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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?
3 ~$ K9 z2 ~) t' z: T2.在接下来的5.1.5中标准中的两句话:; V& g% K( N0 A7 m& r; I
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 main9 ?+ R0 \8 q7 C p8 L1 X* l. e
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.3 a' C7 h( @, \
The test is also conducted, on all equipment, with terminal A of the measuring network
! Q( U& F! ], k& L6 hconnected via measurement switch "s" to each unearthed or non-conductive accessible part
3 j9 @: D5 P1 D" q1 Iand each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.$ E+ d. W+ n5 y3 X6 T* u2 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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