Circuit Breakers Selection Guide

Circuit Breakers Selection Guide...... N-2 Section NRA Series...... N-3 NRBM Series ...... N-13

NRC Series...... N-20

General Instructions ...... N-29 N Internal Circuit Overview ...... N-29 www.idec.com/circuitbreaker

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Selection Guide Circuit Breakers

Selection Guide

Selection Guide: NRA Series Series Model NRA NRBM NRC Page N-3 N-13 N-20

Appearance

Lever and Actuator Style Rocker (non-illuminated Lever Slide, lever and illuminated) Lever: 1, 2, 3 Number of Poles Rocker: 1 1, 2, 3 1, 2 Protection Method Electromagnetic trip Electromagnetic trip Internal Circuits Series current trip Series current trip Series current trip Auxiliary Contact Optional (250V AC, 5A; 50V DC, 1A) Optional (250V AC, 5A; 50V DC, 1A) Alarm Contact Optional (250V AC, 5A; 50V DC, 1A) Optional (250V AC, 5A; 50V DC, 1A) Optional (for resistance to high Optional (for resistance to high Inertia Delay inrushes) inrushes) — Time Delay Curves 2 types for DC; 3 types for AC 2 types for DC; 3 types for AC 2 types for DC; 2 types for AC Rated Voltage 250V AC, 50/60Hz, 65V DC 250V AC, 50/60Hz, 65V DC 0.3A, 0.5A, 0.75A Rated Tripping Currents 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 0.3A, 0.5A, 0.75A, 1A, 2A, 3A, 5A, 7.5A, 10A, 25A, 30A 25A, 30A, 40A, 50A 15A, 20A, 25A, 30A 2,500A, 220V AC 50/60Hz (1-pole) 1,500A, 220V AC 50/60Hz (2-pole) Rated Interruption Capacity 1,000A, 250V AC, 50/60Hz, 65V DC 1,000A, 250V AC (50/60Hz), 65V DC 1,500A, 65V DC (1-pole) 1,000A, 65V DC (2-pole) Lever: UL, c-UL, VDE Approvals Rocker: UL UL, c-UL, VDE UL, CSA N 1. For dimensions, see end of each section. 2. UL recognized, applicable standard: UL1077, “Supplementary Protectors.” 3. Not suitable for branch circuit protection.

. Circuit Breakers

File No. LR83454 UL Recognized NRA/NRBM series only File No. E68029 NRC Series license #116381/113434

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Circuit Breakers NRA Series

NRA Series

Key features of the NRA series include: • Available in 4 different styles • Excellent overload and short circuit protection • Small size and high-efﬁciency • Life expectancy of over 10,000 operations • UL1077 recognized “Supplementary Protectors” • VDE certiﬁed to EN60934

NRAS NRAN File No. E68029

license #116381

NRAR NRAR Rocker Illuminated Rocker (neon lamp)

Protection Method Electromagnetic tripping Internal Circuit Series current trip NRAS and NRAN: 1, 2, 3 Number of Poles NRAR: 1 Rated Voltage 250V AC, 50/60Hz, 65V DC 0.3A, 0.5A, 0.75A Rated Tripping Currents 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A 250V AC, 50/60Hz, 1,000A Rated Interrupting Capacity 65V DC, 1,000A Auxiliary Contact SPDT microswitch 250V AC, 5A (resistive load) Alarm Contact 50V DC, 1A (resistive load) Reference Temperature 25°C Operating Temperature –40 to +85°C (avoid freezing) 100MΩ minute (measured with 500V megger) Specifications Insulation Resistance Between main circuit terminals: 2,000V AC, 1 minute Dielectric Strength Between main circuit and auxiliary contact: 2,000V AC, 1 minute Vibration Resistance 100N (approximately 10G) (10 to 100Hz) Shock Resistance 1,000N (approximately 100G) Life Expectancy Minimum 10,000 cycles (at 6 operations per minute) Main terminal: Quick-connect receptacle 0.250" (accepts M3.5 screw terminal adapter) Termination Auxiliary contact, alarm contact: Quick-connect receptacle 0.080" N

Illumination Voltage Circuit Breakers Neon: 120, 240V AC, 50/60Hz (NRAR illuminated units)

Not suitable for branch circuit protection.

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NRA Series Circuit Breakers

Part Numbering Guide

NRA series part numbers are composed of up to 8 part number codes. When ordering an NRA series part, select one code from each category. Example: NRAR 1 1 11 -F - 30A -AA -31

NRAR 1 1 11 F 30A AA 1

➀ Model ➁ Poles ➂ Internal ➃ Auxiliary and ⑤ Inertia ➅ Rated Current ➆ Time Delay ⑧ Pilot Circuit Alarm Contacts Delay Curve Light *

Part Number Codes: NRA Series Description Part Number Code Remarks Toggle (round cutout) NRAS ➀ Model Toggle (rectangular cutout) NRAN Rocker NRAR 1-pole 1 NRAR available in 1-pole only. ➁ All multi-pole circuit breakers are simultaneous No. of Poles 2-pole 2 throw/simultaneous break. 3-pole 3 All levers are mechanically interlocked. ➂ Internal Circuit Series current trip 1 Without 00 ➃ Auxiliary and With auxiliary contact 11 Auxiliary contact switches change state with lever and/or overload Alarm Contacts condition With alarm contact 21 Alarm contact switches change state only with overload condition Without inertia delay Blank ⑤ Inertia Delay With inertia delay F 0.3A, 0.5A, 0.75A, 1A, ➅ Rated Current Rated current (current trip) 2A, 3A, 5A, 7.5A, 10A, All current ratings must be listed in amps (A). 15A, 20A, 25A, 30A Example conversion: 300mA = 0.30A. ➆ Time Delay DC curves AD, MD For time delay curves, see page N-7. Curve AC curves AA, BA,MA With neon light 120V AC (50/60Hz) 1 ⑧ Pilot Light* * Applicable to illuminated NRAR only. With neon light 240V AC (50/60Hz) 2

1. For NRA series accessories, see page N-6. 2. For NRA series time delay curves, see page N-7. 3. For NRA series dimensions, see page N-10. 4. Not suitable for branch circuit protection. 5. UL recognized, applicable standard: UL1077, “Supplementary Protectors.”

