Protection Relay test
1. OBJECTIVE:- To verify the physical condition and electrical characteristics of protective relays.
2. TEST EQUIPMENTS REQUIRED:- Relay test unit 3 phase/ 1 phase
3. TEST PROCEDURE: –
3.1. MECHNICAL CHECKS AND VISUAL INSPECTION: –
Inspect for physical damage / defects.
– Check for nameplate information for correctness.
– Carryout visual check as per manufacturer recommendation.
– Check the wiring connections are as per approved drawing and verify tightness.
3.2. SECONDARY INJECTION TEST: –
This test is to confirm the electrical characteristics of protective or control relay and the healthiness of the same.
This will be carried out with relay alone (without external interfacing).
The secondary injection test shall be performed as per manufacturer precommissioning instructions and the forms shall be followed for record.
The relay shall be set for final approved setting.
3.3. PROTECTION / CONTROL FUNCTIONAL TEST: –
This test is to confirm the above tested relay is properly connected / interfaced with system, that required.
This will verify all inputs to relay and outputs from the relay are properly connected, as it required.
An injection (current/ voltage) shall be made and checked the functions outputs (trip, alarm, indication, control).
Inputs shall be initiated from the source and monitored the proper outputs from the relay.
4. APPLICABLE STANDARDS: –
IEC 60255: Electrical Relays.