Electrical switchgear

Details Electrical switchgear Electrical switchgear

1983-04-01

1985-01-08

Pellinen, A. D.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

361344, H01H 922

Patent

active

044928319

ABSTRACT:
High voltage electrical switchgear comprises a chamber (1) in which is enclosed input contacts (8), output contacts (24) and earth contacts (16). A movable switch (12) may connect either the input to the output contacts or the output to the earth contacts. The output contacts are connected by a conductor (25) extending through the wall of the chamber to a connector unit located externally of the chamber. The connector unit (27) has a conductor (32) moulded in situ in a housing (28) having a socket (30) receiving a plug (26) cast integrally with the chamber and through which the conductor (25) extends. An output cable (34) is connected to the connector unit, which also provides contacts (37) for connection to a test unit. A cover (40) protects the connector unit and interlock means (58,43) act to allow opening of the cover only when the switch (12) connects the output contacts with the earth contacts.

REFERENCES:
patent: 2084893 (1937-06-01), Davies
patent: 2600304 (1952-06-01), Krida
patent: 3179762 (1965-04-01), Swinney

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