In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers, generator circuit-breakers, and high-voltage circuit-breakers.

1. Load current cut-off: quickly cut off the load current to prevent overload or sudden change of load current from damaging the equipment.

2. Short-circuit protection: quickly cut off the current when a short circuit occurs to avoid further damage caused by the fault current and ensure the stability of the power system.

3. Protect substations and distribution systems: provide rapid response in substations and distribution networks to protect equipment from power fluctuations, short circuits or overload risks.

4. Frequently operated power systems: suitable for systems that require frequent switching, low maintenance requirements and long service life improve the stability and reliability of the power grid.

5. Smart grid and automation systems: combined with intelligent control equipment, provide remote operation, fault diagnosis and automatic recovery to improve the efficiency and reliability of the power system.

1. Regular inspection: Regularly check the appearance of the interrupter to ensure that there are no cracks, damage or contamination, and ensure that the equipment is well sealed.

2. Cleaning and dust removal: Clean the exterior of the interrupter and its related parts to avoid dust and contaminants, especially when working in a humid or dusty environment.

3. Check the contact parts: Check the wear of the contacts and other electrical connection parts to ensure that there is no oxidation or corrosion to avoid affecting the contact performance.

4. Check the vacuum seal: Check the sealing of the vacuum chamber to ensure that there is no vacuum leakage. The sealing of the vacuum system can be evaluated by testing equipment.

5. Test functionality: Perform operational tests regularly to ensure that the interrupter can work properly and quickly interrupt the current. Check its response time and arc extinguishing effect.

6. Lubrication: Perform necessary lubrication on moving parts (such as contacts and operating mechanisms) to ensure smooth operation and prevent wear and jamming.

7. Detect insulation performance: Test the insulation performance regularly to ensure that the interrupter can work stably under high voltage.

8. Preventive maintenance: Conduct a comprehensive inspection before operation in the power system to prevent equipment failure and ensure normal operation at critical moments.

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