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NDM2 Series Molded Case Circuit Breaker
Updated:August 03,2020 09:26AM

Rated current from 10A 12.5A 16A 20A 25A 32A 40A 50A 63A 80A 100A 125A 140A 160A 180A 200A 225A 250A 315A 350A 400A 500A 630A 700A to 800A; Rated operational voltage (Ue) from 400/415VAC 500/550VAC to 690VAC; Rated limit short-circuit breaking capacity Icu (AC415V) from 25kA to 100 kA; including 3 poles and 4 poles.
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Description of NDM2 Series

The NDM2 series of molded case circuit breakers (hereinafter referred to as MCCBs) apply to infrequent switching of circuits with the AC 50/60Hz, the rated working voltage of AC690V and rated working current of no more than 800A as well as infrequent motor starting. With the overload, short circuit and undervoltage protection functions, the circuit breaker can protect lines and power equipment from damage. Products are widely used in the new energy, power, industrial control, real estate, electric power, telecom, rail transportation, project (public) construction and etc.

Product family
NDW2 series of air circuit breakers have seven types included, NDM2-63, NDM2-125, NDM2X-125, NDM2-250, NDM2-400, NDM2-630, NDM2-800.


Feature of NDM2 Series

  • Four types: C type (basic), L type (standard), M type (higher breaking) and H type (high breaking type) by the rated limit short-circuit breaking capability.
  • Smaller size, higher breaking capability.
  • Efficient short arcing, vibration resistance.


Datasheet of NDM2 Series




Questions & Answers for NDM2 Series

  • What is a molded case circuit breaker?
    Moulded Case Circuit Breakers Explained. ... A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.
  • What is the difference between MCCB and MCB?
    MCB is miniature circuit breaker which is used to break small currents. Like in domestic LT circuits. The ratings usually end up to 100 A. MCCB is a Module case circuit breaker which has a rugged construction as it can break larger currents usually from (100-1000A).
  • What is MCCB and its working?
    Molded Case Circuit Breaker (MCCB) is a circuit breaker and trip device assembled in a mould case. Also it can automatically cut off electric power in case of overload and short circuit. It is meant for higher rated current and is commonly used in Industrial applications.
  • What causes MCCB to trip?
    Circuit overloading is known to be the most common reason for circuit breaker tripping. It simply means that we're running too many heavy power-consuming devices at the same time on the same circuit. The next most dangerous cause is a short circuit.
  • How do molded case circuit breakers work?
    The traditional molded-case circuit breaker uses electromechanical (thermal magnetic) trip units that may be fixed or interchangeable. An MCCB provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device. Both these devices act mechanically on the trip mechanism.
  • Why we use Mccb instead of MCB?
    If evaluated from their power capacities, the MCB is essentially used for low-current requirements, such as, home wiring or small electronic circuits; while the MCCB is better used for high-power requirements. Type of electrical switch which protects the circuit from overload or short circuit.