Isolating motor control center bypass units and systems

Abstract

An apparatus includes a housing, a first disconnect switch in the housing and having a first terminal configured to be coupled to a first unit (e.g., a first VFD or RVSS) external to the housing and a second disconnect switch in the housing and having first terminal configured to be couple to a second unit (e.g., a second VFD or RVSS) external to the housing. The apparatus further includes a first contactor in the housing and having a first terminal coupled to a second terminal of the first disconnect switch and a second terminal configured to be coupled to a motor and a second contactor in the housing and having a first terminal coupled to a second terminal of the second disconnect switch and a second terminal configured to be coupled to the motor, the second contactor mechanically interlocked with the first contactor.

Dependencies are inferred from the claim text.