N Circuit Breakers

N-4 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com

Circuit Breakers NRA Series

Information About Circuit Breakers

Time Delay Curve Descriptions Time Delay Curve NRA Application AD, AA Common curves used in molded-case circuit breakers. Response to overcurrent is quite fast. Suited for protection of semiconductor circuits with BA very little overload tolerance. If overcurrents are expected to ﬂow, fuses may be required according to the circuit characteristics. MD, MA Suited for motor loads that draw high inrush currents lasting a considerable length of time. Designed not to trip on 20 times the rated current (peak value) for a duration of 8ms. Suited for With Inertia Delay (F) transformer and lamp loads that draw steep inrush currents.

16,000 Inertia Delay Descriptions Pulse Peak Circuit breakers equipped with inertia delay do not respond to high inrush currents such as 14,000 Current those produced by transformer, lamp, or motor loads, but perform the speciﬁed interruption on the rated overcurrents. Pulse (duration) 12,000 Width Specify inertia delay by inserting an “F” in the part number as shown in Part Number Guide on previous page. 10,000 8,000

6,000 cent of Rated Current r 4,000 Pe 2,000

12345678910 Pulse Width (ms)

Pulse Peak Current 1. Percent of Rated Current = x 100% Protector Rated Current

2. Based on sinusoidal or parabolic pulse proﬁle.

Notes

Multi-Pole Multi-pole types such as 2- or 3-pole should be assembled by IDEC. Because of their characteristics, 1-pole breakers cannot be combined to provide multi-pole units.

Auxiliary and Alarm Contacts N Multi-pole units can incorporate auxiliary and alarm contacts. Auxiliary and alarm contacts will not work with IDEC’s DIN rail adapters. Circuit Breakers

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NRA Series Circuit Breakers

Accessories

Part Numbers: NRA Series Accessories Description Appearance Part No. Remarks

Red NR5R Colored Ø 0.62" Cap (15.8mm) Blue NR5S Color Caps (NRAS only) Panel Yellow NR5Y

White NR5H Colored caps ﬁt onto NRAS circuit breakers for color coding circuits and improving the appearance of the panel.

Screw Terminal Adapter For use on main terminals only. NRT Includes M3.5 clamp screw. (1 pair) For dimensions see page N-10.

Part Numbers: NRA Mounting Accessories No. of Description Appearance For Model Part No. Remarks Poles NRAN NRAR 1-pole NR31 NRAN 2-pole NR32 Use of a ﬂush plate makes snap-in mount possible for NRAN, and NRAR Panel Mount 2.65" 1.89" (68mm) circuit breakers (tightening Flush Plate 0.936" (48.5mm) screws not necessary). (24mm) Multiple units can mount in NRAN 3-pole NR33 a single panel cut-out. 2.46" (63mm)

2.26" 0.757" 1.50" (58mm) (38.5mm) Mounting (19.4mm) 1-pole NR21 Clip 1.Furnished with a hold- down spring. NRAS 2.Applicable only for series NRAN DIN Rail trip units up to 20 amps. 2-pole NR22 3.Not applicable for NRAR Plug-in Base lighted series. 4.Not for use with circuit DIN Rail 3-Pole 3-pole NR23 breakers incorporating auxiliary or alarm contacts. 1-Pole 2-Pole Hold-Down Spring N NRAR 1-pole NR211

1-pole NUS1 NRAS Surface Mount NRAN 2-pole NUS2 Plug-in Base 3-pole NUS3 NRAR 1-pole NUS11

For dimensions of NRA series accessories and panel cut-out layouts, see drawings starting on page N-10. Circuit Breakers

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Circuit Breakers NRA Series

Internal Circuits and Terminal Arrangements: NRAS and NRAN Series

Series Current Trip Series Current Trip Series Current Trip with Auxiliary Contacts with Alarm Contacts

LINE LINE LINE

NC NO

NO NC C C

LOAD LOAD LOAD

Internal Circuits and Terminal Arrangements: NRAR Series

Pilot Lights (NRAR only) Series Current Trip Series Current Trip Series Current Trip with Auxiliary Contacts with Alarm Contacts Lead Wire Pilot Light A B LOAD LOAD LOAD Neon White White (Lead Wire A) (Lead Wire A) (120V AC) (Lead Wire B) (+) (~) (Lead Wire B) Neon Black Black C C (240V AC) Dashed lines represent (–) (~) NO NC NRAR illuminated rocker units. Lead wires for neon NC NO pilot light as shown above. LINE LINE LINE

Time Delay Curves (numerical equivalent)

Overcurrent — Time Delay Characteristics in Seconds (at 25°C) Percent of Rated Current Curve 100% 125% 150% 200% 400% 600% 800% 1000% AD No trip 10 – 130 6 – 55 2.6 – 20 0.5 – 3.5 0.12 – 1.4 0.008 – 0.1 0.005 – 0.05 N Circuit Breakers DC MD No trip 35 – 400 20 – 200 7 – 60 1.3 – 8 0.2 – 3 0.01 – 0.25 0.006 – 0.08 AA No trip 10 – 120 6 – 45 2.2 – 15 0.3 – 2 0.05 – 0.55 0.007 – 0.13 0.005 – 0.04 BA No trip 0.75 – 10 0.45 – 3.5 0.22 – 1.3 0.045 – 0.22 0.012 – 0.12 0.005 – 0.06 0.004 – 0.03

MA No trip 60 – 900 30 – 260 9 – 70 1.5 – 8 0.18 – 2.5 0.009 – 0.25 0.006 – 0.08 AC (50/60Hz)

1. All values above are in seconds. 2. Data in this table is equivalent to information presented in following time delay curves.

