1. Purpose: to verified operating condition of protective relay, Protection relays ensure the safety of an electrical system, protect equipment and provide operators with vital diagnostic information. They work by detecting faults and then tripping circuit breakers to prevent electrical energy from causing damage.
2. Scope: this procedure shall inject AC signaling current & voltage until output relay active, record time delay trip signal.
3. References and standards: Manufacture’s standards.
4. Testing Equipment: Relay Test Set