NRC Series Circuit Breakers 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 • 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 • Four curves available for standard or very short delay • Available in 11 rated currents from 300mA to 30A • UL1077 recognized “Supplementary Protectors” CSA Certifi ed UL Recognized File No. LR83454 File No. E68029 Specifi cations 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 Rated Interrupting Capacity (2-pole: 1,500A) SPDT contact output Auxiliary Contact 250V AC 3A (resistive load) 65V DC 1A (resistive load)) Reference Temperature 40ºC Operating Temperature –10 to +60ºC (avoid freezing) Insulation Resistance 100MΩ (500V megger) Between the live part and the ground, between terminals of different poles, between terminals Dielectric Strength 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 Weight (approximate) 1-pole: 115g, 2-pole: 230g Not suitable for branch circuit protection. 900 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 NRC Series Circuit Breakers 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: NRC 1 1 1L-30A-AA NRC 11 1 L — 30A — AA j Number k Auxiliary l Actuator Type m Rated Current n Time Delay of Poles Contacts Curve Part Number Codes: NRA Series Appearance Description Part Number Code Remarks 1-pole 11 j No. of Poles 2-pole 21 No 0 k Auxiliary Contacts Yes 1 Slide Leave blank Slide actuator available only for 1-pole models. l Actuator Type Lever L m Rated Current 0.3A, 0.5A, 1A, 2A, 3A, 5A, 7A, 10A, 15A, 20A, 30A n Time Delay Curve AC curves: AA, EA; DC curves: AD, ED 1. For NRC series accessories, see page 902. 2. For NRC series time delay curves, see page 903. 3. For NRC series dimensions, see page 905. USA: 800-262-IDEC Canada: 888-317-IDEC 901 NRC Series Circuit Breakers Accessories Part Numbers: DIN Rail and Mounting Clips Description Appearance Part No. Remarks For dimensional drawing, Aluminum DIN Rail (1 meter length) BNDN1000 see page 908. DIN Rail End Clip Metal end clip used to prevent side-to-side movement of circuit breakers when mounted on a DIN BNL5 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 with For dimensional drawings, auxiliary contacts (NRC111, NRC111L, NRC211L). When mounting 2-pole models (NRC210L), use NRC-M see page 907. two brackets side-by-side. It is recommended to use the “Fast-On Tab Terminal Adapter” (below) when using this bracket. Surface Mounting Bracket For dimensional drawings, NRC-F Used for direct surface mounting 1-pole circuit breaker models. see page 907. Fast-On Tab Terminal Adapter Adapter used for Fast-On wiring termination. Fast-On tab extends 0.47” (12mm) in length. Cannot NRC-T be used to replace models with M5 main terminals (30A). Fast-On terminal adapter recommended 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 907. Internal Circuits and Terminal Arrangements 1-pole 1-pole 2-pole 2-pole without auxiliary contact with auxiliary contact without auxiliary contact with auxiliary contact Type NRC110, NRC110L NRC111, NRC111L NRC210L NRC211L LINE LINE LINE LINE LINE LINE Series Trip LOAD C NO NC LOAD LOAD LOAD C NO NC LOAD LOAD 902 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 NRC Series Circuit Breakers Time Delay Curves (numerical equivalent) Overcurrent — Time Delay Characteristics in Seconds (at 40ºC) Percent of Rated Current Curve 100% 125% 150% 200% 400% 600% 800% 1000% AA No trip 40 – 240 10 – 50 3.5 – 18 0.9 – 4 0.35 – 2 0.07 – 1.2 0.01 – 0.5 EA 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 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 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 1. All values above are in seconds. 