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1.如图所示,IEC60950 FIGURE 5中的测量网络,中间连接L,N,PE的黑线是什么意思?如果是导线,不久将L,N,PE连接起来了吗?这样测量又有何意义呢?
+ {: g5 |7 |; `2 j: x7 D2.在接下来的5.1.5中标准中的两句话:" z( j/ Z- L/ M8 q6 l ~+ g
For equipment having a protective earthing connection or a FUNCTIONAL EARTHING connection,terminal A of the measuring instrument is connected via measurement switch "s" to the main
1 d7 c$ t8 d. b7 ^, P: J! Sprotective earthing terminal of the EUT, with the earthing conductor switch "e" open.
7 t t; B/ t$ b. X8 c The test is also conducted, on all equipment, with terminal A of the measuring network7 h6 d$ u: E8 c4 X. B0 Q
connected via measurement switch "s" to each unearthed or non-conductive accessible part2 y0 {5 p% R e3 {& p# B
and each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.* _! E6 G- v9 M P0 @ q0 i5 |
是否说明测量分为两种情况,一种是接地测量,一种是不接地测量?? |
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