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5.1.6 Test measurements
6 @ E9 Y1 Z; w5 P' g! x0 c& JEither the r.m.s. value of the voltage, U2, is measured using the measuring instrument of, ?% q; G9 e# U/ ?( _; A
Figure D.1, or the r.m.s. value of the current is measured using the measuring instrument of
4 Z+ I3 j/ k7 ]- WFigure D.2.
6 B$ ]* T2 ?$ U1 y, FThe D.1 instrument gives a more accurate measurement than the D.2 instrument if the) V+ A6 A# {. C# K3 X5 ^+ F- I
waveform is non-sinusoidal and the fundamental frequency exceeds 100 Hz.
! ^" D. }; l9 q Z& DAlternatively, the peak value of the voltage, U2, is measured using the measuring instrument
% \/ M; q: U, [: S Zdescribed in Clause D.1.+ i6 ]- Z' o3 j2 I
If the voltage, U2, is measured using the measuring instrument described in Clause D.1, the
/ _- \5 N5 E( D. lfollowing calculation is used:! Y/ O% g$ n; E2 @! P
TOUCH CURRENT (A) = U2 / 500
- y Y2 s8 K" W( T6 Y, n' [1 bNOTE Although r.m.s. values of TOUCH CURRENT have traditionally been measured, peak values provide better q3 z. w* s, o* R2 f/ d2 ^1 B: F8 Z
correlation with the response of the human body to non-sinusoidal current waveforms.
9 j8 a# o* }' tNone of the values measured in accordance with 5.1.6 shall exceed the relevant limits in
3 h" Z& L5 {' X2 ^* y# tTable 5A, except as permitted in 2.4 (see also 1.5.6 and 1.5.7) and 5.1.7.
. f5 x9 W' L& W6 z: \( w这个是EN60950的标准，里面有说如果是D1是用peak值。 |
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