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Views: 0 Author: Site Editor Publish Time: 2022-03-15 Origin: Site
The main function of medium voltage switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and electric energy conversion in the power system. It is mainly composed of circuit breaker, disconnector, load switch, operating mechanism, transformer and various protective devices.
What is the role of medium voltage switchgear?
What are the classifications of medium voltage switchgear?
How many types of medium voltage switchgear can be classified according to the insulation medium in the cabinet?
Don't talk about high voltage electricity, even ordinary electrical appliances are impossible to bear. Then the question arises, how can we make these high voltage electricity and transformer safe contact? At this time, the medium voltage switchgearis here. Here is a very crucial step. The high voltage is first transmitted to the power supply bureau, and this medium voltage switchgear is also set in the power supply bureau. By controlling the low-voltage switchgear, the high-voltage power is controlled to contact the contact cabinet in the power supply bureau, and then the transformer will The high-voltage electricity is converted into household electricity and then output.
According to the structure of medium voltage switchgear, there are several classifications of medium voltage switchgear:
(1) Semi-enclosed medium voltage switchgear, the front and sides of the cabinet are closed, the back and the bus bar are exposed, the structure is simple, the cost is low, the safety is poor, and it is close to being eliminated, such as the GG1A type.
(2) The box-type medium voltage switchgear has a metal shell, but the number of compartments is small, and the bus bar is also enclosed, which has better safety. Such as XGN type.
(3) Interval type medium voltage switchgear, each room is separated by one or more non-metal partitions, and the safety type is better. Such as JYN type.
(4) Armoured medium voltage switchgear, each room is separated by metal partitions and grounded, with good safety, complex structure, high processing accuracy, and slightly higher price. Such as domestic KYN type, ABB company's ZSl type.
Can be divided into three categories:
(1) Air-insulated medium-voltage switchgear. The insulation between poles and poles is ensured by air gaps. The insulation performance is stable, the cost is low, and the cabinet has a large volume.
(2) In the composite insulated medium voltage switchgear, the insulation between poles and pole pairs is ensured by small air gaps and solid insulating materials. The cabinet is small in size, but its anti-condensation performance is slightly worse and the cost is higher.
(3) SF medium voltage switchgear. Gas insulation, all circuit components are placed in a closed container and filled with SF. gas. The technology is complex, the processing accuracy is high, and the price is expensive. This method is generally used in ultra-high pressure equipment.
Zhejiang Zhegui Electric Co., Ltd has worked on the production of medium voltage switchgears for over ten years. You can find the best medium voltage switchgear in this company.