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DC Time Delay Curves

1,000 1,000 AD Delay Curve 100 at 77˚F (25˚C) MD Delay Curve 100 at 77˚F (25˚C)

10 10

1 1

Time in Seconds 0.1

Time in Seconds 0.1 0.01

0.01

100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 150 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 150

AC (50/60Hz) Time Delay Curves

1,000 1,000 AA Delay Curve BA Delay Curve 100 at 77˚F (25˚C) 100 at 77˚F (25˚C)

10 10

1 1 Time in Seconds 0.1 Time in Seconds 0.1

0.01 0.01

100 200 300 400 500 600 700 800 900 1,000 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 125 Percent of Rated Current 150 1,000 150

MA Delay Curve N 100 at 77˚F (25˚C)

Time in Seconds 0.1

0.01 Circuit Breakers

100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 150

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Resistance and Impedance Characteristics

Coil Data for Series Current Trip at 25˚C Rated AC Impedance Coil Resistance at 25°C DC Resistance Current (50/60Hz) 100 Curves AA, BA, Curves AD, MD MA Curves AD, MD 0.3A 9.67Ω 9.82Ω 10 0.5A 3.24Ω 3.36Ω 0.75A 1.45Ω 1.49Ω 1 1A 0.90Ω 0.92Ω Rated Current (A) 2A 0.21Ω 0.21Ω 0.1 3A 0.09Ω 0.092Ω 0.01 5A 0.036Ω 0.036Ω 0.001 0.01 0.1 110100 Coil Resistance (Ω) 7.5A 0.017Ω 0.018Ω 10A 0.012Ω 0.012Ω 100 15A 0.0066Ω 0.0068Ω 20A 0.0048Ω 0.0048Ω 10 Curves AA, BA, MA 25A 0.0043Ω 0.0043Ω 30A 0.0036Ω 0.0041Ω 1

Tolerance ±25% (up to 20A), ±50% (25A and over). Rated Current (A) 0.1

0.01 Voltage Drop Due to Resistance or Impedance 0.001 0.01 0.1 110100 Ω The internal resistance or impedance of a circuit breaker tends to be larger for Impedance ( ) a smaller rated current. Therefore, when circuit breakers with a small rated current are used, voltage drop should be taken into consideration. Internal resistance also varies with time delay curves, even at the same rated current. This should also be considered during installation.

Time Delay Curve and Ambient Temperature Since NRA series circuit breakers employ an electromagnetic tripping system, the rated current (trip current) is not affected by the ambient temperature, but Temperature Correction Curves the time delay varies with the oil viscosity in the tube. Lower oil viscosity at higher temperatures results in shorter delay; whereas at lower temperatures, the delay will be prolonged. The time delay curves, shown starting on page N- Curves AD, AA, BA 7, are at 25°C. Time delay curves can be corrected. (on 125% rated current)

400 200 100 80 Rated Current (A) 60 N 40 Circuit Breakers –40 –20 0 25 50 70 90 Ambient Temperature (°C)

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Dimensions

NRAS

1-poleý Tab 250 Terminal (6.4W 5 0.8t) 2-M3 Tab 110 Terminal 2-M3 Mounting Screw (2.8W 5 0.5t)

LINE 8.2

OFF Approx. 60 16.6 40 CNONC CNCNO 50.6 42.2 30.8

LOAD 19.1 0.2 40 NRAS1111 NRAS1121 3.3 49.5 NRAS1111F NRAS1121F 17.5 53.6 2-pole 3-pole 4-M3 6-M3

OFF OFF OFF OFF OFF CNONC CNCNO CNONC CNCNO

19.1 19.1 19.1 38.2 NRAS2111 NRAS2121 57.3 NRAS3111 NRAS3121 NRAS2111F NRAS2121F NRAS3111F NRAS3121F

NRAN

1-pole Tab250 Terminal 2-M3 (6.4 W × 0.8t) Tab110 Terminal 2-M3 Screw (2.8W × 0.5t)

LINE 8.2

OFF 16.6 52 40 CNONC CNCNO 31.5 42.2

Approx.

LOAD 19.1 4.5 41 NRAN1111 NRAN1121 16.5 50.5 NRAN1111F NRAN1121F 54.6 2-pole 3-pole 4-M3 6-M3

N OFF OFF OFF OFF OFF CNONC CNCNO CNONC CNCNO

19.1 19.1 19.1 NRAS2111 NRAN2121 NRAN3111 NRAN3121 57.3 38.2 NRAS2111F NRAN2121F NRAN3111F NRAN3121F

NRAR Tab250 Terminal Pilot Light Lead Wire (Pilot Light Terminal)

LOAD LOAD CNONC

Circuit Breakers ON NP 52 NP 40 40 42.2 31.5

OFF 17.3 9.2 8.2 16.6 LINE LINE

56 56 Tab110 Terminal 65.5 65.5 (2.8W × 0.5t) 70.5 69.6

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Panel Cut-Outs

Installation Angle: Circuit breakers are designed to operate on a vertical surface. The mounting angle should not exceed a vertical plane by more than 10°.

