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NDU Series Surge Protector
Updated:August 12,2022 16:19PM

Nader NDU series surge protector (SPD) is used to protect the surge caused by lightning or other transient overvoltage, discharge the surge current on the power line to the ground, and limit the overvoltage. It is applicable to the power supply protection of industrial, construction, civil aviation, finance, securities, telecommunications, ports and other systems. It suppresses the instantaneous overvoltage amplitude of lightning and operating overvoltage, discharges the surge energy, and protects the safety of system circuits and equipment. Among them, ndu1 surge protector can be installed in the area of lightning protection LPZ0B/LPZ1, which is used to protect the aerial lines in the distribution system with AC 50Hz / 60Hz rated working voltage of 220V / 380V from direct lightning without attenuation
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Features of NDU Series

  • Maximum discharge current: 120KA (8/20 waveform), high-energy surge protection
  • Maximum continuous working voltage of different products: 255V~550V, DC600V, DC1000V for DC products
  • Built-in failure thermal tripping device for more safe use
  • 3+1 and common cabling types available, applicable to different grid types
  • The standard 35mm guide rail installation is supported
  • Pluggable module design for maintenance and replacement
  • With the failure indication and remote communication interface (with the NO and NC contacts)
  • With the anti-inverse mechanism



Certification of NDU Series

NDU series of surge protector has obtained China Compulsory Certification (CCC) for products.



Questions & Answers for NDU 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).
Tags: CCC NDU SPD 35mm