Difference between Miniature circuit breaker and Residual current circuit breaker

  Circuit breaker is a kind of mechanical switch device which can connect, carry and break the current under the normal circuit condition, and can also be connected with a certain time and breaking current under the condition of the abnormal circuit.

  Miniature circuit breaker and Residual current circuit breaker are the main kind of circuit breaker produced by Wenzhou korlen electric company. Although the both circuit breaker belongs to the same type of product, but there are still differences, and they have their own characteristics whether in principle or application,here are the difference between miniature circuit breaker and residual current circuit breaker.

  Miniature circuit breaker, referred to as MCB (Micro Circuit Breaker), is one of the most widely used terminal protection devices in the construction of electrical terminal distribution equipment. For under 125A current single-phase and three-phase short circuit, overload, over voltage protection, including 1P, 2P, 3P, 4P.And the miniature circuit breaker is composed of operating mechanism, contact, protection device (various release) and arc extinguishing system. The main contact is by manual or electric switch. When the main contacts are closed, free trip will lock in the closing position on the main contacts. The coil of over current release, the temperature element of thermal overload release and the main circuit are connected in series, in parallel coil of under voltage release and electric power. When the circuit is short circuited or serious overload, the armature is attracted over current release, the free trip action, and main contacts disconnect the main circuit. When the circuit is overloaded, the temperature element of thermal overload release generate heat to bend the bimetal sheet, promoting free trip action. When the circuit under voltage, the armature of under voltage release deliver, also make the free trip action.

  The features of Residual current circuit-breaker is that it have a switch that is capable operate automatically when leakage current exceeds a predetermined value in a circuit. And commonly used circuit breakers are divided into two types of voltage and current, and the current type is divided into electromagnetic and electronic type of the two. Leakage circuit breaker is used to prevent personal electric shock, it should be based on two different requirements of electric shock protection, direct contact and indirect contact. It is chose according to the purpose of use and the location of electrical equipment.

  After reading the difference between miniature circuit breaker and residual current circuit breaker, you have a certain degree of understanding of them, and then you can  better choose the circuit breaker you need.