Circuit breakers must be energized and de-energized using which device?

Circuit breakers are designed to interrupt the flow of electrical current in a circuit, primarily for safety and equipment protection. When it comes to the operation of these circuit breakers, they must be energized and de-energized following specific protocols to ensure safety and reliability. The correct device to use in this situation is disconnects.

Disconnects are specifically designed to safely isolate sections of an electrical system, allowing maintenance or operational changes to be carried out without risk of electrocution or equipment damage. They provide a physical separation that ensures the circuit is open before any work begins. This isolation is critical because maintaining safety protocols is paramount in electrical operations.

Using disconnects in conjunction with circuit breakers ensures a safe transition of the circuit's status from energized to de-energized and vice versa, maintaining operational integrity while protecting personnel and equipment. The other devices listed, such as transformers, voltage regulators, and insulators, serve different purposes within the electrical system, but do not meet the specific requirement for safely energizing or de-energizing circuit breakers.