High-voltage grounding switches are important safety equipment in power systems. When using them, it is necessary to clarify the prerequisites, comply with operating specifications, pay attention to safety protection, and strengthen maintenance and inspection. Stop operation immediately and report any abnormal situation. Improve the skill level and safety awareness of operators through training and education to ensure the safe and reliable operation of high-voltage grounding switches.
In power systems, high-voltage grounding switches are an important safety equipment. Their main function is to provide a safe grounding environment for maintenance personnel during equipment maintenance to ensure the safety of personnel and equipment. However, due to the particularity and complexity of their working environment, a series of precautions must be strictly observed when using high-voltage grounding switches.
Before using a high-voltage grounding switch, the prerequisites for its use must be clarified. First, ensure that the switchgear has been completely powered off and that there is no voltage through electrical testing. Secondly, before closing the grounding switch, it is necessary to check whether the mechanism of the grounding switch is flexible and free of jamming to ensure that it can be opened and closed normally. Finally, confirm that the grounding resistance of the grounding switch meets the specified requirements to ensure the grounding effect.
Operation sequence: During the operation, the operation should be carried out strictly in the prescribed sequence. Generally speaking, the circuit breaker or load switch should be disconnected first, and the grounding switch can be closed only after confirming that there is no voltage. After the maintenance work is completed, the grounding switch should be disconnected first, and then the circuit breaker or load switch should be closed.
Operation force: When operating the grounding switch, appropriate force should be used to avoid excessive force causing damage to the switch or insufficient force causing the switch to fail to open and close normally.
Operation speed: During the operation, the appropriate speed should be maintained to avoid being too fast or too slow. Too fast may lead to operational errors, and too slow may extend the power outage time and affect the reliability of power supply.
Keep a safe distance: When operating the high-voltage grounding switch, a sufficient safe distance should be maintained to avoid the risk of electric shock.
Wear protective equipment: Operators should wear protective equipment that meets the regulations, such as insulating gloves, insulating boots, etc., to improve their own safety protection level.
Set warning signs: Obvious warning signs should be set around the grounding switch to remind other personnel to pay attention to safety.
Regular inspection: The high-voltage grounding switch should be inspected regularly to ensure that it is in good condition. The inspection content includes the switch's opening and closing positions, mechanism flexibility, grounding resistance, etc.
Timely maintenance: When a problem is found with the high-voltage grounding switch, maintenance should be carried out in a timely manner. The maintenance process should be carried out in strict accordance with relevant regulations to avoid equipment damage or safety accidents caused by improper maintenance.
Record management: The inspection, maintenance and use of the high-voltage grounding switch should be recorded in detail for subsequent management and analysis.
