Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRA Series Circuit Breakers NRA Series Features: • Available in 4 different styles NRAN NRAS • Excellent overload and short circuit protection • Small size and high-effi ciency • Life expectancy of over 10,000 operations • UL1077 recognized “Supplementary Protectors” • VDE certifi ed to EN60934 License #116381 File No. E68029 NRAR Rocker Illuminated Rocker (with Neon lamp) Specifi cations 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), 50V DC, 1A (resistive load) Alarm Contact SPDT microswitch: 250V AC, 5A (resistive load), 50V DC, 1A (resistive load) Reference Temperature 25°C Operating Temperature –40 to +85°C (avoid freezing) Insulation Resistance 100MΩ (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 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” Illumination Voltage Neon: 120, 240V AC, 50/60Hz (NRAR illuminated units) Not suitable for branch circuit protection. USA: 800-262-IDEC Canada: 888-317-IDEC 883 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 -1 NRAR 1 1 11 — F — 30A — AA — 1 j Model k Poles l Internal m Auxiliary and n Inertia Delay o Rated Current p Time Delay Curve q Pilot Light* Circuit Alarm Contacts Part Number Codes: NRA Series Description Part Number Code Remarks Lever (round cutout) NRAS j Model Lever (rectangular cutout) NRAN Rocker NRAR 1-pole 1 NRAR available in 1-pole only. All multi-pole circuit breakers are simultaneous k No. of Poles 2-pole 2 throw/simultaneous break. 3-pole 3 All levers are mechanically interlocked. l Internal Circuit Series current trip 1 Without 00 m Auxiliary and With auxiliary contact 11 Auxiliary contact switches change state with lever and/or overload condition Alarm Contacts With alarm contact 21 Alarm contact switches change state only with overload condition Without inertia delay Blank n Inertia Delay With inertia delay F 0.3A, 0.5A, 0.75A, 1A, 2A, 3A, 5A, All current ratings must be listed in amps (A). Rated current (current trip) o Rated Current 7.5A, 10A, 15A, 20A, 25A, 30A Example conversion: 300mA = 0.30A. AC curves AA, BA,MA p Time Delay Curve For time delay curves, see page 888. DC curves AD, MD With neon light 120V AC (50/60Hz) 1 *Applicable to illuminated NRAR only. q Pilot Light* With neon light 240V AC (50/60Hz) 2 1. For NRA series accessories, see page 886. 2. For NRA series time delay curves, see page 888. 3. For NRA series dimensions, see page 890. 4. Not suitable for branch circuit protection. 5. UL recognized, applicable standard: UL1077, “Supplementary Protectors.” 884 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRA Series Circuit Breakers 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 very little overload tolerance. If overcurrents are expected to BA fl ow, 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. With Inertia Delay (F) Designed not to trip on 20 times the rated current (peak value) for a duration of 8ms. Suited for transformer and lamp loads that draw steep inrush currents. 16,000 Pulse Peak 14,000 Current Pulse 12,000 (duration) Width 10,000 8,000 Inertia Delay Description 6,000 Circuit breakers equipped with inertia delay do not respond to high inrush currents such as 4,000 those produced by transformer, lamp, or motor loads, but perform specifi ed interruption on rated overcurrents. 2,000 Specify inertia delay by inserting an “F” in the part number as shown in Part Number Guide on previous page. 12 34 567 8 9 10 Pulse Width (ms) Pulse Peak Current 1. Percent of Rated Current = x 100% Protector Rated Current 2. Based on sinusoidal or parabolic pulse proŢle. 