The tripping mode of the molded case circuit breaker should be selected according to the type of circuit breaker tripping.

The tripping of the molded case circuit breaker manufacturer's molded case circuit breaker is divided into instantaneous tripping and overload tripping. Instantaneous and overload tripping is synthesized with a duplex trip, excluding split force tripping. Instantaneous and overload trips are inside the moulded case circuit breaker and pre-sales are usually added as an accessory to the moulded case circuit breaker. Split-force trips are trips of circuit breakers. Power trips are provided for minute using external power and are mainly used to remotely disconnect the circuit breaker.

Instantaneous trips are short circuit trips, typically 5-10 times (C trips) and 10-15 times (D trips) the rated current trips, overload trips are typically not released within 1.13 times the rated current for 1 hour and released within 1.45 times the rated current for 1 hour. It is a circuit breaker.

Motor distribution generally uses instantaneous trip breakers of 10-15 times rated current (Type D trip) and general distribution uses 5-10 times (Type C trip) circuit breakers.

The split-right detent depends primarily on whether remote operation is required. The split-right detent can only be detached remotely, and if the breaker needs to be closed remotely, an electric operating mechanism is required.

Circuit breakers are divided into B, C and D types, which refer to the circuit breaker tripping characteristic curve (current - tripping time). b characteristic is suitable for pure resistance loads and reduced lighting circuits, C characteristic is suitable for inductive loads and high inductive lighting circuits, and D characteristic is suitable for high inductive loads and distribution systems with high inrush currents.

Although the installation of plastic case circuit breakers is relatively easy compared to the installation of other electrical appliances, however, there are also some areas that need attention during the installation. Otherwise, a carelessness will cause some unnecessary trouble, I believe, these are not what you want to see it.

Plastic case circuit breaker installation requires attention to.

1, before installation should check whether the basic technical data on the sign meets the requirements

2, the plastic case circuit breaker should be installed vertically on the mounting rail, the upper end for the incoming line, the lower end for the outgoing line; handle facing down for disconnection; mounting rail with M5 screws first fixed in the rubber wood plate into a metal plate mouth (wiring plate); wiring plate then installed in the iron frame or wall bracket, for multi-level circuit breakers, should also be left phase single-level plastic case circuit breaker next to the round hole to lead to grounding wire

3, the connection wire shall not be exposed outside the terminal block, the cross-section of the wire must be in line with the rated current of the circuit breaker.