Distribution box is the general name of motor control center. surface plastic Distribution Box is according to the requirements of electrical wiring switch equipment, measuring instruments, protective appliances and auxiliary equipment assembled in closed or semi-closed metal cabinet or screen, constitute a low-voltage distribution device. During normal operation, the circuit can be switched on or off by manual or automatic switch. Failure or abnormal operation with the help of protective appliances to cut off the circuit or alarm. By measuring instrument can display various parameters in operation, but also can adjust some electrical parameters, to deviate from the normal working state for hints or signals.
The utility of distribution box is easy to manage, when the occurrence of circuit failure is conducive to maintenance. Distribution box and distribution board of distribution cabinet are complete sets of devices for centralized installation of switches, instruments and other equipment. The commonly used distribution box has two kinds of wooden and iron plate system, now where the power consumption is quite large, so the use of iron is more. The use of distribution box: of course, it is convenient to stop and send power, play the role of measurement and judgment stop and send power.
Distribution box consists of two parts:
One is a complete set of components, that is, the surface plastic Distribution Box shell and related accessories.
The second is the electrical components and related accessories, that is, the air switch and its required accessories.
The cabinet consists of the following parts:
Circuit breaker: both switch, is the main components of the distribution cabinet, commonly used with air switch. Leakage switch. Dual power automatic switching switch.
Air switch:
Concept of air switch:
Air switch is also the air circuit breaker, in the circuit for connecting, breaking and bearing rated working current and short circuit, overload and other fault current, and can be in the line and load overload, short circuit, undervoltage and other cases, quickly broken circuit, reliable protection. Dynamic and static contacts and contacts of circuit breakers are designed in various types, but the main purpose is to improve the breaking capacity of circuit breakers. At present, the principle of limiting the peak value of short-circuit current by using certain contact structure is widely used to improve the breaking capacity of circuit breakers.
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