Mcgraw-Edison Company

Kazuo H Date

Ronald A Wainio

A manual operator for a series-connected circuit interrupter and disconnect combination mounted within a switch gearing closure, which includes an external operating handle affixed to a common operating shaft for the interrupter and the disconnect, which is rotatable about its axis between a closed position and an open position. A quick make, quick break, interrupter operating mechanism includes a manual operating shaft which is rotatable about its axis between a closed position and an open position. An operating rod has one end pivotally connected to a lever affixed to the common shaft and an opposite end pivotally connected to a lever affixed to the interrupter operator shaft, so that when the common shaft is rotated between its closed and open positions, the interrupter operating shaft is correspondingly rotated between its closed and open positions. The operating rod is held in a toggled position at both its closed and open positions by a spring connected between the rod and the switchgear enclosure. A disconnect operating shaft which is rotatable about its axis between a closed position and an open position, is connected by a 'lost motion' linkage to be operated by the interrupter operating shaft, wherein, when the interrupter operating shaft is rotated from its open position, the disconnect shaft is rotated from its open position only after the interrupter has opened, and when the interrupter operating shaft is rotated from its closed position, the disconnect will close before the interrupter closes.

Operator for a circuit interrupter and disconnect switch combination

A compact combination vacuum interrupter and visible break disconnect switch, in which the interrupter is electrically connected in series with the disconnect. The interrupter is manually closed, and can be tripped manually or automatically on overcurrent or undervoltage line conditions by a quick make, quick break, trip-free operating mechanism. The disconnect is manually opened or closed by a separate operating mechanism, which is mechanically interlocked with the interrupter operating mechanism so that the disconnect cannot be opened when the interrupter is closed, or the interrupter cannot be closed when the disconnect is open. The disconnect can be padlocked in its open position. The interrupter is mounted integral with the movable contact of the disconnect on a pivotable, insulating support member of the disconnect, with the movable contact rod of the interrupter pivotably connected to the interrupter operating mechanism. When the interrupter is in its open position, the pivotal axis of the interrupter movable contact rod coincides with the pivotal axis of the disconnect insulating support member, so that, when the disconnect is opened, the interrupter is pivoted about the same axis as the disconnect movable contact while the interrupter contacts are maintained at their fully open position.

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South Milwaukee, WI, United States of America

Kazuo H Date