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5.1.6 Test measurements
2 f8 d6 v2 W3 K+ G" l' cEither the r.m.s. value of the voltage, U2, is measured using the measuring instrument of
1 N% |+ Y8 [) F2 l+ ]5 e1 D( h- `! BFigure D.1, or the r.m.s. value of the current is measured using the measuring instrument of: c3 N1 t3 Z& B1 D* C& I, ^" E
Figure D.2.) Y9 e, [6 `( C+ w* f* g! p5 g# [" f
The D.1 instrument gives a more accurate measurement than the D.2 instrument if the2 V, A0 f2 `9 ^9 C$ {% R
waveform is non-sinusoidal and the fundamental frequency exceeds 100 Hz.( }/ \. R2 T( f. ^+ [: _! O
Alternatively, the peak value of the voltage, U2, is measured using the measuring instrument9 `: O* V: }- D6 ?% h6 \. ~; `
described in Clause D.1.8 W! ~3 l; U6 D7 U* u( {
If the voltage, U2, is measured using the measuring instrument described in Clause D.1, the5 G& a1 P$ }% ~) H8 \3 j
following calculation is used:+ b3 r& s9 a! N; C. d
TOUCH CURRENT (A) = U2 / 500
2 l& g2 Q6 W3 w- ~NOTE Although r.m.s. values of TOUCH CURRENT have traditionally been measured, peak values provide better# P7 ]9 b" @) a4 Q3 ^
correlation with the response of the human body to non-sinusoidal current waveforms.
. k8 e9 u# O: ?2 Q- h; W0 H6 HNone of the values measured in accordance with 5.1.6 shall exceed the relevant limits in
( V* k6 `0 I8 N/ Z8 g# {Table 5A, except as permitted in 2.4 (see also 1.5.6 and 1.5.7) and 5.1.7. R, [1 f- Z% q. v
这个是EN60950的标准,里面有说如果是D1是用peak值。 |
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