Chint brand NB1-63 6kA NB1-63H 10kA MCB 6A 10A 16A 20A 25A 32A 40A 50A 63A 1P 2P 3P 4P CE CB UL1077 Chnt Mini Circuit Breaker

Chint brand NB1-63 6kA NB1-63H 10kA MCB 6A 10A 16A 20A 25A 32A 40A 50A 63A 1P 2P 3P 4P CE CB UL1077 Chnt Mini Circuit Breaker

Chint NB1-63 Miniature Circuit Breaker

1. General

1.1 Function

      protection of circuits against short-circuit currents, protection of circuits against overload currents, switch,isolation.
      NB1-63 circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems.

1.2 Selection
      Technical data of the network at the point considered:
      short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,       network normal voltage.
      Tripping curves:
      B curve (3-5In) protection for people and big length cables in TN and IT systems.
      C curve (5-10In) protection for resistive and inductive loads with low inrush current.
      D curve(10-14In) protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers,             breakdown lamps).