When should circuit breaker contacts typically be lubricated?

Circuit breaker contacts should typically be lubricated in corrosive atmospheres to prevent degradation and ensure reliable operation. In environments where moisture, chemicals, or other contaminants can lead to corrosion, lubrication helps maintain the integrity of the contacts, reducing wear and enhancing conductivity. Regular lubrication in these specific conditions can significantly extend the life of the circuit breakers and improve their performance and safety.

In contrast, lubricating contacts regardless of conditions may lead to contamination, and unnecessary maintenance can introduce more issues than it resolves. Limiting lubrication to humid conditions or only when malfunctioning does not account for the proactive measures needed to protect contacts in corrosive environments, which are directly tied to operational reliability. Thus, tailoring lubrication practices based on environmental conditions is essential for effective maintenance.