Industry Dynamic

Small plastic case circuit breaker knowledge introduction?


The mini-circuit breaker consists of fixed and mobile AC contactors, which are connected to transmission lines. The metal material or current carrying parts are made of electrolytic copper or silver-aluminum alloy, depending on the rated current of the disconnector.

When the contact point or load short circuit fault conditions are separated to produce an arc. All modern MCBS are designed to address the arc interruption processing, arc, and kinetic energy gained by the separation device of the arc through the water-cooled sheet metal material. There is an insulating layer that makes the plate material to hold in place. In addition, the arc through the flow channel is presented midway through the main circuit breaker to force an arc.

Organize the actual operation from magnetic trip and thermal trip devices.

Most magnetic field tripping devices are composed of composite magnetic system software. The system software has a spring-loaded buffer, magnetic elastic plug in silico hydrodynamics, and all magnetic jumps are normal. The current-carrying coil in the jumper moves the spring relative to the stationary pole. Therefore, when the electromagnetic coil generates sufficient electromagnetic field, magnetic resistance occurs on the tension-resistant liver. In the case of a short circuit fault or light load, the strong magnetic field caused by the solenoid, regardless of its position in the buffer, attracts the synchronous motor in the jumper liver.

By a pair of miniature circuit breaker tightly around the metal belt heater heat tripping device is winding magnetic coil, which leads to the hot liquid based on the current of the amount of the electric heater are immediately able to design, the current amount of bimetallic strip, which endanger the power supply circuit, electric current carrying conductor coil in the electromagnetic coil or indirectly carry double metal. The bimetallic sheet is rigid under certain loading conditions and then trips the intestinal tissue.

Bimetallic belts are made of two different metal materials, copper and steel. The metal material is riveted and welded along its length. The metal is designed this way, so they can't easily heat the plate to all the trip points of normal current. However, if the current exceeds the rated current, the strip will be heated, bent and tripped. Bimetallic sheet is selected under special load to show special delay time.