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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?
$ z8 q8 j" }1 i$ E& t! {2.在接下来的5.1.5中标准中的两句话:
7 Q" Z- d$ C$ v2 o) f 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( |0 r9 f; C/ m/ `/ b. g
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.9 @1 j$ h. n, u* K" z/ q
The test is also conducted, on all equipment, with terminal A of the measuring network) u0 d$ `) G+ C0 R5 s7 A+ h# N
connected via measurement switch "s" to each unearthed or non-conductive accessible part
+ v' `7 y$ |* f- Kand each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.) ]9 |5 Z6 a% A/ D8 g, h
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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