2. Data in this table is equivalent to information presented in the time delay curves below. Time Delay Curves AC (50/60 Hz) Time Delay Curves DC Time Delay Curves 1000 1000 Curve AA Curve AD 100 100 (at 40ºC) (at 40ºC) 10 10 1 1 0.1 0.1 0.01 0.01 100 150 200 100 150 200 300 400 500 600 700 800 900 1000 300 400 500 600 700 800 900 1000 125 125 Current (percent load of the rated current) Current (percent load of the rated current) 1000 1000 Curve EA Curve ED 100 100 (at 40ºC) (at 40ºC) 10 10 1 1 0.1 0.1 0.01 0.01 100 150 200 100 150 200 300 400 500 600 700 800 900 1000 300 400 500 600 700 800 900 1000 125 125 Current (percent load of the rated current) Current (percent load of the rated current) USA: 800-262-IDEC Canada: 888-317-IDEC 903 DC AC (50/60Hz) Time in sec Time in sec Time in sec Time in sec NRC Series Circuit Breakers Resistance and Impedance Characteristics Coil Impedence (at 40ºC) AC Impedance at 40ºC Rated AC Impedance DC Resistance Correction curve of impedance Current (50/60Hz) 100 between terminals (at 40ºC) 0.30A 15.1Ω 25.6Ω 0.50A 5.58Ω 9.04Ω 10 1A 1.54Ω 2.33Ω 2A 0.341Ω 0.548Ω 1 3A 0.162Ω 0.261Ω 5A 0.061Ω 0.099Ω 0.1 7A 0.031Ω 0.048Ω 0.001 0.01 0.1 1 10 100 Impedance (Ω) 10A 0.017Ω 0.026Ω Tolerance: 0.3A to 3A ±10% 15A 0.008Ω 0.013Ω 5A to 30A ±25% 20A 0.0058Ω 0.0075Ω DC Resistance at 40ºC 30A 0.0039Ω 0.0046Ω Tolerance: ±10% (0.3A to 3A), ±25% (5A to 30A). Correction curve of resistance 100 between terminals (at 40ºC) 10 Voltage Drop Due to Resistance or Impedance The internal impedance of a circuit breaker tends to be larger for a smaller rated current. Therefore, when low rated circuit breakers are used, voltage drop should 1 be taken into consideration. 0.1 0.001 0.01 0.1 1 10 100 Resistance (Ω) Tolerance: 0.3A to 3A ±10% 5A to 30A ±25% Temperature Correction Curves Curves AD and MD At the minimum tripping current 400 (125% current) 300 200 100 80 60 40 –40º –20º 0º 20º 40º 60º 80º Ambient Temperature (ºC) 904 www.idec.com Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights Change of time delay (%) Rated Current (A) Rated Current (A) Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRC Series Circuit Breakers Dimensions: NRC Series Main terminal NRC110 M4 screws (20A max.) 71.2 2-ø4.5 hole M5 screws (30A) Slide Actuator 23 12 1-Pole without Auxiliary Contacts NP OFF 15 25 4 64 DIN rail Main terminal NRC110L M4 screws (20A max.) 2-ø4.5 hole M5 screws (30A) Lever Actuator 77.2 12 1-Pole without Auxiliary Contacts 23 NP OFF 15 10 64 25 DIN rail Main terminal NRC111 M4 screws (20A max.) 2-ø4.5 hole M5 screws (30A) 71.2 Slide Actuator 23 12 1-Pole with Auxiliary Contacts NP OFF 15 4 64 25 DIN rail Auxiliary terminal M3.5 screws 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°. USA: 800-262-IDEC Canada: 888-317-IDEC 905 64º 63.5 63.5 63.5 54 54 54 45.5 9.5 45.5 45.5 TRIP TRIP TRIP 68 68 68 NRC Series Circuit Breakers Dimensions: NRC Series, continued Main terminal NRC111L M4 screws (20A max.) M5 screws (30A) 2-ø4.5 hole Lever Actuator 77.2 12 1-Pole with Auxiliary Contacts 23 NP OFF 15 10 64 25 DIN rail Auxiliary terminal M3.5 screws Main terminal NRC210L M4 screws (20A max.) M5 screws (30A) 4-ø4.5 hole Lever Actuator 77.2 37 2-Pole without Auxiliary Contacts 23 NP NP OFF OFF 15 10 64 50 DIN rail Main terminal NRC211L M4 screws (20A max.) 4-ø4.5 hole M5 screws (30A) Lever Actuator 77.2 37 23 2-Pole with Auxiliary Contacts NP NP OFF OFF 15 10 64 50 DIN rail Auxiliary terminal M3.5 screws 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°. 