求教大神UL60730-1中H.8.1.10.1以下蓝色highlight部分？

jansle_happy

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求教大神UL60730-1中H.8.1.10.1以下蓝色highlight部分？不是参照figure E.1测试么，测试网络的电阻不是RS:1500Ω； RB:500Ω; R1:10000Ω么，另外这里所说的time constant of the circuit 是指什么？
/ `+ x; `1 w6 {0 b

passagere

首先所示的电路图是根据该条款而设计的一条合适的测试电路。其实标准里并不是要求一定按照所示电路图去做测试电路，它只是一个例子。time constant of the circuit -- 电路的时间常数，请百度一下哈。

jansle_happy

; b0 |4 g3 l! e/ Q

passagere 发表于 2021-8-12 19:20
首先所示的电路图是根据该条款而设计的一条合适的测试电路。其实标准里并不是要求一定按照所示电路图去做测 ...

大神看起来，应该不是说figure E只是个列子吧，看起来原文是前面描述了测试电路的特性，然后给出具体的图书如图E啊。
6 @% Y- R' y# W+ c( M  g, vH.8.1.10 ACCESSIBLE PARTS shall not be considered as HAZARDOUS LIVE PARTS if separated from the supply by PROTECTIVE IMPEDANCE.
; j8 ~3 k( k; R$ PH.8.1.10.1 When PROTECTIVE IMPEDANCE is used, the current between the part or parts and either pole of the supply source shall not exceed 0,7 mA (peak value) a.c. or 2 mA d.c;
– for frequencies exceeding 1 kHz, the limit of 0,7 mA (peak value) is multiplied by the value of the frequency in kHz but shall not exceed 70 mA (peak value);
– for voltages over 42,4 V (peak value) and up to and including 450 V (peak value), the capacitance shall
  A6 n7 Z& X) M% l* u- Cnot exceed 0,1 μF;
  N1 A0 T$ A& u& G$ k. L) }– for voltages over 450 V (peak value) and up to and including 15 kV (peak value), the product of the capacitance in farads times the potential in volts shall not exceed 45 μC;
– for voltages over 15 kV (peak value), the product of the capacitance in farads times the square of the potential in volts shall not exceed 350 mJ.
* c) D/ c( ~; ^$ GCompliance is checked by measurement.
8 D- w" O8 ]- G! O! RVoltages and currents are measured between a single ACCESSIBLE PART (or any combination of such parts)
and the protective earth conductor. Measurements shall be taken in normal supply configuration, and with
$ Z7 a$ T' N- L; E5 X+ Nsupply poles interchanged.
The measuring circuit shall have a total impedance of (1 750 ± 250) W and be shunted by a capacitor such
that the time constant of the circuit is (225 ± 15) μs.
& Z1 X, E' f  @, P  w/ KDetails of a suitable measuring circuit are shown in Figure E.1.
0 H7 R( [: D) z+ m, O' m4 KThe measuring circuit shall have an accuracy of within 5 % for all frequencies in the range of 20 Hz to 5
) z$ M+ L' S" I* s- t: G" jkHz. For frequencies above 5 kHz, alternative methods of measurement are required.

passagere

% [  w, h: T: _) q, X/ f0 ^% M& G- ^
与之相关度高的字句如下：
# A, y' Q9 `; N8 ^( a/ E9 ]
6 P% Y% u; R: G8 r( G8 x/ \
Details of a suitable measuring circuit are shown in Figure E.1此处显示"suitable"则表明此电路是**之一的意思，下句也类似：
. T- z( F7 A( X/ A( UA suitable circuit (见插图上方文字描述的起始处)。
) I1 ]/ X$ W5 \. M# z
, H% }' j0 h0 c4 @标明了阻抗范围，还并联电容。说实话，电路是有等效性的，不同的电路
! E1 q7 R; L) u也一样可以做出这样的效果，于是，它列出了对测试电路的要求，并
0 S0 `# M8 Z. Y; L给出了电路例子。
8 ]' ?2 Y, e0 n. Q
这是我的理解，不尽然正确。
* q( K1 I" J' R' e7 j8 m

jansle_happy

passagere 发表于 2021-8-13 10:12
与之相关度高的字句如下：

; F! ]1 m5 s! M% K6 ~感谢大神分享

passagere

jansle_happy 发表于 2021-8-16 10:34
感谢大神分享

你的帖子比我多多了，安规方面我也有缺点的，不是大神