NRA Series

NRAS NRAR, NRAN ø4 holes ø4 holes (9.8) 19.1 19.1 5.1 0 +0.3 ø16 32 42.2 42.2 26.7

19.1 19.1 5.1 1-pole 19.6 2-pole 38.7 3-pole 57.8

NR31, NR32, NR33 — Panel Mount Flush Plate

Panel Thickness 1 to 4mm 5mm 0 +0.5 53.5

19.6 1-pole (Note 1) 2-pole 38.7 (Note 2) 16.5 41mm mm 3-pole 57.8 (Note 3)

Panel cut-out when two or more units are mounted closely (n = number of units). Note 1: 24.3n - 5 Note 2: 48.8n - 10 Note 3: 69.3n - 10

Maximum Mounting Distance Model A B Schematics in mm N

Mounting to Panel Surface Mounting to DIN Rail Circuit Breakers NRAS 3.02" (77.5mm) 3.57" (91.5mm) When mounted on a panel When mounted on a DIN Rail 19.1mm 20.2mm 26mm

NRAN 3.02" (77.5mm) 3.57" (91.5mm) DIN rail

2-ø3.5 holes 9mm 75mm

NRAR 3.38" (86.7mm) 3.93" (100.7mm) A B

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Accessory Dimensions

NRT: Screw Terminal Adapter (for use with NRA Series)

1.For use on main terminals only. 2.Includes M3.5 clamp screw.

BNDN1000 Aluminum DIN Rail Length in Inches (mm) A 1.4" (35mm) F B 1.14" (29mm) C 0.78" (23mm) D 1.2" (31mm) G H A E 0.41" (10.5mm) K B D C F 0.11" (3mm) G 2" (51mm) H 0.47" (12mm) H Overall length 39.4" (1000mm) K 0.16" (4mm)

N Circuit Breakers

N-12 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Circuit Breakers NRBM Series

NRBM Series

NRBM circuit breakers are the largest in rated current (1A to 50A) among the IDEC circuit breakers series. These small sized, high- efﬁciency breakers offer a variety of protection characteristics that can be widely employed for semiconductors, relay circuits, heater circuits, transformers, and solenoids.

Key features of the NRBM series include: • Excellent overload and short circuit protection • Small size and high efﬁciency • Life expectancy of over 10,000 operations • UL1077 recognized Supplementary Protectors • VDE Certiﬁed to EN60934

File No. E68029 license #113434

Protection Method Electromagnetic tripping Internal Circuit Series current trip Number of Poles 1, 2, 3 Rated Voltage 250V AC, 50/60Hz, 65V DC Rated Tripping Currents Current trip: 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, 40A, 50A 250V AC, 50/60Hz, 1,000A Rated Interrupting Capacity 65V DC, 1,000A Auxiliary Contacts SPDT microswitch 250V AC, 5A (resistive load) Alarm Contact 50V DC, 1 A (resistive load) Reference Temperature 25°C Ambient Operating Temperature –40 to +85°C (avoid freezing) Insulation Resistance 100MΩ minutes (measured with 500V megger) Between main circuit terminals: 2,000V AC, 1 minute Dielectric Strength Between main circuit and auxiliary contact: 2,000V AC, 1 minute General Specifications Vibration Resistance 100N (approximately 10G), 10 to 55Hz Shock Resistance 1,000N (approximately 100G) Life Expectancy 10,000 operations minimum (at 6 operations per minute) Main terminal: M5 stud Terminal Style Auxiliary contact/ alarm contact: Quick-connect tab 0.110" terminal N 1-pole/100g

Weight 2-pole/200g Circuit Breakers 3-pole/300g

1. Not suitable for branch circuit protection.

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Part Numbering Guide NRBM series part numbers are composed of 6 part number codes. When ordering an NRBM series part, select one code from each category. Example: NRBM 1 1 11 F-30A-AA

NRBM 1 1 11 F 30A AA

➀ Poles ➁ Internal ➂ Auxiliary and ➃ Inertia ⑤ Rated Current ➅ Time Delay Circuit Alarm Contacts Delay

Part Number Codes: NRBM Series Description Part Number Code Remarks 1-pole 1 ➀ All multiple circuit breakers are simultaneous throw/simultaneous No. of Poles 2-pole 2 break. All levers are mechanically interlocked. 3-pole 3 ➁ Internal Circuit Series current trip 1 Without 00 ➂ Auxiliary and With auxiliary contact 11 Auxiliary contact switches change state with lever and/or overload Alarm Contacts condition With alarm contact 21 Alarm contact switches change state only with overload condition Without inertia delay Blank ➃ Inertia Delay With inertia delay F 1A, 2A, 3A, 5A, 7.5A, ⑤ Rated Current Rated current (series current trip) 10A, 15A, 20A, 25A, 30A, 40A, 50A

➅ Time Delay DC curves AD, MD See page N-16 for delay curves. Curve AC curves AA, BA, MA Leave blank for switch only units.

1. For NRBM series accessories, see page N-16. 2. For NRBM series time delay curves, see page N-16. 3. For NRBM series dimensions, see page N-19. 4. Not suitable for branch circuit protection. 5. UL recognized, applicable standard: UL1077, “Supplementary Protectors.”

