Answer Posted / singadurai58

Its very simple
Take an 230v auxillary contactor with 1NO POINT and 1NC POINT
One single phase connect at one side NO POINT and other end connect to contactor A1(NO VOLT COIL).A2NEUTRAL directly connected.
Positive (+) supply24 v connected at NC POINT one side and other end connected at generator starting switch .
When EB powersupply is there the contactor is on.
When EB supply cut through NC POINT the positive supply passing to the switch so the generator is on.
Its very cheap.

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