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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?; K( D% q Y a2 O# M
2.在接下来的5.1.5中标准中的两句话:
N8 }* s/ l" F( m3 a, K& s 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 main7 i) }! t" V+ d; Q5 J
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.
0 g5 j% p* I' T3 i) | @ The test is also conducted, on all equipment, with terminal A of the measuring network
# K! J [% \, Z* {% J. T: v! M' Y+ o5 Econnected via measurement switch "s" to each unearthed or non-conductive accessible part; s) I( J: T8 } V3 k C
and each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.% n& n( H, I Q! N
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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