This series of double power supply automatic transfer switch is suitable for the automatic transfer between two power supplies in the emergency power supply system with AC rated working voltage (AC400V) and below, rated frequency (50HZ), rated current (32A to 630A), to ensure the continuous, safe and reliable operation of important loads (such as fire fighting load). It is widely used in hospitals, shopping malls, banks, chemical industry, high-rise buildings, fire protection and other important places where power failure is not allowed.

In normalusing,the controller should be placed inthe automatic position, The ATS is in the automatic control mode,The controller monitors both the main power and the backup power simultaneously and displays status.When the main power source has failure,such as power cut,under-voltage,over-voltage,or phase loss,The ATS will transfer to Standby power automatically.The power delay time is in 0-30 second.When the main power return,the ATS willtransfer from Standby power to Main power automatically.The controller is provided with a light-emitting diode to indicate condition of switch and power supply.

If you do not want the ATS switch automatically,or When other manual operations are required,you should setthe controller in Manual position.When it is in Manual mode,the ATS is not transfer automatically.

When the ATS is in automatic mode,if the main power supply and the standby power supply are in normal condition.TheATSwillgive priority