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发表于 2009-10-14 22:33
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来自: 中国浙江舟山
3.7.4(d) Locking facilities. Withdrawable circuit breakers and switches are to be provided
with mechanical locking facilities in both service and disconnected positions. For maintenance
purposes, key locking of withdrawable circuit breakers, switches and fixed disconnectors are
to be possible. Withdrawable circuit breakers, when in the service position, are to have no
relative motion between fixed and moving parts. |
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