Manual Change Over Switch is a switch with two or more positions that can be operated manually to change the connection status of a circuit. It is commonly used in applications where different circuit paths need to be selected, such as backup power switching, equipment start and stop control, etc.
ITEM |
SFT2-63 |
Rated Working Current |
16,20,25,32,40,63A |
Pole |
1P,2P,3P,4P |
Rated Working Voltage |
230/ 400V |
Controling Voltage |
AC230V/380V |
Rated Insulation Voltage |
AC690V |
Transfer Time |
≤2S |
Frequency |
50/60Hz |
Operating Model |
Manual ( I-O-II) |
ATS Level |
CE |
Mechanical Life |
10000 times |
Electrical Life |
5000 times |
Principle of operation
The working principle of a manual reversing switch is relatively simple. It contains one or more sets of contacts that are connected to different circuits in different positions. When the handle or knob is operated, the contacts move with it, thus changing the state of the circuit connection.
Manual reversing switches are available in a variety of types and configurations, the following are common:
Single-pole, single-throw (SPST) switches: have only one contact to connect or disconnect a circuit.
Single-pole, double-throw (SPDT) switches: have one common contact and two optional contacts that can be manually switched to two different circuits.
Double-pole, double-throw (DPDT) switches: have two independent single-pole, double-throw switches that can switch two circuits simultaneously.
In addition, manual reversing switches can be categorized according to parameters such as installation method, rated current and rated voltage.
Manual reversing switches are widely used in a variety of situations where manual circuit switching is required, such as:
Standby power switching: In power systems, when the main power supply fails, the manual reversing switch can be used to switch to the standby power supply to ensure the continuous operation of the equipment.
Equipment start and stop control: In industrial automation control systems, manual reversing switches are commonly used for equipment start and stop control.
Circuit testing and debugging: During circuit testing and debugging, manual reversing switches can be used to select different circuit paths for testing and analysis.