Patent ID: 9726726
Date: 2017-08-08
CPC Classifications: G01K,G01R,H01H,H02P,H05K

Claim:
1. A three-phase electromechanical switching device, comprising: three single-phase switching devices mechanically and electrically coupled in parallel with one another, each single-phase switching device comprising a direct current electromagnetic operator that in operation receives a direct current control signal for switching of the device, stationary contacts disposed in a respective device housing, and a movable assembly that in operation is displaced by energizing the operator and that comprises movable contacts that open and close, with the stationary contacts, a single current carrying path through the respective single-phase switching device; wherein each of the single-phase switching devices is configured to receive control signals from control circuitry coupled to the operators of the respective single-phase switching devices to cause at least one of the single-phase switching devices to open or close the single current carrying path at a desired time coordinated with a current zero-crossing or a predicted current zero-crossing of a phase of three-phase power wherein each single-phase switching device comprises a direct current electromagnetic operator that in operation receives a direct current control signal for switching of the device, stationary contacts disposed in a device housing, and a movable assembly that in operation is displaced by energizing the operator, and that comprises movable contacts that, with the stationary contacts, open and close a single current carrying path through the respective single-phase switching device, wherein a gap is provided between a core of the operator and an armature of the movable assembly when the movable assembly is displaced to a closed position; wherein each single-phase switching device comprises a plurality of splitter plates disposed adjacent to the movable contacts and configured to: