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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 :
% l, L4 K/ U6 ]% O+ E60065故障条件下是2S后120V,60950是怎么要求的呢?在哪个条款说的? * k! b, I0 e+ y5 e2 I' r
9 u2 v+ f. K4 C9 Q- @3 S4 @根据60950标准2.2.3 Voltages under fault conditions:
4 b- u$ Y& {! G& JExcept as permitted in 2.3.2.1 b), in the event of a single fault (see 1.4.14), the voltages between
* c6 I- d: f* K8 Jany two conductors of the SELV CIRCUIT or CIRCUITS and between any one such conductor and earth ' U$ P) X& C! f/ q1 o, w
(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. 4 i, ]9 r1 n* b' D
Moreover, the voltage shall not exceed 71 V peak or 120 V d.c., (V2 in Figure 2E). : V/ i1 o5 R. B% s t
8 k! }# \' r) B1 h9 L" ^. O
8 p( y# y5 `3 I! o6 K
就是说60950故障条件下0-200ms之内可是71V peak 或者120V dc。 7 G4 k J, k* b5 J. e% c
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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