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5.1.6 Test measurements! a" y/ t2 D5 X7 _% {2 Z ?- l
Either the r.m.s. value of the voltage, U2, is measured using the measuring instrument of
* h ~4 @+ V( r) t+ MFigure D.1, or the r.m.s. value of the current is measured using the measuring instrument of
4 Q8 a2 e- R7 ^5 K2 ^4 sFigure D.2.( Y2 w) h" b. U7 `4 X
The D.1 instrument gives a more accurate measurement than the D.2 instrument if the
& F. s/ j: y. P3 }+ u5 g2 o- Y7 uwaveform is non-sinusoidal and the fundamental frequency exceeds 100 Hz.
7 v% H- ]* q R5 d7 K7 LAlternatively, the peak value of the voltage, U2, is measured using the measuring instrument
8 |9 H! E) J- p, ldescribed in Clause D.1.9 K' r& G) A( `7 O# {! ~
If the voltage, U2, is measured using the measuring instrument described in Clause D.1, the. j/ ~! |" e9 z0 E
following calculation is used:! t& o8 U2 U" R/ b; @
TOUCH CURRENT (A) = U2 / 500
6 w0 T4 M' _7 r0 ?NOTE Although r.m.s. values of TOUCH CURRENT have traditionally been measured, peak values provide better+ g4 o5 n% I; e: y2 ~
correlation with the response of the human body to non-sinusoidal current waveforms.* z9 B, L8 r: t# r; D
None of the values measured in accordance with 5.1.6 shall exceed the relevant limits in' B+ h- [# x: N6 h
Table 5A, except as permitted in 2.4 (see also 1.5.6 and 1.5.7) and 5.1.7.
7 d* w6 x: c5 X! H: U( u% o+ H! A这个是EN60950的标准,里面有说如果是D1是用peak值。 |
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