Chint NB1-63 1 pole 2 pole 3 pole 480V MCB 1A 2A 3A 4A 6A 10A 13A 16A 20A 25A 32A 40A 50A 63A UL1077 Mini Circuit Breaker

Chint NB1-63 277V 440V 480V 50Hz 60Hz MCB  1 2 3 4 Pole 1 2 3 4 6 10 16 20 25 32 40 50 63 Amp 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).