N Circuit Breakers

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Information About Circuit Breakers

Time Delay Curve Descriptions Time Delay Curve NRBM Application AD, AA Common curves used in molded-case circuit breakers. Response to overcurrent is quite fast. Suited for protection of semiconductor circuits with BA very little overload tolerance. If overcurrents are expected to ﬂow, fuses may be required according to the circuit characteristics. MD, MA Suited for motor loads that draw high inrush currents lasting a considerable length of time. Designed not to trip on 20 times the rated current (peak value) for a duration of 8ms. Suited for With Inertia Delay (F) transformer and lamp loads that draw steep inrush currents.

16,000 Inertia Delay Descriptions Pulse Peak Circuit breakers equipped with inertia delay do not respond to high inrush currents such as 14,000 Current those produced by transformer, lamp, or motor loads, but perform the speciﬁed interruption on the rated overcurrents. Pulse (Duration) 12,000 Width Inertia delay is available with time delay curves AD, MD, AA, BA, and MA. 10,000 Specify inertia delay by inserting an “F” in the part number as shown in Part Number Guide on previous page. 8,000

6,000 cent of Rated Current r 4,000 Pe 2,000

12345678910 Pulse Width (ms)

Pulse Peak Current 1. Percent of Rated Current = x 100% Protector Rated Current

2. Based on sinusoidal or parabolic pulse proﬁle.

Notes

Multi-Pole Multi-pole types such as 2- or 3-pole should be assembled by IDEC. Because of their characteristics, 1-pole breakers cannot be combined to provide multi-pole units. All multi-pole units are simultaneous break/simultaneous make, with levers mechanically interlocked. N

Auxiliary and Alarm Contacts Circuit Breakers Multi-pole units with auxiliary contacts will have one set of auxiliary contacts on the right- most breaker. Multi-pole units with alarm contacts will have one set of alarm contacts on the left-most breaker.

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NRBM Series Circuit Breakers

Internal Circuits and Terminal Arrangements

Series Current Trip Series Current Trip Series Current Trip with Auxiliary Contacts with Alarm Contacts

LINE LINE LINE

NC NO NO NC

C C

LOAD LOAD LOAD

Time Delay Curves (numerical equivalent)

Overcurrent — Time Delay Characteristics (at 25°)

Percent of Rated Current Curve 100% 125% 150% 200% 400% 600% 800% 1000% AD No trip 10 – 130 6 – 55 2.6 – 20 0.5 – 3.5 0.14 – 1.4 0.008 – 0.7 0.005 – 0.35

DC MD No trip 35 – 400 20 – 180 8 – 60 1.6 – 10 0.6 – 4.5 0.01 – 2 0.007 – 0.5 AA No trip 15 – 120 8 – 45 3 – 15 0.48 – 2.5 0.06 – 0.8 0.007 – 0.13 0.005 – 0.04 BA No trip 0.75 – 10 0.45 – 3.5 0.22 – 1.3 0.045 – 0.22 0.012 – 0.12 0.005 – 0.06 0.004 – 0.03

MA No trip 70 – 900 30 – 260 10 – 70 1.8 – 11 0.5 – 4 0.009 – 1.1 0.006 – 0.2 AC (50/60Hz)

1. All values above are in seconds. 2. Data in this table is equivalent to information presented in following time delay curves.

N Circuit Breakers

N-16 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Circuit Breakers NRBM Series

DC Time Delay Curves

1,000 1,000 AD Delay Curve 100 at 77˚F (25˚C) MD Delay Curve 100 at 77˚F (25˚C)

10 10

1 1 ime in Seconds T

0.1 ime in Seconds T 0.1

0.01 0.01

100 200 300 400 500 600 700 800 900 1,000 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 125 Percent of Rated Current 150

AC (50/60Hz) Time Delay Curves: NRBM Series

1,000 1,000 AA Delay Curve BA Delay Curve 100 at 77˚F (25˚C) 100 at 77˚F (25˚C)

10 10

1 1 ime in Seconds ime in Seconds T 0.1 T 0.1

0.01 0.01

100 200 300 400 500 600 700 800 900 1,000 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 125 Percent of Rated Current 150 150

1,000 MA Delay Curve 100 at 77˚F (25˚C)

10 N 1 Circuit Breakers ime in Seconds T 0.1

0.01

100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 150

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Resistance and Impedance Characteristics

Coil Data for series Current Trip at 25˚C Rated AC Impedance Coil Resistance at 25°C DC Resistance Current (50/60Hz) 100 Curves AD, MD Curves AA, BA, MA 1A 1Ω 1.1Ω 10 Curves AD, MD 2A 0.227Ω 0.245Ω 3A 0.091Ω 0.11Ω 1 5A 0.035Ω 0.039Ω

Ω Ω Rated Current (A) 7.5A 0.015 0.018 0.1 10A 0.0088Ω 0.0124Ω Ω Ω 0.01 15A 0.005 0.0065 0.001 0.01 0.1 110100 Coil Resistance (Ω) 20A 0.003Ω 0.0047Ω 25A 0.0023Ω 0.0032Ω 100 30A 0.0019Ω 0.0031Ω 40A 0.0018Ω 0.002Ω 10 Curves AA, BA, MA 50A 0.0014Ω 0.0016Ω

Tolerance ±25% (up to 20A), ±50% (25A and over) 1 Rated Current (A) 0.1

0.01 0.001 0.01 0.1 110100 Voltage Drop Due to Coil Resistance or Impedance Impedance (Ω) The internal resistance or impedance of a circuit breaker tends to be larger for a smaller rated current. Therefore, when circuit breakers of a small rated current are used, voltage drop should be taken into consideration. Internal resistance also varies with time delay curves, even at the same rated current. This should also be considered during installation. Time Delay Curve and Ambient Temperature Since NRBM series circuit breakers employ an electromagnetic tripping system, the rated current (trip current) is not affected by the ambient temperature, but the time delay varies with the oil viscosity in the tube. Lower oil viscosity at higher temperatures results in shorter delay; whereas at lower temperatures, Curves AD, AA, BA the delay will be prolonged. The time delay curves, shown starting on page N- (on 125% rated current) 16, are at 25°C. Time delay curves can be corrected.

