Download BrochureTesting & calibration of relays
Relay Testing:
It works on the principle of an electromagnetic attraction. When the circuit of the relay senses the fault current, it energizes the electromagnetic field which produces the temporary magnetic field. This magnetic field moves the relay armature for opening or closing the connections.
- Over Current Relay
- Earth Fault Relay
- Instantaneous Earth Fault Relay
- Instantaneous Differentials
- Sensitive Earth Fault Relay
- Neutral Displacement Relay
- Under Voltage Relay
- Over Voltage Relay
- Instantaneous Under Voltage Relay
- Instantaneous Over Voltage Relay
- Trip Circuit Supervision Relay
- Tripping Relay
- Master Tripping Relay
- High Speed Tripping Relay
- Auxiliary Relay
- Fuse Failure Relay
- DC Failure Relay
- Synchronizing Relay
- Transformer Differential Relay
- Buchholz Relay,
- Over Current Relay & Earth Fault Relay
- Motor Protections
- Feeder Protections
- Thermal Overload Relay
- Transformer/Line Differential
- Generator Protections
- Reverse Reactive Relay
- Differential/Directional Relay
- Voltage Protection Relay
- Distance Protection Relay 34 HV No Voltage Relay
- Maximum Demand Controller Relay
- Vector Surge Relay
- Trip Circuit Supervision Relay 36 Protection Fuse Supervision Relay
- Definite Time Relay 37 Automatic Voltage Regulating Relay
- Check internal wiring.
- Megger all terminal body.
- Megger AC to DC terminals
- Check operating characteristics by secondary injection.
- Check minimum pick up voltage of DC coils.
- Check operation of electrical/ mechanical targets.
- Check CT connections with particular reference to their polarities for differential type relays.
- Relay settings.