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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 :
" S2 Z8 w& G, m+ B1 _! w W# k60065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:
" O# q1 L2 P5 O- Y/ ^& YExcept as permitted in 2.3.2.1 b), in the event of a single fault (see 1.4.14), the voltages between
9 i S# C3 b2 a( h: L% Cany two conductors of the SELV CIRCUIT or CIRCUITS and between any one such conductor and earth + {, i C7 \" q2 B6 v& r5 f+ ]* D
(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.
+ ~- s; L$ ]0 P) a2 g: ~) r! t9 LMoreover, the voltage shall not exceed 71 V peak or 120 V d.c., (V2 in Figure 2E). ( I2 L& P8 g9 f( E) g- C0 ]
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就是说60950故障条件下0-200ms之内可是71V peak 或者120V dc。 : x7 ^. [0 s- Y: i& n2 ^: 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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