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NDB1L-32 Series Residual Current Action Circuit Breaker
Updated:August 12,2022 16:12PM

Nader NDB1L-32 residual current operated circuit breaker is mainly used for low-voltage terminal power distribution system with AC rated working voltage of 230V and 400V and pole number of 1PN, 2P, 3P, 3PN and 4P. It is suitable for low-voltage terminal power distribution in industries, civil buildings, energy, communications and infrastructure, and has the functions of short-circuit protection, overload protection, leakage protection or overvoltage protection.
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NDB1L-32 Series
NDB1L-32 Series
NDB1L-32 Series
NDB1L-32 Series


Features of NDB1L-32 Series

  • When MCB normally open or trip because fault, the phase line and neutral line should keep disconnected status to avoid the electric hurt by electrified neutral line
  • Full Protection Functions with overload and short-circuit protection. When connect or do breaking operation, you should connect the neutral line at first, then do breaking operation
  • Connection is safety and reliable: use "Frame" connection structure
  • Easily mounting: TH35 standard mounting rail


Technology data

Technology data of NDB1L-32 Series

Rated residual making and breaking capacity (IΔm) 500A
Altitude ≤2000m
Ambient temperature -25℃~+55℃
Meet a criterion IEC 61009-1, IEC61009-2-2, UL1053
Instantaneous Tripping Characteristic type C


Datasheet of NDB1L-32 Series




Questions & Answers for NDB1L-32 Series

  • What is the function of miniature circuit breaker?
    A Miniature Circuit Breaker (MCB) is an automatically operated electrical switch used to protect low voltage electrical circuits from damage caused by excess current from an overload or short circuit.
  • What is miniature circuit breaker how it works?
    A miniature circuit breaker (MCB) automatically switches off the electrical circuit during an abnormal condition of the network means in overload condition as well as faulty condition. Nowadays we use an MCB in a low voltage electrical network instead of a fuse. Handling an MCB is electrically safer than a fuse.
  • What is mean by miniature circuit breaker?
    miniature circuit breaker: a small trip switch operated by an overload and used to protect an electric circuit, esp a domestic circuit as an alternative to a fuse.
  • How does a house breaker work?
    Inside each circuit breaker is a spring hooked over a small piece of solder (a melt-able fusible alloy). Each breaker is connected to an electrical wire that runs through your house. The electricity that flows through your house runs through the solder.
  • What is the advantage of miniature circuit breaker?
    MCB (Miniature Circuit Breaker) is a circuit breaker with optimum protection facilities of overcurrent and short circuit only. Its basic function is to detect the fault condition and interrupt the current flow. it avoids overheating in case of excess current & provides fire protection.
  • 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).