400 200 100 80 Rated Current (A) 60 N 40 –40 –20 0 25 50 70 90 Ambient Temperature (°C) Circuit Breakers

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Dimensions: NRBM Series

2-M3 Screw 19.1 19.1 2-M3 Screw 10.0 Main Terminal M5 Screw

Tab110 Terminal (2.8W × 0.5t) °

NRBM 60 35.0 63.0 52.3 49.2

1-pole 19.1 3.5 47.5 16.0 20.5 63.5 2-pole 38.2 3-pole 57.3

Panel Cut-Outs

NRBM Series

All drawings are not to scale unless scale is indicated.

9.8 19.1 19.1 ø4 holes NRBM 26.15 20.95 35.5 52.3

1-pole 19.6 2-pole 38.7 3-pole 57.8

N Circuit Breakers

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NRC Series

NRC series circuit breakers offer circuit protection which is far superior to using fuses in applications containing relay circuits, motor circuits, heater circuits, transformers, solenoid valves, and semiconductors.

Key features of the NRC series include: • Mounting options include DIN rail, direct surface, or panel cut-out • Designed for control circuit and power line protection • Rated interrupting capacity of 2,500A (1-pole) and 1,500A (2-pole) • Choice of slide or lever actuators • All models equipped with reset trip indicators • Models available for AC or DC loads •Two curves available for standard or very short delay •Available in 11 rated currents from 300mA to 30A • Options include auxiliary contacts • UL1077 recognized “Supplementary Protectors”

UL Recognized CSA Certiﬁed File No. E68029 File No. LR83454

Load Type AC DC Protection Method Electromagnetic tripping Internal Circuit Series current trip Number of Poles 1, 2 Rated Voltage 250V AC, 50/60Hz, 65V DC Rated Tripping Currents 0.3A, 0.5A, 1A, 2A, 3A, 5A, 7A, 10A, 15A, 20A, 30A 2,500A, 250V AC, 50/60Hz 1,500A, 65V DC Rated Interrupting Capacity (2-pole: 1,500A) (2-pole: 1,000A) Optional SPDT contact output Auxiliary Contact 250V AC 3A (resistive load) 65V DC 1A (resistive load)) Reference Temperature 40°C N Operating Temperature –10 to +60°C (avoid freezing) Specifications Insulation Resistance 100MΩ minutes (500V megger) Between the live part and the ground, between terminals of different poles, between termi- Dielectric Strength nals of the same pole, and between main circuit and auxiliary contact: 2,000V AC, 1 minute 100N (approximately 10G) Vibration Resistance (10 to 55Hz) Shock Resistance 500N (approximately 50G) Life 10,000 operations minimum Main terminal: M4 screw (20A maximum) Terminal Style M5 screw (30A model) Auxiliary terminal: M3.5 screw

Circuit Breakers Weight (approximate) 1-pole: 115g, 2-pole: 230g

Not suitable for branch circuit protection.

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Part Numbering Guide

NRC series part numbers are composed of 5 part number codes. When ordering an NRC series part, select one code from each category. Example: NRC111L- 0.30A-AA

NRC11 1 L 0.30A AA

➀ No. of Poles ➁ Auxiliary ➂ Actuator ➃ Rated Current ⑤ Time Delay Curve Contacts Type

Part Number Codes: NRC Series Appearance Description Part Number Code Remarks 1-pole 11 ➀ No. of Poles 2-pole 21 No 0 ➁ Auxiliary Contacts Yes 1

Slide actuator Slide Leave blank available only for 1-pole models.

➂ Actuator Type

Lever L

➃ Rated Current 0.3A, 0.5A, 1A, 2A, 3A, 5A, 7A, 10A, 15A, 20A, 30A ⑤ Time Delay Curve AC curves: AA, EA; DC curves: AD, ED

1. For NRC series accessories, see page N-22. 2. For NRC series time delay curves, see page N-23. 3. For NRC series dimensions, see page N-25. N Circuit Breakers

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Accessories

Part Numbers: DIN Rail and Mounting Clips Description Appearance Part No. Remarks

For dimensional Aluminum DIN Rail (1 meter length) BNDN1000 drawing, see page N-28.

DIN Rail End Clip Metal end clip used to prevent side-to-side movement of circuit breakers when mounted on a BNL5 DIN rail. One clip required at each end.

Panel Cut-Out Mounting Bracket Mounting bracket used to mount circuit breaker(s) in panel cut-outs. Not applicable for models For dimensional with auxiliary contacts (NRC111, NRC111L, NRC211L). When mounting 2-pole models (NRC210L), NRC-M drawings, use two brackets side-by-side. It is recommended to use the “Fast-On Tab Terminal Adapter” see page N-27. (below) when using this bracket.

For dimensional Surface Mounting Bracket NRC-F drawings, Used for direct surface mounting 1-pole circuit breaker models. see page N-27.

Fast-On Tab Terminal Adapter For dimensional Adapter used for Fast-On wiring termination. Fast-On tab extends 0.47" (12mm) in length. Cannot NRC-T drawings, be used to replace models with M5 main terminals (30A). Fast-On terminal adapter recommended see page N-27. when using panel cut-out mounting bracket for rear wiring.

