kelvinwen 发表于 2010-11-10 14:50

引用第8楼milighost于2010-11-10 12:21发表的:
1次on或者1次off算一个operation,on/off一次叫做一个cycle
你可以仔细看开关标准
赞同此观点。标准中讲开关寿命是指CYCLE循环(开和关一次叫一个循环)。

zhutongshuai 发表于 2010-11-10 15:00

OPERATION: Transfer of moving contact(s) from one position to an adjacent position.
操作operation
动触头从一个位置转换到相邻位置。(IEV 441-16-01)

OPERATING CYCLE: Succession of OPERATIONS from one position to another and back to the firstposition through all other positions, if any.
操作循环operation cycle
相继从一个位置到另一个位置,再经过所有其他位置(如有)返回到初始位置的连续操作。(IEV441-16-02)

brent 发表于 2010-11-10 16:26

正解, 謝謝!

flyindog 发表于 2010-11-11 14:27

今天看UL标准有一句话:
A controller employing a disconnect switch or mechanism, used to interrupt the magnetizing current
of the control transformer, shall be subjected to 25 close-open operations of the disconnect device with
the transformer connected in the intended manner.

应该说operation 仅指其中一个过程(open or close) 所以标准才会说close-open operations.
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