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 Multi-pole units can incorporate auxiliary and alarm contacts. Auxiliary and alarm contacts will not work with IDEC’s DIN rail adapters. USA: 800-262-IDEC Canada: 888-317-IDEC 885 Percent of Rated Current 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 Panel (NRAS only) Yellow NR5Y Colored caps fi t onto NRAS circuit breakers for color coding circuits White NR5H and improving the appearance of the panel. For use on main terminals only. Screw Terminal NRT Includes M3.5 clamp screw. Adapter (1 pair) For dimensions see page 892. Part Numbers: NRA Mounting Accessories For Number Part Description Appearance Remarks Model of Poles Number NRAN 68 mm 1-pole NR31 48.5 mm NRAR 24 mm NRAN 2-pole NR32 Use of a fl ush plate makes snap-in mount possible for 63 mm Panel Mount NRAN, and NRAR circuit breakers (tightening screws not Flush Plate necessary). Multiple units can mount in a single panel cut-out. NRAN 3-pole NR33 For 3-pole For 2-pole (Black plastic plate) For 1-pole 1-pole NR21 1. Furnished with a hold-down spring. Mounting Clip NRAS 2. Applicable only for series trip units up to 20 amps. 2-pole NR22 DIN Rail NRAN 3. Not applicable for NRAR lighted series. Plug-in Base 3-pole NR23 4. Not for use with circuit breakers incorporating auxiliary or alarm contacts. NRAR 1-pole NR211 1-pole NUS1 NRAS 2-pole NUS2 For 3-pole Surface Mount DIN Rail NRAN Plug-in Base For 2-pole 3-pole NUS3 For 1-pole Hold-Down Spring NRAR 1-pole NUS11 For dimensions of NRA series accessories and panel cut-out layouts, see drawings starting on page 891. 886 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRA Series Circuit Breakers 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 Series Current Trip Series Current Trip Series Current Trip Pilot Lights (NRAR only) with Auxiliary Contacts with Alarm Contacts Lead Wire LOAD LOAD Pilot Light A B LOAD Neon White White (120V AC) (Lead wire A) (Lead wire A) (Lead wire B) (Lead wire B) Neon (~) Black Black (240V AC) C C Dashed lines represent NRAR illuminated rocker units. Lead wires NO NC for neon pilot light as shown above. (~) NC NO LINE LINE LINE Time Delay Curves (numerical equivalent) Overcurrent — Time Delay Characteristics in Seconds (at 25ºC) Percent of Rated Current Curve 100% 125% 150% 200% 400% 600% 800% 1000% 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 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 MD No trip 35 – 400 20 – 200 7 – 60 1.3 – 8 0.2 – 3 0.01 – 0.25 0.006 – 0.08 1. All values above are in seconds. 2. Data in this table is equivalent to information presented in the time delay curves shown on page 888. USA: 800-262-IDEC Canada: 888-317-IDEC 887 DC AC (50/60Hz) NRA Series Circuit Breakers Time Delay Curves – NRA Series 1000 1000 Curve AA Curve BA 100 100 (at 25ºC) (at 25ºC) 10 10 1 1 0.1 0.1 0.01 0.01 100 150 300 400 500 600 700 800 900 1000 100 150 300 400 500 600 700 800 900 1000 200 200 125 125 Current (percent load of the rated current) Current (percent load of the rated current) 1000 Curve MA 100 (at 25ºC) 10 1 0.1 0.01 100 150 300 400 500 600 700 800 900 1000 125200 Current (percent load of the rated current) DC Time Delay Curves 1000 1000 Curve AD Curve MD 100 100 (at 25ºC) (at 25ºC) 10 10 1 1 0.1 0.1 0.01 0.01 100 150 300 400 500 600 700 800 900 1000 100 150 300 400 500 600 700 800 900 1000 125200 125200 Current (percent load of the rated current) Current (percent load of the rated current) 888 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights Time in sec Time in sec Time in sec Time in sec Time in sec Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRA Series Circuit Breakers Resistance and Impedance Characteristics Impedance Correction Curve Coil Data 100 AC Impedance DC Resistance (50/60Hz) Rated Current Curves Curves 10 Curves AA, BA, and MA AD, MD AA, BA, MA 0.3A 9.67Ω 9.82Ω 1 0.5A 3.24Ω 3.36Ω 0.75A 1.45Ω 1.49Ω 0.1 1A 0.90Ω 0.92Ω 2A 0.21Ω 0.21Ω 0.01 3A 0.09Ω 0.092Ω 0.001 0.01 0.1 1 10 100 Impedance (Ω) 5A 0.036Ω 0.036Ω 7.5A 0.017Ω 0.018Ω Resistance Correction Curve 10A 0.012Ω 0.012Ω 100 15A 0.0066Ω 0.0068Ω 20A 0.0048Ω 0.0048Ω 10 Curves AD and MD 25A 0.0043Ω 0.0043Ω 30A 0.0036Ω 0.0041Ω 1 Tolerance ±25% (up to 20A), ±50% (25A and over). 