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5.1.6 Test measurements ]) c+ Q& e9 D$ P* `+ R2 c' [* ^
Either the r.m.s. value of the voltage, U2, is measured using the measuring instrument of1 E X' E2 t. [& c- ^5 z
Figure D.1, or the r.m.s. value of the current is measured using the measuring instrument of: g- X# Y8 w8 a0 g* @
Figure D.2.
. O: U8 ?5 R! i% ?' [& _9 x7 N! |The D.1 instrument gives a more accurate measurement than the D.2 instrument if the1 l& v( G7 ~" @9 h, X
waveform is non-sinusoidal and the fundamental frequency exceeds 100 Hz.
/ C3 G% F# d$ p2 V0 | A0 Y7 L3 F7 qAlternatively, the peak value of the voltage, U2, is measured using the measuring instrument
% Z) `4 X" ^+ X% X2 Rdescribed in Clause D.1./ G# E X; s( y2 L1 m4 k P( L9 u- A
If the voltage, U2, is measured using the measuring instrument described in Clause D.1, the
3 J; I3 s" c7 K* L1 Q) Ofollowing calculation is used:3 @) u- M) s+ N0 n
TOUCH CURRENT (A) = U2 / 500+ \ c1 u9 z7 h" P: e r
NOTE Although r.m.s. values of TOUCH CURRENT have traditionally been measured, peak values provide better
' f" Z& N6 e4 d/ Hcorrelation with the response of the human body to non-sinusoidal current waveforms.; B" a% x" O8 @3 G# d( q& O0 O3 W
None of the values measured in accordance with 5.1.6 shall exceed the relevant limits in+ `& V) D$ i, r( D; Y% q% S5 N
Table 5A, except as permitted in 2.4 (see also 1.5.6 and 1.5.7) and 5.1.7.2 d z8 e6 U7 j [- M! G5 m
这个是EN60950的标准,里面有说如果是D1是用peak值。 |
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