A kind of switching electrical products for two or more power supply or load conversion. The transfer switch is composed of a combination of multi-section contacts. In electrical equipment, it is mostly used to turn on and off circuits infrequently, turn on power and load, measure three-phase voltage, and control the forward and reverse rotation and star of small-capacity asynchronous motors. Triangle start and so on. These parts are fastened as a whole by bolts.
The change-over switch is also called the combination switch, which is different from the operation of the knife switch. It is a plane operation that rotates left and right. The transfer switch has the advantages of multi-contact, multi-position, small size, reliable performance, convenient operation, flexible installation, etc. It is mostly used as a switch for the power supply in the electrical control circuit of machine tools. Control switch for infrequent starting and stopping of the motor. The transfer switch also has single pole, double pole and three pole.
The transfer switch can be used as a circuit control switch, a test equipment switch, a motor control switch, a master control switch, and a transfer switch for electric welding machines. The transfer switch is generally used to switch electrical control circuits and electrical measuring instruments in circuits with AC 50HZ, voltage to 380V and below, and DC voltage of 220V and below. For example, the commonly used LW5/YH2/2 type transfer switch is often used for conversion and measurement of three-phase voltage.
The combination switch is suitable for AC 50HZ, voltage to 380V and below, and DC voltage of 220V and below. It is used for manual infrequent switching on or breaking of circuits, changing power sources or loads, and can carry a large current.