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UL60950-18 `! V" ]3 P* q h# x) V5 m
5.1.5
4 `! d8 T" Z4 I: O! l& U5 s8 A
0 R. z X+ P! c0 CWhen testing three-phase equipment, any components used for EMC purposes and connected
, T9 n4 i4 z7 m/ A' Cbetween line and earth are disconnected one at a time; for this purpose, groups of components
0 w5 \0 D5 g6 Y) U& x; Jin parallel connected through a single connection are treated as single components. Each time6 ]2 ^+ k0 |3 Y9 ]! J5 b
a line-to-earth component is disconnected the sequence of switch operations is repeated.
# y3 p+ B: ]6 Z0 \' T3 ~' k* r O% A; l' l. ], G( x; Y
) c0 B$ U! Q5 B大家是怎么去断开电容的？
, g |0 E* I3 l) N1 x( q8 p4 e通常一般人的习惯操作是直接缺相来实现，当三相平衡时，断任何一相都一样，当不平衡是怎么处理，该段哪一相？. a4 @& e O: U+ r, L# G+ a0 {( x; U
自己的理解是断相线和地之间Y电容最少的一相。 |
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发表于 2011-10-31 20:38
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