(1) Classified according to the requirements of the power supply system
1) The first-level power distribution equipment is collectively referred to as the power distribution center. They are centrally installed in the substations of the enterprise, and the electrical energy is distributed to the subordinate distribution equipment in different locations. This level of equipment is close to the step-down transformer, so the electrical parameters are required to be higher, and the output circuit capacity is also larger.
2) Secondary power distribution equipment is the general name of power distribution cabinet and motor control center. The power distribution cabinet is used in the occasion where the load is relatively scattered and the circuit is less; The motor control center is used in the occasion of concentrated load and many circuits. They distribute the electrical energy of a certain circuit of the higher-level power distribution equipment to the nearest load. This level of equipment should protect, monitor and control the load.
3) The final power distribution equipment is generally called the lighting power distribution cabinet. They are located away from the power supply center and are decentralized, small-capacity power distribution equipment.
(2) Classification according to structural characteristics and use
1) Fixed panel switchgear, often called switchboard or power distribution panel. It is a kind of open switchgear with panel covering, the front has a protective effect, the back and side can still touch the live part, the protection level is low, and can only be used for industrial and mining enterprises with low requirements for power supply continuity and reliability, and is used for centralized power supply in the substation.
2) Protective (i.e., enclosed) switchgear refers to a kind of low-voltage switchgear that is enclosed on all sides except for the installation surface. The electrical components of the cabinet, such as switching, protection and monitoring control, are housed in a closed enclosure made of steel or insulating material, which can be reliably mounted on or off the wall. Each circuit in the cabinet can be isolated without isolation measures, or it can be isolated by grounded metal plates or insulating plates. Usually the door is mechanically interlocked with the main switch operation. In addition, there are protective tabletop switchgear (i.e. consoles) with control, measurement, signal and other electrical appliances on the panel. Protective switchgear is mainly used as a power distribution device at the process site.
3) Drawer-type switchgear. This type of switchgear is made of steel plate and the electrical components of the inlet and outlet circuits are installed in drawers that can be extracted, forming a functional unit that can complete a certain type of power supply task. The functional unit and the bus bar or cable are separated by a grounded metal plate or a functional board made of plastic to form three areas: the busbar, the functional unit and the cable. There is also isolation between each functional unit. Drawer-type switchgear has high reliability, safety and interchangeability, and is a relatively advanced switchgear. They are suitable for industrial and mining enterprises and high-rise buildings that require high power supply reliability, as power distribution centers with centralized control.
4) Power and lighting distribution control box. Most of them are enclosed vertical installations. Depending on the occasion of use, the enclosure protection level is also different. They are mainly used as power distribution devices at the production sites of industrial and mining enterprises.
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Causes:
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What is the material of the busbar?
A: Copper busbar, aluminum busbar and steel busbar.
What is the significance of busbar coloring?
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With the Rittal VX SE freestanding cabinet, the possibilities are endless
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