Operation details of high and low voltage switchgear
Mar 15, 2021
High and low voltage switchgear equipment is used as electrical equipment for power transmission, distribution and electrical energy conversion. It is used for the control of power generation, transmission, distribution, power conversion and power consumption equipment. The product has a simple and reliable "five prevention" interlocking function to prevent misoperation. The appearance is novel, flat, concise, uniform in color, and thick and heavy. The secondary trunking in the high-voltage room is fully protected by metal, which makes the operation safer and more reliable. It has a more user-friendly man-machine interface, explosion-proof operation and other characteristics. The high-voltage switchgear equipment system is three-phase AC 50Hz, rated voltage 120Kv and indoor complete power distribution device. As power plants, substations and industrial and mining enterprises to receive and distribute electric energy, and has the functions of controlling, protecting and monitoring circuits.
In fact, the high and low voltage switchgear equipment enters the main control switch of the cabinet from an external line, and then enters the sub-control switch, and is set according to their needs. For example: meters, motor magnetic switches, AC contactors, etc. High and low voltage switch cabinets are divided into two categories, high voltage switch cabinets and low voltage switch cabinets. Each category has a separate installation and power distribution room.
What are the five preventions of high and low voltage switchgear?
1. After the vacuum circuit breaker in the high and low voltage switch cabinet is closed at the test position of the trolley, the trolley circuit breaker cannot enter or exit the working position.
2. When the domestic vacuum circuit breaker and grounding knife of the high and low voltage switchgear are closed, the grounding knife cannot be closed. Its function is to prevent closing with grounding wire.
3. After the vacuum circuit breaker and grounding knife in the high and low voltage switch cabinet are closed at the test position, the trolley circuit breaker cannot enter the working position. Its function is to prevent the load switch from closing.
4. When the vacuum circuit breaker in the high and low voltage switch cabinet is closing, the grounding knife cannot be put in. The rear door of the panel is locked with the machine on the grounding knife. Its function is to prevent live grounding wires.
5. When the vacuum circuit breaker in the high and low voltage switch cabinet is closed in operation, it cannot exit the working position of the trolley circuit breaker. The rear door of the panel is locked with the machine on the grounding knife and the cabinet door. Its function prevents accidentally entering the charged interval.
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Contact: Charles Du
Mobile: +86 18639199897
E-mail: Fengyuan800@outlook.com
