Thomson Power Systems TS 870 Manual Transfer Switch employs an enclosed contact power switching unit with an electrically operated control mechanism to allow manual selection of desired power source to feed a common load.
All manual load transfer sequences are “Open Transition” (i.e. “break-before-make”). All TS 870 Manual Transfer Switch models have been tested in accordance with UL 1008 standards. Molded case circuit breakers or fuses with overcurrent protection are required upstream of the transfer switch. The standard Manual Transfer Switch is rated for 100% system load. Operating status is provided via LED indicators visible on the front of the enclosure.