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引用第0楼黑土白云于2009-07-01 15:33发表的 故障条件下电源端的剩余电压判断 :
/ Q1 e8 e7 H0 \/ I" L60065故障条件下是2S后120V,60950是怎么要求的呢?在哪个条款说的? * Q, W, |$ X5 h7 T. E% C
5 e( F" Z9 M+ c2 k根据60950标准2.2.3 Voltages under fault conditions: 8 ^ C, q2 a- B" ?9 d6 p/ D
Except as permitted in 2.3.2.1 b), in the event of a single fault (see 1.4.14), the voltages between ( O$ V7 C9 G0 D7 C& E5 O: M0 m
any two conductors of the SELV CIRCUIT or CIRCUITS and between any one such conductor and earth
. i: B( u" _8 [6 g5 t9 k/ J# M(see 1.4.9) shall not exceed 42,4 V peak, or 60 V d.c. (V1 in Figure 2E) for longer than 200 ms.
: e$ l4 X8 n9 D8 Z) OMoreover, the voltage shall not exceed 71 V peak or 120 V d.c., (V2 in Figure 2E). - _: j2 z7 f0 z4 B
3 L$ X9 i# d7 @
( w+ \2 d* v: M7 [1 N8 x
就是说60950故障条件下0-200ms之内可是71V peak 或者120V dc。 & }2 `$ E6 R- ^2 [# u
200ms之后电压时间内的故障电压不能超过42,4 V peak, or 60 V d.c.。 |
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