Jumper NRC-J Used for jumping auxiliary terminals. The rated current for jumper is 3A.

For dimensions of NRC series accessories, see page N-27.

N Internal Circuit

Line Line

1-Pole 2-Pole without without Auxiliary Contacts Auxiliary Contacts

Load Load

Line Line Circuit Breakers 1-Pole 2-Pole with with Auxiliary Contacts Auxiliary Contacts

NC NO C Load NCNO C Load

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Time Delay Curves (numerical equivalent)

Overcurrent — Time Delay Characteristics in Seconds (at 40°C) Percent of Rated Current Curve 100% 125% 150% 200% 400% 600% 800% 1000% AD No trip 40 – 240 10 – 50 3.5 – 18 0.6 – 3 0.008 – 0.5 0.005 – 0.09 0.004 – 0.07 DC ED No trip 0.04 – 0.4 0.025 – 0.15 0.015 – 0.06 0.007 – 0.025 0.005 – 0.018 0.004 – 0.017 0.004 – 0.017 AA No trip 40 – 240 10 – 50 3.5 – 18 0.9 – 4 0.35 – 2 0.07 – 1.2 0.01 – 0.5 AC EA No trip 0.05 – 0.4 0.03 – 0.17 0.02 – 0.07 0.008 – 0.025 0.005 – 0.018 0.004 – 0.017 0.004 – 0.017

1. All values above are in seconds. 2. Data in this table is equivalent to information presented in following time delay curves.

Time Delay Curves

DC Time Delay Curves AC (50/60 Hz) Time Delay Curves 1,000 1,000 AD Delay Curve AA Delay Curve 100 at 77˚F (25˚C) 100 at 77˚F (25˚C)

10 10

1 1 ime in Seconds ime in Seconds T 0.1 T 0.1

0.01 0.01

100 200 300 400 500 600 700 800 900 1,000 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 125 Percent of Rated Current 150 150

1,000 1,000 ED Delay Curve EA Delay Curve 100 at 77˚F (25˚C) 100 at 77˚F (25˚C)

10 10

1 1 N ime in Seconds ime in Seconds Circuit Breakers T 0.1 T 0.1

0.01 0.01

100 200 300 400 500 600 700 800 900 1,000 100 200 300 400 500 600 700 800 900 1,000 125 Percent of Rated Current 125 Percent of Rated Current 150 150

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Resistance and Impedance Characteristics

Coil Impedance (at 40°C) Rated AC Impedance DC Resistance AC Impedance at 40°C Current (50/60Hz) 100 0.30A 15.1Ω 25.6Ω 0.50A 5.58Ω 9.04Ω 1A 1.54Ω 2.33Ω 10 2A 0.341Ω 0.548Ω 3A 0.162Ω 0.261Ω 1

5A 0.061Ω 0.099Ω Rated Current (A) 7A 0.031Ω 0.048Ω 0.1 10A 0.017Ω 0.026Ω 0.01 15A 0.008Ω 0.013Ω 0.0001 0.001 0.01 0.1 1.0 10 100 20A 0.0058Ω 0.0075Ω 30A 0.0039Ω 0.0046Ω DC Resistance at 40°C

100 Tolerance: ±10% (0.3A to 3A), ±25% (5A to 30A).

Voltage Drop Due to Coil Impedance The internal impedance of a circuit breaker tends to be larger for a smaller 1

rated current. Therefore, when low rated circuit breakers are used, the voltage Rated Current (A)

drop should be taken into consideration. 0.1

0.01 0.0001 0.001 0.01 0.1 1.0 10 100 Resistance (Ω)

Temperature Correction Curve

Curves AA, AD (on 125% rated current)

400 200 100 80 Rated Current (A) 60 N 40 –40 –20 0 25 50 70 90 Ambient Temperature (°C) Circuit Breakers

N-24 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Circuit Breakers NRC Series

Dimensions: NRC Series

NRC110 Main Terminal Slide Actuator M4 Screw 1-Pole without Auxiliary Contacts (20A maximum) When using BNDN: 74.2 2-ø4.5 holes M5 Screw (30A) 12 23

OFF 54 68 45.5 63.5 s q h o

15 25 4 64 DIN Rail (BNDN)

Main Terminal NRC110L M4 Screw Lever Actuator (20A maximum) 1-Pole without Auxiliary Contacts 2-ø4.5 holes M5 Screw (30A) 12 When using BNDN: 80.2 23

OFF 54 68 63.5 TRIP

64 45.5

15 10 64 25 DIN Rail (BNDN)

-AIN4ERMINAL NRC111 -3CREW!MAX Slide Actuator HOLE -3CREW! 7HENUSING".$. 1-Pole with Auxiliary Contacts N .0 Circuit Breakers

/&& 42)0 !UXILIARY4ERMINAL $).2AIL".$. -3CREW

Installation Angle: Circuit breakers are designed to operate on a vertical surface. The mounting angle should not exceed a vertical plane by more than 10°.

