Alternator Rotors and Reverse Power

If it is installed correctly, an overcurrent protection device will operate, disconnecting it from the power source.

Dear all,

An alternator under reverse power is same as a synchronous motor with a low load. It is nothing wrong with the alternator, but not good for turbine which is driving the alternator. If reverse power is continued, high pressure steam is delivered to low pressure chamber without loosing pressure and temperature. This will overheat the low pressure chamber of the turbine. That's why, alternator under reverse power must be disconnected from the network.

Regards