NHP's range of circuit breakers features a complete range of quality products for the protection of an electrical installation against overcurrents and short circuits in industrial, commercial and domestic applications. The range of circuit breakers includes air circuit breakers, moulded case circuit breakers and miniature circuit breakers (MCBs).
Circuit breaker selection is influenced by:

  • The magnitude of the prospective short circuit current determined by the size of conductors, the capacity of the supply transformer and the distance between the transformer and short circuit point
  • The required selectivity or association of the upstream circuit breaker or fuses and the downstream devices
  • The maximum nominal current required by the circuit
  • The expected initial current determined by the type of load
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