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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 :
. L5 l. x* R7 j4 d2 X60065故障条件下是2S后120V,60950是怎么要求的呢?在哪个条款说的?
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根据60950标准2.2.3 Voltages under fault conditions: 0 M) R2 K8 G. {7 q& x4 u4 x
Except as permitted in 2.3.2.1 b), in the event of a single fault (see 1.4.14), the voltages between 7 T/ Q* u* A1 y( X
any two conductors of the SELV CIRCUIT or CIRCUITS and between any one such conductor and earth ' B! K0 x" N F
(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. $ o3 ~( z/ N9 I* ]6 ]
Moreover, the voltage shall not exceed 71 V peak or 120 V d.c., (V2 in Figure 2E).
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- [" ]7 U/ H* o# z6 F, ~ K就是说60950故障条件下0-200ms之内可是71V peak 或者120V dc。 6 D3 x. C/ }0 m$ ?! H+ B( q+ i
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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