Electrical wiring distribution box is required by the switching equipment, measuring instruments, protection of electrical and auxiliary equipment assembly in a closed or semi-closed metal pieces on the screen or cabinet, constitute low voltage distribution equipment. With manual or automatic switch can be turned on or breaking the circuit during normal operation. With protection of electrical circuits or off alarm malfunction or improper operation. Measuring instrument can be displayed by running various parameters, but also on some electrical parameters can be adjusted for deviations from normal working condition for hints or signals. Commonly used in each hair, distribution, substation.
Easy to manage, when the electrical fault favor overhaul. Distribution box and distribution cabinet with power distribution switchboards, is focused on complete sets of equipment installation switches, meters and other equipment. Common distribution box with wooden and iron made in two, now where’s electricity came large, so it is still used more iron.
Press the structural characteristics and uses:
(1) Fixed panel switchgear, often called the switch board or power distribution panel. It is a kind of masking panels open switchgear, positive protective effect, back and sides still touching live parts, protection level is low, can only be used for low power continuity and reliability requirements of industrial and mining enterprises, as centralized power supply with a transformer room.
(2) protection type (ie closed) switchgear, means in addition to the mounting surface, all the other sides are closed up in a low-voltage switchgear. This switch cabinet, control, protection and monitoring electrical components are mounted in a steel or enclosure made of insulating material, can be mounted against a wall or away from the wall. There can be no isolation between the inside of each loop, can also be taken in isolation with a grounded metal plate or insulation panels. Typically the door and a main switch with a mechanical interlock. Another type of protection switchgear units (ie the console), equipped with a control panel, measuring, signaling and other electrical appliances. Protective switchgear technology is mainly used for site power distribution equipment.
(3) switch cabinet drawer. Such switchgear enclosure made of steel plate, inlet and outlet circuit electrical components are mounted on withdrawable drawer, constitutes a certain type of power supply to complete the task of functional units. Or between the functional unit and the bus cable, the function of the ground plate or plastic plate is spaced from the bus bar is formed, the three functional units and cable area.
There isolation between each functional unit. Switch cabinet drawer high reliability, safety and interchangeability, is more advanced switchgear, switchgear current production, the majority of switch cabinet drawer. They are suitable for industrial and mining enterprises requiring high reliability, high-rise buildings, as a distribution center centrally controlled.
(4) power, lighting, power distribution control box. Mostly closed vertical installation. Due to the use of different occasions, enclosure protection class is different. They are mainly used as industrial and mining production site power distribution equipment.