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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?( D7 r7 |! m! t: L5 ^
2.在接下来的5.1.5中标准中的两句话:! c& X* D- k; L# L
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& ~# J1 ] V( a: M. j
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.
: Z; G7 w$ L6 l- e, R& S The test is also conducted, on all equipment, with terminal A of the measuring network: H$ w3 H4 Q2 v" T4 }
connected via measurement switch "s" to each unearthed or non-conductive accessible part
4 {- ?; ^8 T& _, ] c1 Aand each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.# |4 S2 r }# L/ h2 v& E+ U% o
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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