current is sensed above the nal non-reclosing lever. preset minimum-trip level. Closing energy, HANDLING AND STORAGE The trip operations of the recloser can be as well as energy to charge the opening If the recloser is to be stored for some all fast, all delayed, or any combination of spring, is supplied by a high-voltage closing time before installation, provide a clean, fast operations followed by delayed opera- solenoid momentarily connected phase-to- dry storage area. Take precautions dur- tions up to a maximum total of four. Fast phase through a high-voltage contactor. operations clear temporary faults before ing handling and storage to minimize the branch line fuses are damaged. Delayed possibility of mechanical damage; in par- operations allow time for fuses or other ticular, protect the bushings and control downline protective devices to clear to limit equipment. permanent faults to the smallest section of line. DESCRIPTION A complete Type KFE or KFVE Recloser assembly consists of a KFE or KFVE recloser and a separate control cabinet connected to the recloser with a 6-foot- long control cable. The control cabinet is designed to be mounted to the recloser tank, however it can be mounted to the pole or other mounting structure at a dis- tance equal to the cable length. The con- trol cable is hard-wired to the recloser and attached to the control with a thread- ed, separable weatherproof connector. 83490KMA Figure 2. KFE electronic control. 2 KFE10002-E Electronic Control Table 2 Table 3 The electronic circuits and the plug-in Current Ratings Interrupting Ratings Minimum Trip Maximum interrupting units for programming minimum-trip and Maximum continuous current trip timing are located in a separate cabi- Current Current (amps) ............................................ 400 (amps) (rms symmetrical amps) net
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