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NDW1A Series Air Circuit Breaker
By:Nader Updated:May 15,2020 17:52PM


NDW1A series of universal circuit breaker (hereinafter referred to as circuit breaker) can be applied to the distribution network with AC of 50 Hz / 60 Hz, rated current of 200 A ~ 6300 A, rated insulation voltage of 1000 V, rated operational voltage of AC220V / 230 V / 240 V, AC380V / 400 V / 415 V, AC440V, AC660V / 690 V for distribution of electrical energy and protecting circuit and power equipment from overload, under-voltage, short circuit, single phase grounding and harm of other faults, and can also be used as isolation switch at the same time. The circuit breaker has multiple protection functions. It can avoid unnecessary sudden power failure while realizing highly accurate selective protection, and improve the reliability and security of the power supply system. 


◆ M or NWK21 — Conventional function, digital tube display, practical function and simplicity, which can adapt to the low-temperature places with the optional voltage measurement;
◆ 3M or NWK22 — Conventional function, LCD display, multiple and diversified functions, with optional voltage and harmonics measurement and protection functions. Applicable to high-end application places, and more powerful if applied to intelligent system;
◆ Measurement and protection: With current, voltage, frequency, phase sequence, power, power factor and harmonics measurement and protection functions;
◆ Current protection features: A variety of overload long-time delay protection, a variety of short circuit short-time delay protection, short circuit transient protection, ground protection, neutral line N-pole protection, current unbalance protection, MCR circuit breaker making capacity protection;
◆ Maintenance function:With fault record (8 times), historical current peak record, contact wear equivalent, query of operation times, clock function, self-diagnostic function, test function and fault display function;
◆ With a remote reset device ,realize remote recovery after fault tripping of the controller.


NDW1A series of universal circuit breaker has obtained China Compulsory Certification CCC, CE, TUV, RoHS for products.