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Dimensions: NRC Series, continued

NRC111L Main Terminal Lever Actuator M4 Screw (20A maximum) 1-Pole with Auxiliary Contacts 2-ø4.5 holes M5 Screw (30A) When using BNDN: 80.2 12 23

OFF 54 68 45.5 63.5 64 TRIP 9.5 15 10 64 25 Auxiliary Ter minal DIN Rail (BNDN) M3.5 Screws

NRC210L Main Terminal Lever Actuator M4 Screw (20A max.) 2-Pole without Auxiliary Contacts 4-ø4.5 Holes M5 Screw (30A) 37 When using BNDN: 80.2 23

NP NP

OFF OFF 68 54 63.5 TRIP 45.5

15 10 64 50 DIN Rail (BNDN)

Main Terminal NRC211L M4 Screw (20A) 4-ø4.5 hole M5 Screw (30A) Lever Actuator When using BNDN: 80.2 2-Pole with Auxiliary Contacts 37 23

NP NP

OFF OFF 68 54 TRIP 45.5 N 63.5 64 9.5 15 10 64 50 DIN Rail (BNDN) Auxiliary Terminal M3.5 Screw Circuit Breakers

Installation Angle: Circuit breakers are designed to operate on a vertical surface. The mounting angle should not exceed a vertical plane by more than 10°.

N-26 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Circuit Breakers NRC Series

Panel Cut-Outs

NRC Series Surface Mounting Hole Layout 1-Pole Surface Mounting Hole Layout 2-Pole

2-M4 12 2-M4 37

When using M4 screws When mounting 54 with M4 screws 54

Panel Cut-Out (when using NRC-M)

2-ø4 25.5 4-ø4 56 46 56 46

25.5 51

1-pole 2-pole

Accessory Dimensions

Panel Cut-Out Mounting Adapter (NRC-M)

23.5 1.2 60 2 12.5 12 6.5 9 16 R5.5 R5 2 2-M4 2-M3 4

NRC-M Panel Mounting Bracket 26 54 56 45.6

N Surface Mounting Bracket (NRC-F) Circuit Breakers

NRC-F Surface Mounting Bracket

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Accessory Dimensions, continued

N Circuit Breakers

N-28 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com Circuit Breakers Instructions

Instructions: All Series

General Applications IDEC’s circuit breakers have been developed for the protection of electrical The IDEC NRA circuit breaker series features superior overload and short-cir- circuits and small-sized electrical equipment and provide excellent protection cuit protection. Many combinations of protection mechanisms and internal against overloads and short-circuits. circuit connections enable wide applications. • Precision measuring instruments: electronic counters, projection Additionally, IDEC’s circuit breakers are designed to suit specific needs. Each instruments, oscilloscopes, industrial instrumentation, and analytic series offers unique circuit protection characteristics and a choice of actuator devices styles. • Electronic communication devices: facsimile machines, computers, recorders • Industrial machinery: printers, elevators, cranes • Chemical and food industry machines: vacuum devices, wrappers, IDEC’s Circuit Breaker Features centrifuges, agitators •Various models are available with different internal circuits, tripping charac- • Machine tools: mill grinders, drills, presses teristics, and rated currents • Business machines: automatic vendors, medical equipment, beauty • 1- to 3- multi-pole salon equipment, entertainment games • Inertia delay • Other: office equipment, air-conditioners, conveyor belts, and many more • Auxiliary contacts and alarm contacts • The electromagnetic tripping system is not affected by ambient temperature • Safe trip-free mechanism •Vibration- and impact-resistant design How the Breaker Operates • When using accessories such as plug-in bases, flush plates, and colored IDEC’s hydraulic magnetic circuit breakers operate like a solenoid coil. The caps, a variety of mounting styles is possible — such as DIN rail mount- coil unit consists of an oil-filled tube with a metal core at one end and a pole ing, snap mounting into panel cut-outs, and color-coded arrangement on piece and armature at the opposite end with a spring in between. the panel When a current load passes through the coil winding, it creates a magnetic field. As long as the current load is either at or below the nominal rating of Mounting Instructions: Installation Angle the breaker, the metal core will remain stationary. Designed to be mounted on a vertical surface, the circuit breakers should be If the current load increases beyond the nominal rating, the strength of the mounted on a surface within 10° of the vertical plane. If the circuit breaker is magnetic field causes the core to move toward the pole-end of the tube. The mounted on a horizontal surface or at any angle other than the specified oil viscosity regulates the core’s movement through the tube, thereby regulat- angle, its characteristics will be changed. ing the time delay. As the percentage of current load increases, the required trip time of the breaker decreases and vice versa. Multi-Pole Assemble Multi-pole types such as 2- or 3-pole should be assembled by IDEC. When the current reaches the overload rating, the metal core will meet the Because of their characteristics, 1-pole breakers cannot be com- pole piece at the opposite end of the tube. At this point, the armature is bined to produce multi-pole units. attracted to the same pole piece, tripping the breaker. In case of sudden short circuit, the magnetic field created will instantly trip the breaker.

Internal Circuits Overview

Description Circuit Example

Series Trip This is the most common circuit breaker, providing excellent overload and short circuit Load protection. It can also be used as an ON/OFF switch.

Series Trip with Auxiliary Contact Circuit Breakers Since the auxiliary contact operation is interlocked with the ON/OFF of the main contactor, Load A circuit breaker operation can be monitored by a lamp or buzzer. This circuit breaker can also be used to control auxiliary circuits up to 250V AC/5A (resistive load).

Load B

Series Trip with Alarm Contact Since the alarm contact is electrically independent of the main contactor, but actuates Load A when the protective element operates. The alarm can be used with a lamp or buzzer to monitor trip operations, and can also be used for controlling alarm circuits. The contact rating is 250V AC/5A (resistive load).

Load B

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N Circuit Breakers

N-30 www.idec.com USA: (800) 262-IDEC or (408) 747-0550, Canada: (888) 317-IDEC Courtesy of Steven Engineering, Inc.-230 Ryan Way, South San Francisco, CA 94080-6370-Main Office: (650) 588-9200-Outside Local Area: (800) 258-9200-www.stevenengineering.com