fish72a posted an update 1 week, 1 day ago
JXB3-63-1P 230V~ 1 Pole Miniature Circuit Breaker
Mode No: JXB3-63
Poles: 1P, 2P, 3P, 4P
Rated Current:6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
Breaking Capacity: 6KA
COO: Zhejiang, China
Certification: CE, ISO9000-2018, CCC
Installation type: Din rail
Packing: 1pc/shrink plastic, 12pcs/box, 240pcs/carton
HS Code: 8536200000
Transfer goods: Ocean, Air
Port: Ningbo, China
A MCB is very simple, easy to use and is not generally repaired. It is just easier to replace. The trip unit is the main part, responsible for its proper working. There are two main types of trip mechanism. A bi-metal provides protection against overload current and an electromagnet provides protection against short-circuit current.
If the circuit is overloaded for a long time, the bi-metallic strip becomes overheated and deformed. This deformation of Bi-metallic strip causes, displacement of latch point. The moving contact of the MCB is arranged by means of spring pressure, with this latch point, that a little displacement of latch causes, release of spring and makes the moving contact to move for opening the MCB.
The current coil or trip coil is placed so that during short circuit fault the magneto-motive force (mmf) of the coil causes its plunger to hit the same latch point and make the latch to be displaced. Again, when operating lever of the miniature circuit breaker is operated by hand, that means when MCB goes off position manually, the same latch point is displaced as a result moving contact separated from fixed contact in the same manner.MCB Breaker in stock