The dual-power automatic transfer switch () is a newly developed miniature household power transfer switch, is mainly used to test whether the main power or reserve power is normal. The is suitable for emergency power supply systems of AC50 or 60Hz and rated voltage 400V. It is featured with firm structure, reliable transfer, easy installation and maintenance, and , is widely used in where frequent power outage is not allowed. Both electric and operation and manual operation are available. The is composed of and controller. According to the standard GB/T14048.11 Part 6-1: Multiple function equipment - Transfer switching equipment, know that is the most suitable low-voltage switchgear and control device. Manual/automatic operation: Excessive silver alloy loss may occur during manual power generation and power down. Therefore, set the selector switch at the manual position under normal condition, and pull it to the manual position when all power is turned off to check and maintain the and contacts. After the manual operation is completed pull the selector back to the automatic position. Control circuit: will be active in an instant. After the conversion is complete, the coils in the control circuit are disconnected by the internal converter. The coil can operate normally with a rated voltage of 80%~110%, and too low voltage may cause the coil to heat up or even . Colour: White Material: Plastic Size: 140x103mm Package Contents: 1 * Power transfer switch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.