Interlock for switchgear

Details Interlock for switchgear Interlock for switchgear

1999-02-18

2000-05-23

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Drawout-type switchgear

200 5022, 361609, H01H 920, H02B 500, H02B 1100

Patent

active

060668148

ABSTRACT:
Electrical switchgear for receiving either a vacuum circuit breaker or a dummy element and including a levering-in assembly with a positional interlock bar that is operated by a levering-in block in the levering-in assembly and by a finger on the dummy element. Access to the levering-in device is blocked when the source breaker is in the connect position. A key to unlock the access is obtained by levering the source breaker or a dummy out to the test position and locking it in that position or by levering a dummy element to a connect position and locking it in that position.

REFERENCES:
patent: 3921109 (1975-11-01), Hodgson
patent: 5164883 (1992-11-01), Little et al.
patent: 5200585 (1993-04-01), Davies et al.
patent: 5434369 (1995-07-01), Tempco et al.
patent: 5477017 (1995-12-01), Swindler et al.
patent: 5581133 (1996-12-01), Smith
patent: 5661627 (1997-08-01), Liebetruth et al.
Cutler-Hammer Literature, "Westinghouse 5/15 kV Medium Voltage Switchgear Copmonents", May 1996.

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