In the design and application of lighting electrical ready boards, the mechanical life of circuit breakers is a key indicator for measuring their reliability and durability. According to industry standards and actual product performance, the mechanical life of circuit breakers in lighting electrical ready boards generally exceeds 10000 operations, and this standard has been widely applied in the field of low-voltage distribution.

Definition and standard basis of mechanical life

Mechanical cycles refers to the number of mechanical opening and closing operations that a circuit breaker can perform without the need for component replacement. This indicator is verified by the manufacturer through rigorous testing and follows international and domestic standards. For example, the M2 level mechanical life test requires the circuit breaker to complete 10000 operating cycles, covering durability testing of core components such as auxiliary switches, opening and closing coils, and operating mechanisms. The experiment is conducted in an ideal environment, allowing maintenance methods such as lubrication and mechanical adjustment to extend the cycles of components and ensure reliability in actual use.

Performance in practical applications

Low voltage circuit breaker: In lighting electrical ready boards, the mechanical life of low-voltage AC miniature circuit breakers (MCBs) usually exceeds 20000 cycles, and some products can reach 30000 cycles. This type of circuit breaker uses high-strength materials and precision design to adapt to frequent operating scenarios, such as lighting circuit control in commercial buildings and industrial plants.

Medium voltage circuit breaker: Although lighting electrical ready boards are mainly low-voltage equipment, the mechanical life standard of medium voltage vacuum circuit breakers is also not less than 10000 times. The mechanical cycles of domestically produced medium voltage circuit breakers is generally between 20000-25000 cycles, with some high-end products reaching up to 30000 cycles, meeting the high reliability requirements of rail transit, data centers, and other industries.

Key measures to extend the cycles of machinery

Environmental control: Keep the electrical ready board dry, prevent condensation and corrosion, and maintain appropriate temperature and humidity.

Regular maintenance: Check the contact wear, spring tension, and mechanism lubrication after every 5000 operations, and replace aging parts in a timely manner.

Operating standards: Avoid forced closing after short circuit faults, reduce mechanical impact, and extend the service life of the operating mechanism.