Pitfalls and Improvements Analysis of closing permission and loss of voltage criterion Logic in Backup Automatic Switch

Backup Automatic Switch ensures uninterrupted power supply by quickly putting in a standby power supply when the main power supply is out of operation due to a fault. Backup Automatic Switch in the process of operation by a variety of circumstances will be affected by the refusal to operate or false activation of the situation. This paper analyses the deficiencies in the logic of the closing permission and loss of voltage criterion of the Backup Automatic Switch, and puts forward corresponding improvement measures to effectively improve the success rate of the power supply Backup Automatic Switch action, and protect the normal operation of the power grid.