Final answer:
A lockout/tagout device is used to provide a visible break when work is to be performed on a trolley breaker, ensuring it is properly isolated and cannot be operated accidentally.
Step-by-step explanation:
The equipment that provides a visible break when work is to be performed on a trolley breaker is a lockout/tagout device. This device is used to ensure that the trolley breaker is properly isolated and cannot be operated accidentally during maintenance or repair work.
A lockout/tagout device typically consists of a lock and a tag. The lock is used to physically secure the trolley breaker in the off position, while the tag provides a visible warning and information about who is working on the equipment and when the work is expected to be completed.
By using a lockout/tagout device, the trolley breaker can be safely and effectively maintained or repaired without the risk of accidental operation, preventing potential harm to the person working on it.