What is high voltage switchgear equipment? High-voltage switchgear refers to electrical products used for power generation, transmission, distribution, power conversion and consumption in the power system to play the role of on-off, control or protection, with a voltage level of 3.6 kV to 550 kV, mainly including high-voltage circuit breakers, High-voltage isolating switch and grounding switch, high-voltage load switch, high-voltage automatic reclosing and segmenter, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switchgear.
The high-voltage switch manufacturing industry is an important part of the power transmission and transformation equipment manufacturing industry, and occupies a very important position in the entire power industry.
The main parts of the ten kilovolt switchgear include:
Vacuum circuit breakers, current transformers, locally installed microcomputer protection devices, operating circuit accessories (handles, indicator lights, pressure plates, etc.), various position auxiliary switches. Among them, the circuit breaker and current transformer are installed inside the switch cabinet, microcomputer protection, accessories and watt-hour meter are installed on the panel of the relay room (following the previous name, there is no relay in fact), the terminal block and various power air switches are installed inside the relay room, and the terminal block is connected with the circuit breaker mechanism through control cables or special sockets. The switch cabinet shall meet the relevant requirements of g B 3906-1991 "3-35 kV AC Metal Enclosed Switchgear". It is composed of two parts: cabinet body and circuit breaker, and has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection, etc. The cabinet is composed of a shell, electrical components (including insulating parts), various mechanisms, secondary terminals and connections. Operating requirements of high voltage switchgear:
The operator shall hold the special post operation certificate (high-pressure network access certificate), and the high-pressure operation must be carried out by two people, one for operation and one for supervision.
Operators must understand the status and working contents of the high-voltage switch cabinet, be familiar with the performance and operation methods of the high-voltage switch cabinet under operation, organize measures and technical measures according to the right during operation, and prohibit switching operation during lightning;
It is forbidden to operate the high-voltage ring network cabinet;
Before operating the six-amplitude sulfur switch cabinet, check whether the pressure gauge indication of the six-amplitude sulfur is within the normal range (not less than 5 atmospheres).
The tools used shall meet the standard of right use. Before operation, check the insulating gloves, insulating shoes and operating rod. If there is moisture, fracture and damage, and the insulation registration is lower than the voltage to be operated, the operation is prohibited.
The operation should wear insulation, wear insulation gloves.
Strictly follow the operation sequence.
After power failure, the warning sign shall be hung and locked on the high voltage switch cabinet.
