Heavy-Duty, Dependable Power Interruption
Many of our switches allow the option of adding an Auxiliary Switch for both the vacuum interruptor mechanism and the operating shaft.
Undervoltage & Shunt Trip Devices
These devices provide selective tripping from various control functions.
Many of our switches may be provided with an attached Fuseholder for up to 400A. They accept fuses with a built-in spring operated striker pin. This pin extends out one end of the fuse when blown and causes a mechanical linkage to open or close an auxiliary switch. The switch can then provide a signal to the shunt trip or undervoltage tripping attachment. Single phasing from one or more blown fuses can’t persist. Available through 15KV applications.
Retrofit of new applications may require a separate fuseholder, which includes an auxiliary switch option for remote or local annunciation. Available through 15KV applications
Non Load Break, Visible Disconnect Switches
SMC Visible Disconnect switches are available rated through 15 KV in non-load break applications. An auxiliary switch is provided on the switch handle that operates prior to switch blade operation to permit interruption by other devices.