Application

The By-pass switches are designed to meet customer specific needs particularly in IT related industries where UPS and Servo stabilizers provide main source of supply. In the event of an emergency, normal supply can be made available to the services without interrupting any installation and at the same time providing time for maintenance of UPS systems without causing break down of services.

Operation

The By-pass Switch is operated manually with handle. It provides 3 stable positions namely :

0       Loads are open circuited

I       Loads are connected to stabilized supply

II       Loads are connected to the normal supply

Single Line Diagram

At '0' position, all the contacts of the three disconnectors are open and thereby provide isolation. At 'I' position, disconnectors No.I and III are closed and disconnector II is open. Hence stablized supply is connected to the load. At 'II' position only disconnector No.II is closed and I & III are open. Hence bypassing the UPS and connecting the load directly to normal supply.

Auxilliary contact

Auxilliary contacts having I NO.NC or 2 NO.NC configuration can ben provided for indication and signaling purposes.