Please note that these conditions will shorten the life of the circuit breaker.

Severe vibration environment (e.g., near railways, mines)

Impact:

• Loosening of mechanical parts: Bol, fasteners may loosen, leading to changes in mechanical characteristics, or even detachment of parts.
• False triggering: Microswitches, auxiliary contacts may misfire due to, sending incorrect signals
• Internal damage: Prolonged vibration may cause metal fatigue damage to the bellows of the vacuum arc chamber (extremely rare but serious)

Sand dust, wind and sand in harsh environment

Three, Countermeasures and Selection/Operation and Maintenance Suggestions
In response to the above challenges, the following measures should be taken at design selection, manufacturing, and operation and maintenance stages:
1. Special Environment Selection:
• Low-temperature type: Use low-temperature lubricating grease (such as silicone), low-temperature resistant sealing materials (such as fluororubber), configure a mechanism box heater (start in low temperatures), and select low-temperature storage batteries capacitance energy storage.
• High-temperature type: Select high-temperature insulation materials, increase the cross-section of the conductor to control the temperature rise, strengthen ventilation and dissipation, and use high-temperature stability lubricating grease.
• High-altitude type: Increase the creepage distance and air gap of external insulation, or adopt a enclosed gas-filled cabinet (C-GIS) design.
• Pollution-resistant type: Use insulators with strong pollution flashover resistance (such as big and small skirts, silicone rubber composite insulators), and increase the creepage distance.