Measures to prevent 10kV High Voltage Switchgear failure

  In recent years, a new round of reform has been carried out in the power industry, and the use of 10 kV high-voltage switchgear has become more popular
The switchgear not only maintains the stable operation of the power system, but also can disconnect the equipment under various fault conditions, ensuring the safety of equipment and operators
From the perspective of long-term development, power enterprises need to strengthen the fault diagnosis of 10kV high-voltage switchgear and take corresponding treatment measures to make it play a more comprehensive safety role in the system 1
material selection at the design stage of power system, attention shall be paid to the fault prevention of switchgear and necessary treatment shall be carried out for potential safety hazards
The key contents of switchgear design include: selection of primary components such as cabinet body and circuit breaker, comprehensive analysis of the performance of various components, and optimization of design from the aspects of stability and reliability, such as scientific distribution of components in the cabinet, so that the equipment can be operated in a more superior environment
Considering the actual needs of users, high-performance material assembly systems can be selected, such as imported materials for substations and switching stations, so as to improve the safety factor of equipment operation
2
creepage specific distance creepage specific distance is a key parameter in the design of high-voltage switchgear
The reliability of this index control affects the performance of normal operation of the system
According to the national standards, the external insulation creepage distance of each component in the high-voltage switchgear and its supporting insulating parts shall be not less than 18 mm/kv for pure porcelain insulation and not less than 20 mm/kv for organic insulation
In order to meet this functional requirement, the power unit shall strictly control the specifications of components and accessories, and try to find professional manufacturers to make them, so as to ensure the superior performance of the power system
3
in terms of safety, safe power use is the focus of long-term research in the power industry
The clear distance between each phase conductor in the cabinet and the ground must meet the power industry standard: the air gap between phases and the ground shall be more than 125 tnrn
If the composite insulation structure is used, the coordination of dielectric constant of insulation materials shall be strengthened, which not only helps to prevent the occurrence of personal injury accidents, but also avoids salt mist pollution flashover and the corrosion of harmful gases to the bus
4
in terms of environment, the external environment has a great impact on the accidents of high-voltage switchgear, and attention should be paid to the monitoring and control of the environment to prevent the occurrence of faults
For example, the ventilation window can be equipped with a mesh grid or filter screen to reduce the amount of dust entering the switch room, while the humid switch room can be equipped with an infrared lamp heating or dehumidification device to reduce the humidity
5
in terms of performance, relay protection is the protection structure of power system, which shall be designed and installed in strict accordance with the standards
It is usually necessary to continuously improve the adaptability of relay protection to changes in operation mode, so that it can better serve the operation of the system
In addition, when the capacity of the circuit breaker is insufficient, the relay should be replaced in time, and some important parameters should be redesigned
In a word, the high-voltage switchgear accident has a great impact on the performance of power system, which not only increases the construction cost of power engineering, but also poses a great threat to the life safety of operators
The operator shall take safety protection measures for the high-voltage switchgear in combination with specific standard requirements to reduce the occurrence rate of faults to ensure its performance

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