0.1 0.01 Voltage Drop Due to Resistance or Impedance 0.001 0.01 0.1 1 10 100 Resistance (Ω) The internal resistance or impedance of a circuit breaker tends to be larger for a smaller rated current. Therefore, when circuit breakers with a small rated current are used, voltage drop should be taken into consideration. Internal resistance Temperature Correction Curves also varies with time delay curves, even at the same rated current. This should 600 Curves AA, BA, MA, 500 AD, and MD also be considered during installation. 400 At the minimum tripping current (125% current) 300 Time Delay Curve and Ambient Temperature 200 Since NRA series circuit breakers employ an electromagnetic tripping system, 100 the rated current (trip current) is not affected by the ambient temperature, but 80 the time delay varies with the oil viscosity in the tube. Lower oil viscosity at 60 higher temperatures results in shorter delay; whereas at lower temperatures, the 40 delay will be prolonged. The time delay curves, shown starting on page 888, are -40 -30 -20 -10 0 10 20 30 40 at 25°C. Time delay curves can be corrected. 50 60 70 80 90 25 Ambient Temperature (ºC) USA: 800-262-IDEC Canada: 888-317-IDEC 889 Change of Time Delay (%) Rated Current (A) Rated Current (A) CNONC NRA Series Circuit Breakers Dimensions NRAS 1-pole • Tab terminal #250 (6.4W × 0.8t) 2-M3 Tab terminal #110 2-M3 mounting screw (2.8W × 0.5t) LINE OFF LOAD 0.2 40 19.1 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 19.1 19.1 19.1 NRAS2111 NRAS2121 NRAS3111 NRAS3121 38.2 57.3 NRAS2111F NRAS2121F NRAS3111F NRAS3121F NRAN 1-pole • Tab terminal #250 (6.4W × 0.8t) 2-M3 Tab terminal #110 2-M3 mounting screw (2.8W × 0.5t) LINE OFF LOAD 19.1 4.5 41 NRAN1111 NRAN1121 16.5 50.5 NRAN1111F NRAN1121F 54.6 2-pole 3-pole • • 6-M3 4-M3 OFF OFF OFF OFF OFF 19.1 19.1 19.1 NRAS2111 NRAN2121 NRAN3111 NRAN3121 57.3 38.2 NRAS2111F NRAN2121F NRAN3111F NRAN3121F NRAR Indicator wire Tab terminal #250 (Indicator terminal) LOAD LOAD ON OFF LINE LINE 56 56 Tab terminal #110 65.5 65.5 (2.8W × 0.5t) 70.5 69.6 890 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights 52 52 50.6 42.2 42.2 42.2 31.5 31.5 30.8 Approx. 60º Approx. 60º NP CNO NC CNO NC 9.2 17.3 CNC NO 40 CNC NO 16.6 8.2 16.6 8.2 40 40 CNO NC CNO NC NP 8.2 16.6 CNC NO CNC NO 40 CNO NC CNO NC CNC NO CNC NO Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRA Series Circuit Breakers Panel Cut-Outs NRAS Series NRAR, NRAN ø4 Mounting hole ø4 Mounting hole ( ) 9.8 19.1 19.1 1-pole 19.6 19.1 19.1 2-pole 38.7 1-pole 19.6 38.7 2-pole 57.8 3-pole NR31, NR32, NR33 – Panel Mount Flush Plate 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°. Maximum Mounting Distance Model A B Dimensions (mm) Mounting to Panel Surface Mounting to DIN Rail NRAS 3.02” (77.5mm) 3.57” (91.5mm) Mounting on a panel surface Mounting on a DIN rail 19.1 mm 20.2 mm 26 mm DIN rail NRAN 3.02” (77.5mm) 3.57” (91.5mm) 2-ø3.5 Mounting hole NRAR 3.38” (86.7mm) 3.93” (100.7mm) AB USA: 800-262-IDEC Canada: 888-317-IDEC 891 +0.3 ø16 0 26.7 42.2 ±0.25 55.5 42.2 5.1 32 5.1 9mm 75 mm NRA Series Circuit Breakers 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) B 1.14” (29mm) C 0.78” (23mm) F D 1.2” (31mm) E 0.41” (10.5mm) F 0.11” (3mm) G H A G 2” (51mm) K B D C H 0.47” (12mm) K 0.16” (4mm) H Overall length 39.4" (1000mm) 892 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights