What are the steps maintaining SF6 (sulfur hexafluoride) circuit breakers?
Maintaining SF₆(sulfur hexafluoride) circuit breakers is a crucial factor for ensuring their long-term reliable operation and the safety of the power system.
What is Strengthen the monitoring of the moisture content of SF6 gas?
1.The main sources of moisture inside SF6 circuit breakers:
The volume fraction of moisture in the new gas for SF6 circuit breakers exceeds 8 x 10^-6.
2) Moisture that entered during the equipment assembly process;
3) The moisture released from solid insulating objects;
4) Moisture that seeps through the seals during operation;
5) During operation, air was frequently replenished, and moisture was introduced during the testing process.
2. Maintenance of mechanical components
Operation mechanism inspection:
Carry out lubrication and wear inspection for spring, hydraulic or pneumatic operating mechanisms.
Fastener inspection:
Check whether the fasteners such as bolts and connecting rods are loose to prevent mechanical failures.
3. Strengthen the monitoring of the gas pressure in SF6 circuit breakers
1)The meter reading should be conducted once a week. If necessary, the frequency can be increased according to the actual situation.
2) To ensure that the ambient temperature is as consistent as possible with the internal gas temperature of the SF6 circuit breaker, the meter reading time should be selected at the end of a period when the daily temperature is relatively stable.
4. Inspect the operating mechanism
The operation inspection of the spring operating mechanism is as follows:
1) When the circuit breaker is in operation, the power switch or fuse of the energy storage motor should be in the engaged position and must not be disconnected at will.
2) Inspect the storage motor. Ensure that the contact points of the travel switch are not stuck or deformed, and that the closing and opening coils do not emit smoke or have any unpleasant odors.
3) When the circuit breaker is in the open position, the opening lever should return to its original position, the opening lock should engage, and the closing spring should be energized.
4) For SF6 circuit breakers in operation, the good condition of the operating fuses should be checked using a multimeter every 6 months.
5. Environmental and Appearance Maintenance
Keep the enclosure of the circuit breaker clean to prevent flashover caused by dirt.
6. Regular Overhaul
A complete disassembly overhaul is carried out based on the operating years or the number of operations (such as after 10 years of operation or 2,000 operations).
7. Record and Data Analysis
Detailed records of the test data for each maintenance (such as gas pressure, moisture content, mechanical characteristics) should be kept. Trend analysis can be used to predict potential failures.
LTZ-40.5 indoor SF6 circuit breaker is produced by Shaanxi West Power Tongzhong Electrical Co., Ltd.is an indoor device used in AC 50Hz three-phase power system. It can be used in industrial and mining enterprises, power plants and substations for the control and protection of electrical equipment, and can be used in places where frequent operation is required, and can be used as a liaison circuit breaker and suitable for capacitor bank circuit breaker, and is a more ideal oil-free circuit breaker in the power system.
Strong breaking capacity: SF6 circuit breaker completes arc blowing by blowing out SF6 gas, its arc blowing speed is fast, arc burning time is short, and the breaking current is large, which can effectively protect the safety of medium and high voltage circuits. SF6 circuit breaker after disconnecting capacitive or inductive current, there is no danger of re-ignition and re-ignition.
Long electrical life: SF6 circuit breaker has a long service life, long overhaul cycle, and can adapt to frequent operation within a short period of time, with good safety and durability.
High insulation level: SF6 circuit breaker is using sulphur hexafluoride gas as insulation medium, the insulation level of this gas is extremely high.
Modular operation mechanism: SF6 circuit breaker adopts the modular spring operation mechanism which is independently developed by our company and adapted to the market popularity, which has good mechanical performance and convenient and quick maintenance in the later stage.
Should you have any requirements in these fields, please feel free to contact us as per following information:
Email: xdtz04@westpowerelectric.com
Website: https://www.xdtzelectrical.com/
Tel:+86 917 3661109
Mobilephone(whatsapp ): +86 18091765882
