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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?
( j8 \8 ?- m4 b- }2.在接下来的5.1.5中标准中的两句话:& _% V: @ u/ h- ^- q5 L6 c
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
a; {" g/ j& Z! j3 U+ r R( M. [4 ]5 Oprotective earthing terminal of the EUT, with the earthing conductor switch "e" open.2 ?- t1 i* J+ S, y% k7 s# `; A
The test is also conducted, on all equipment, with terminal A of the measuring network
7 H( Y3 z! _% P* W2 u3 gconnected via measurement switch "s" to each unearthed or non-conductive accessible part9 ^4 l! F, f8 A' f7 J4 N
and each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed., ]8 |0 @. h; H0 z* X& M
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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