Universal transfer switch is mainly divided into the following categories:
According to the use of classification: universal changeover switch is mainly used for a variety of control line conversion, voltmeter and ammeter phase change, measurement, control, power distribution equipment, remote control and high-voltage circuit breaker operating mechanism of the sliding and closing control, but also as a servomotor speed change and commutation control with 12. It can also be used as servo motor speed change and commutation control12.
Classified according to the operation mode:
Positioning type: the handle needs to be reset manually after moving it by hand.
Self-restoring type: after the handle is in a certain position, when the hand releases the handle, the handle automatically returns to the original position.
Positioning self-recovery type: combines the characteristics of positioning type and self-recovery type, i.e., the handle can stay in a certain position, but it can also be automatically reset23.
Classification by contact system:
Transfer switches for main command control: usually with 1 to 12 sections, 12 types in total.
Transfer switches for direct motor control: mainly 2, 3, 4 and 6 sections, 4 types in total23.
Categorized by handle type:
Knob: suitable for situations requiring frequent operation.
Ordinary handle: suitable for general operation.
Handle with positioning removable key: suitable for situations requiring precise control 34.
Classification according to the form of protection:
Open type: without specialized protective housing.
Protected: with specialized protective housing, suitable for harsh environments 34.
Common models:
LW2 Series: Including common type, key type, signal lamp type, etc.
LW5 series: applicable to DC, AC 50Hz, voltage 500V and below circuits, with 1 to 16-speed single-row transfer switches and 18-speed and above three-row transfer switches.
LW6 series: applicable to circuits with AC 50Hz, voltage 380V and below or DC 220V and below.
LW12-16 series: suitable for circuits with AC 50 (or 60) Hz, voltage up to 380V
