|
|
接地阻抗测试Resistance of Grounding Test电流已经更改从25A到30A，是第六版次，其它都没变，电压设置为12V，电阻不能超过0.1ohm.; _! e6 `8 L! {( M0 N
对比过10A,30A,35A，感觉不到电阻变化很大。' V; x+ e$ i O+ f" O
UL1082
+ C8 a' T3 @; i% G1 t- y29 Resistance of Grounding Test4 }3 v. f. t- U) `& h. F
29.1 The resistance between the point of connection of the equipment-grounding means at or within the
- M v9 p, ~$ x. S& E0 `+ v7 Qappliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
+ W2 E/ \3 U% o29.2 Compliance with the requirement in 29.1 is to be determined by:+ d2 \$ Y4 E1 c {) E( U' D, h8 Q5 Z. S' A
a) A resistance-measuring instrument; or
/ U, s h: {# M( Zb) Passing an alternating current of at least 30 amperes from a power supply of not more than
# X1 E, G% f' }1 B" y, n& N# @8 @12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,
! g3 z( h! }$ @; z3 i8 Xand then measuring the resulting drop in potential between the two points. The resistance in! V0 O$ v5 B3 T% [& A( Q
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
2 n, Q a! ?, s: \( K" q! Ipassing between the two points. |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
发表于 2009-12-23 16:06
显身卡