1. High-voltage switch - rated voltage 1kV and above is mainly used to break and close the electrical circuit of the conductive loop.
2. High-voltage switchgear - a general term for high-voltage switches and control, measurement, protection, regulating devices, and accessories such as accessories, housings and supports, and their electrical and mechanical connections.
3. Indoor high-voltage switchgear - does not have the performance of wind, rain, snow, ice and thick frost, suitable for installation in high-voltage switchgear used in construction sites.
4. Outdoor high-voltage switchgear - can withstand the effects of wind, rain, snow, pollution, condensation, ice and thick frost, suitable for high-voltage switchgear installed in the open air.
5. Metal-enclosed switchgear; switchgear - switchgear that is completely enclosed by a grounded metal casing, except for the incoming and outgoing wires.
6. Skid-mounted metal-enclosed switchgear—a metal-enclosed switchgear that is housed in a compartment separated by a grounded metal baffle, the main components (such as circuit breakers, transformers, busbars, etc.).
7. Spacer or metal-enclosed switchgear – like armored metal-enclosed switchgear, some of its components are also housed in separate compartments, but with one or more non-metallic barriers that meet certain levels of protection.
8. Box-type metal-enclosed switchgear - metal-enclosed switchgear other than armored, space-sealed metal-enclosed switchgear.
9. Inflatable metal-enclosed switchgear - A metal-enclosed switchgear with one of the following pressure systems for protecting gas pressure in the compartment of a metal-enclosed switchgear.
a. Controllable pressure system; b. Closed pressure system; c. Sealed pressure system.
10. Insulated enclosed switchgear - except for the incoming and outgoing wires, other switchgears that are completely enclosed by the insulated casing.
11. Combination electrical equipment - A device that combines two or more high-voltage electrical appliances into an organic whole according to the main wiring requirements of the power system, and the electrical appliances still maintain the original prescribed functions.
12. Gas-insulated metal-enclosed switchgear—closed-type combination electrical appliances, at least some of which are metal-enclosed switchgear that uses a gas above atmospheric pressure as an insulating medium.
13. Circuit breakers - Switching devices that can close, load, and interrupt the normal current of the operating circuit, and can also close, carry and break the specified overload current (including short-circuit current) within the specified time.
14. SF6 circuit breaker—a circuit breaker that is closed and opened in the sulphur hexafluoride gas.
15. Vacuum circuit breaker—A circuit breaker that closes and breaks the contacts in a vacuum.
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