Industrial grade Auto Main Failure Panel is used to bring a stand-by generator on line automatically on failure of main supply source. The Auto Main Failure Panel is designed with bus voltage relay which senses the bus voltage, as soon as voltage is dropped behind pre-set point, the further cycle is started. The Auto Main Failure Panel is provided with over-voltage alarm and over current and earth fault alarm. Industrial grade Auto Main Failure Panel is application specific in design and accurate in dimension.