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3.接地连续性测试,简单测了个电机的,其他连接的点嫌费事,就没测
" {) Z. k& e- @5 T接地连连续性要测试所有裸露表面,除非是肯定的可靠接地.6 k2 T1 x$ M9 w, s4 V
Location Current(A) Frequency(Hz) Measured voltage(V) Limit(V)
5 n: g" j4 G- i% O+ R. U/ k9 A# PBetween incoming
' D+ k. f0 {# P% H& g8 ]$ yPE terminal and
' g- o, M2 N( Q* t* F( h$ y9 rrelevant points . V* ?. [4 |8 E. ^, D# l1 H
that are part of
E4 i( u, e9 h' |. g) _. tthe protective
1 f s8 ~- W9 ~+ ybonding circuit 8 n$ e* L' } a3 u8 c$ c
PEФ>1.0 mm2 10A 50Hz --- <3.3V
& l& M5 [1 b7 R7 t6 u- lPEФ>1.5 mm2 10A 50Hz --- <2.6V* h3 j3 z$ L5 N y" m
PEФ>2.5 mm2 10A 50Hz --- <1.9V
$ q* {4 H' h0 ~, K; f7 C( fPEФ>4.0 mm2 10A 50Hz --- <1.4V% q9 e% ], s1 ~; G- k* {; _
PEФ>6.0 mm2 10A 50Hz --- <1.0V |
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