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NDM3L Series Molded Case Residual Current Action Protector
Updated:August 01,2020 18:11PM

The NDM3L series of molded case residual current action protectors (hereinafter referred to as protectors) apply to infrequent switching of circuits.

NDM3L-125-4P
NDM3L-250-4P-2
NDM3L-400-4P
NDM3L-630-3P

Description

Description of NDM3L Series

The NDM3L series of molded case residual current action protectors (hereinafter referred to as protectors) apply to infrequent switching of circuits with the AC 50Hz, the rated working voltage of AC 400V and rated working current of 630A as well as infrequent motor starting. With the overload, short circuit and undervoltage protection functions, the protector can protect lines and power equipment from damage. Meanwhile, they can deal with the personal safety, fire hazards and other potential risks caused due to long-term ground faults that can't be detected with the overcurrent protection function.

 

Features

Features of NDM3L Series

  • The protector can adopt packaged accessories for quick installation, thus responding to the user's requirements, without adjustment.
  • The protector can adopt packaged accessories for quick installation, thus responding to the user's requirements, without adjustment.
  • Adjustable on the site: 3-gear residual current, 3-gear delay time, to be adjusted by users according to the onsite demands.
  • Leakage tripping indication function: In case of leakage tripping for the product, the leakage tripping indication button will pop up.
  • Extremely strong work capacity in case of the working voltage failure: When the phase voltage is reduced to 50V, the residual current protection function can still be realized reliably.

 

Downloads and support

Find out more about NDM3L Series

NDM3-Series-MCCB-Datasheet.pdf

 

FAQs

Questions & Answers for NDM3L 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.

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