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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?
( x. ?4 {" [' Q9 G4 Q3 o# g+ P2.在接下来的5.1.5中标准中的两句话:
Q4 D, W+ Y7 r( U 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 main6 t( D0 y/ [) j4 P
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.
% |" p; Q, j- c0 v The test is also conducted, on all equipment, with terminal A of the measuring network% m' r( A' Y8 M) w* [
connected via measurement switch "s" to each unearthed or non-conductive accessible part8 J* ?7 T$ G) {" X* n& w
and each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.
i# a$ T$ k' z' Q: s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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