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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?
0 X# g- a( @. O* k8 k/ w2.在接下来的5.1.5中标准中的两句话:
: M9 x# w$ Q. t4 ~ 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! W4 J( ~) S" q) @
protective earthing terminal of the EUT, with the earthing conductor switch "e" open.
; P- ?- N0 Y, g* a% E. k The test is also conducted, on all equipment, with terminal A of the measuring network
3 k/ ?5 n' \9 u3 E& mconnected via measurement switch "s" to each unearthed or non-conductive accessible part
. q4 ?! H/ v$ k* S6 Band each unearthed accessible circuit, in turn, with the earthing conductor switch "e" closed.
6 Z; q$ v1 g) N5 x& v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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