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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?7 ^6 q, s) r# w; Y
2.在接下来的5.1.5中标准中的两句话:
% V1 D( w' b0 q% X# h 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+ @2 ?! M+ f) j7 T+ c
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.# y o* O9 o% J5 P l
The test is also conducted, on all equipment, with terminal A of the measuring network3 i, l+ S2 E0 _+ p0 w# e6 G
connected via measurement switch "s" to each unearthed or non-conductive accessible part
0 x* M: |, Y" W) {and each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.; k Q! ]0 ~; U1 N9 w: p- e
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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