|
UL60950-1$ Q8 W" Z& C9 q% w" q0 H
5.1.5
2 c$ M+ F& m1 \* d" l3 F( N+ ], c, `/ B M
When testing three-phase equipment, any components used for EMC purposes and connected
2 [7 U2 _7 a* \, `& p- q" jbetween line and earth are disconnected one at a time; for this purpose, groups of components& g2 R" h" e" h4 k2 ]) d# U
in parallel connected through a single connection are treated as single components. Each time
! |" D. z7 S5 ?3 }* Y x `a line-to-earth component is disconnected the sequence of switch operations is repeated.
$ v0 G; T' B$ b6 f5 b$ s7 R
3 Y" o; H" c3 M% d- h& [2 n
$ j1 b8 g. B7 j! I6 |3 {8 y大家是怎么去断开电容的?/ ^7 _0 U/ m+ b' T6 j: F
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?
' N7 a3 J- r5 z" \自己的理解是断相线和地之间Y电容最少的一相。 |
|