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5.1.6 Test measurements
" g4 w! d/ ^) K5 o2 f' VEither the r.m.s. value of the voltage, U2, is measured using the measuring instrument of
$ P; v* M. b8 A/ w7 p: s3 `" zFigure D.1, or the r.m.s. value of the current is measured using the measuring instrument of
- F' ~4 c. u8 ], W( ~$ q& lFigure D.2.2 c# U7 o# \* U7 B
The D.1 instrument gives a more accurate measurement than the D.2 instrument if the
$ G1 o/ P. P" b; V# Rwaveform is non-sinusoidal and the fundamental frequency exceeds 100 Hz.+ E8 \0 ]& G! P( X
Alternatively, the peak value of the voltage, U2, is measured using the measuring instrument2 r7 r, ~% w& E4 w' v& H6 F6 _
described in Clause D.1.
2 r) S) z8 g* G: W7 EIf the voltage, U2, is measured using the measuring instrument described in Clause D.1, the# ]* D) u* W) f% Y2 R
following calculation is used:
% w$ n1 ^4 r6 Q- k( `TOUCH CURRENT (A) = U2 / 500
3 j. p3 P# g2 N" q& A6 r# f" |NOTE Although r.m.s. values of TOUCH CURRENT have traditionally been measured, peak values provide better1 \9 f; t. ^/ u. Q
correlation with the response of the human body to non-sinusoidal current waveforms.+ e, E" h) x/ z V# F/ }! G
None of the values measured in accordance with 5.1.6 shall exceed the relevant limits in
4 O* ?5 W" o+ v3 w9 e, ^( Y/ ]Table 5A, except as permitted in 2.4 (see also 1.5.6 and 1.5.7) and 5.1.7.) n: F1 t8 A1 x" n
这个是EN60950的标准,里面有说如果是D1是用peak值。 |
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