906 www.idec.com 64º Circuit Breakers Terminal Blocks Timers Relays & Sockets Display Lights Switches & Pilot Lights 63.5 63.5 63.5 54 54 54 9.5 45.5 45.5 64º 9.5 45.5 64º TRIP TRIP TRIP 68 68 68 Circuit Breakers Switches & Pilot Lights Display Lights Relays & Sockets Timers Terminal Blocks NRC Series Circuit Breakers Panel Cut-Outs NRC Series Surface Mounting Hole Layout 1-Pole Surface Mounting Hole Layout 2-Pole 2-M4 37 12 2-M4 Panel Cut-Out (when using NRC-M) 25.5 4-ø4 2-ø4 25.5 51 (1-pole type) (2-pole type) Accessory Dimensions Panel Cut-Out Mounting Adapter (NRC-M 23.5 1.2 60 2 12.5 12 6.5 9 16 R5.5 2 R5 2-M4 2-M3 4 NRC-M Panel Mounting Bracket Surface Mounting Bracket (NRC-F) NRC-F Surface Mounting Bracket USA: 800-262-IDEC Canada: 888-317-IDEC 907 46 56 54 26 54 46 56 45.6 56 54 NRC Series Circuit Breakers Accessory Dimensions, continued 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) 908 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 Instructions Circuit Breakers 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-circuit circuits and small-sized electrical equipment and provide excellent protection protection. Many combinations of protection mechanisms and internal circuit against overloads and short-circuits. connections enable wide applications. • Precision measuring instruments: electronic counters, projection Additionally, IDEC’s circuit breakers are designed to suit specifi c needs. Each instruments, oscilloscopes, industrial instrumentation, and analytic devices series offers unique circuit protection characteristics and a choice of actuator • Industrial machinery: printers, elevators, cranes styles. • Chemical and food industry machines: vacuum devices, wrappers, centrifuges, agitators IDEC’s Circuit Breaker Features • Machine tools: mill grinders, drills, presses • Various models are available with different tripping characteristics and • Business machines: vending machines, beauty salon equipment, enter- rated currents tainment games • 1- to 3- multi-pole • Other: offi ce equipment, air-conditioners, conveyor belts, and many more • Inertia delay • Auxiliary contacts and alarm contacts How the Breaker Operates • The electromagnetic tripping system is not affected by ambient temperature • Safe trip-free mechanism IDEC’s hydraulic magnetic circuit breakers operate like a solenoid coil. The coil unit consists of an oil-fi lled tube with a metal core at one end and a pole piece • Vibration- and impact-resistant design and armature at the opposite end with a spring in between. • When using accessories such as plug-in bases, fl ush plates, and colored caps, a variety of mounting styles is possible — such as DIN rail mounting, When a current load passes through the coil winding, it creates a magnetic snap mounting into panel cut-outs, and color-coded arrangement on the panel fi eld. As long as the current load is either at or below the nominal rating of the breaker, the metal core will remain stationary. Mounting Instructions: Installation Angle If the current load increases beyond the nominal rating, the strength of the Designed to be mounted on a vertical surface, the circuit breakers should be magnetic fi eld causes the core to move toward the pole-end of the tube. The oil mounted on a surface within 10° of the vertical plane. If the circuit breaker is viscosity regulates the core’s movement through the tube, thereby regulating the mounted on a horizontal surface or at any angle other than the specifi ed angle, time delay. As the percentage of current load increases, the required trip time of its characteristics will be changed. the breaker decreases and vice versa. When the current reaches the overload rating, the metal core will meet the pole Multi-Pole Assemble piece at the opposite end of the tube. At this point, the armature is attracted to the same pole piece, tripping the breaker. 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 produce In case of sudden short circuit, the magnetic fi eld created will instantly trip multi-pole units. the breaker. Internal Circuits Overview Description Circuit Example Series Trip This is the most common circuit breaker, providing overload and short circuit protection. It Load can also be used as an ON/OFF switch. Series Trip with Auxiliary Contact 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 USA: 800-262-IDEC Canada: 888-317-IDEC 909