Protection Relays:
The function of the protection relay is to detect a dangerous condition in the circuit being monitored. The relays outputs are used to open the breaker, bringing it to safe levels until the fault can be rectified.
Feeder Protection Functions:
- Over Current
- Earth fault
- Sensitive earth fault
- Breaker fail protection
- Trip blocking
- Event tripping, using digital input
Power Factor Correction Functions:
- Breaker fail protection
- Peak repetitive over voltage and harmonics
- Thermal over current
- Fundamental frequency star point unbalance
- Fundamental frequency line current unbalance
- Fundamental earth fault current
- Fundamental frequency over voltage and over current
- Fundamental frequency ‘’H -bank’’ configuration unbalance
- Fundamental frequency under current
- Capacitor bank re-switching
- Event tripping
