To provide a switchgear equipped with interlocks improving safety and reliability.
On a front face panel 2, a single line connection diagram 4, an indicator 5 showing state of ON, OFF and disconnection, an indicator 6 showing a state of an grounding switch, a selection mechanism 7 for selecting manipulation of circuit break, disconnection and grounding, push button switches 8, 9 for closing and opening a circuit breaker, a manipulation handle insertion hole 20 for disconnecting and a manipulation handle insertion hole 30 for grounding are provided. Depending on positions of a manipulation pin 12 of the selection mechanism 7, a machine and apparatus to be manipulated is selected. Further, other than the selection of the manipulation, the selection mechanism 7 mechanically engages with shutters respectively provided at the manipulation handle insertion hole 20 for disconnecting and the manipulation handle insertion hole 30 for grounding, and achieves mechanical interlocks in series of manipulations between circuit break, disconnection and grounding. According to this switchgear 1, an erroneous operation can be prevented, various interlocks required for the switchgear is mechanically achieved, and safety and reliability are improved.
KOBAYASHI MASAHITO
SOTOZAKI HIRONORI
YAMAZAKI MISHUKU
| JP2006031943A | 2006-02-02 | |||
| JPH10188745A | 1998-07-21 | |||
| JPH09154208A | 1997-06-10 | |||
| JP2002374605A | 2002-12-26 |
Yuji Toda
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