Reverse Power Relay may be a directional protecting relay that prevents/protect the generator from motoring result (going to reverse direction). it’s used wherever generator runs in parallel with alternative utility or generator.
Reverse Power Relay could be a directional protecting relay that prevents/protect the generator from motoring result (going to reverse direction). it’s used wherever generator runs in parallel with alternative utility or generator. The relay monitors the facility offer from the generator and just in case the generator output falls below a predetermined value, it quickly activates the trip and disconnects the generator.
The Numerical Relay is connected with the convention that the forward current is that the current flowing from the generator to the bus bar. This corresponds to positive values of the active power flowing within the forward direction. once a generator is working within the motoring mode, the machine is consuming active power from the ability system and if this active power crosses the set price, then once the set time delay the relay can operate to trip the Breaker.
Normally reverse power setting is kept but five hundredth of the driving power. as an example if the motoring power of turbine is four-dimensional then reverse power setting shall be unbroken but two. It shall even be noted that reverse power protection is supplied with a time delay of around five s to stop spurious operation because of disturbances or following synchronization.
- When the prime mover of a generator isn’t provision sufficient force to stay the generator rotor spinning at identical frequency because the bus goes to that the generator is meant to be connected, the generator can begin behaving sort of a motor and rather than provision power it’ll draw power from bus bar.
- During synchronization, it would be attainable to possess the synchroscope rotates slow (anticlockwise direction) then shut the breakup. beneath this condition. The generator would then be drawing current from the bus for rather than provision current through the bus (which happens once the breaker is closed with the measuring system rotates within the quick anticlockwise direction).
- Faulty Governor of the prime mover.
- Loss of excitation within the generator.