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NDW2 Series Air Circuit Breaker
Updated:August 12,2022 14:44PM

Nader NDW2 series ACB is applicable to the distribution network with AC 50Hz / 60Hz, rated current of 200A ~ 6300A, rated insulation voltage of 1250v and rated AC working voltage of 220V to 1140V. It is used to distribute electric energy and protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. It can also be used as an isolating switch. The circuit breaker has a variety of protection functions, which can not only achieve high-precision selective protection, but also avoid unnecessary sudden power failure, and improve the reliability and safety of the power supply system.
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Product family

NDW2 series of air circuit breakers have five frame types included, NDW2-1600, NDW2-2000, NDW2-3200, NDW2-4000, NDW2-6300.



Feature of NDW2 Series

  • The controllers are of full range and versatile.
  • Integrated communication network.
  • AC 1000 V Circuit Breaker (NDW2-4000).
  • Wind Power and Low-temperature Circuit Breakers (NDW2-2000/3200/4000).
  • Efficient Arc Extinguishing and Breaking Characteristics.

Technology data

Technical data of NDW2 Series

Circuit breaker NDW2-1600 NDW2-2000 NDW2-3200 NDW2-4000 NDW2-6300
Number of poles 3, 4 3, 4 3, 4 3, 4 3, 4
Rated current In     40℃ 200A~ 1600A 400A~ 2000A 2000A~3200A 800A~4000A 4000A~6300A
North pole rated current 100%In 100%In 100%In 100%In 100%In
Rated operational voltage Ue AC690V AC690V AC690V AC1000V AC690V
Rated limit short-circuit breaking capacity Icu (AC415V) 65kA 80kA 100kA 100kA 120kA
Rated operating short-circuit breaking capacity Ics (AC415V) 55kA 80kA 85kA 100kA 120kA
Rated short time withstand current Icw (AC415V) 1s 42kA 60kA 85kA 85kA 100kA
Controller Excluding controller
KM controller
KY controller
Installation type Fixed type
Drawout type
Special application Wind power, low-temperature circuit breaker -- --
Thermal-humidi ty type circuit breaker



Questions & Answers for NDW2 Series

  • What is the use of air circuit breaker?
    Air Circuit Breaker (ACB) is electronic equipment that is used for the protection of electric circuits from short circuits or overcurrent. The ACB operates at atmospheric pressure in air. ACB is used in the switching mechanism and protection of the electrical system.
  • Why is it called an air circuit breaker?
    It is a circuit breaker with compressed air as arc quenching medium to exterminate the arc produced when the contacts are separated. So this is called Air Circuit Breaker.
  • What is difference between VCB and ACB?
    The key difference between an air circuit breaker and a vacuum circuit breaker is current rating. With current rating from 1001 A to 10000 A, ACB (Air circuit breaker) is often used in Main Electrical Panels as well as for large industrial plant, where the breakers are arranged in drawn-out enclosures for ease of maintenance. The current rating of VCB (Vacuum circuit breaker) is up to 3000 Amperes and can be applied at up to 35 thousand volts.Contact C&S Electric for more information on air blast circuit breaker.
  • How many types of air circuit breakers are there?
    There are mainly two types of ACB are available. Plain air circuit breaker. Air blast Circuit Breaker.
  • What is difference between ACB and MCCB?
    An ACB is physically larger, but more cost-effective for higher ratings. current waveform (within five milliseconds in a 50 Hz system). The fault current flowing through the MCCB never reaches its peak, and the fault energy allowed downstream is limited.
  • How do you maintain a circuit breaker?
    Molded case Circuit Breakers should be exercised at least once per year. Routine trip testing should be performed every 3 to 5 years. Low-voltage Circuit Breakers should be inspected and maintained every 1 to 3 years, depending on their service and operating conditions.