|
Fault Current Test - Three capacitors of each size and voltage rating are orientated in a vertical up, horizontal and vertical down position and tested under an induced fault condition at the desired available fault current level.
0 h* f3 Z' W3 k3 Q2 w" N q4 N" q+ [4 e6 t& L. ? s
Restrike - Conducted on expansion protected capacitors. One capacitor out of three (i.e., one capacitor from each of the samples tested at each current level for each Fault Current Test position) is chosen based on the least amount of swelling. The capacitor is connected in an AC circuit of a potential equal to the Fault Current Test and positioned in the same manner as in the Fault Current Test.
) e7 Q; M. Q$ @* U, C* B) Z0 n8 R/ m
Dielectric Withstand Test - For oil filled constructions each capacitor, after being subjected to the Fault Current Test, is to be subjected to an application of 60 Hz alternating potential at 1-1/2 times the maximum rated voltage between the terminals of opposite polarity and between the terminals of enclosure. For dry type constructions: each capacitor, after being subjected to the Fault Current Test is to be subjected to the application of 60 Hz alternating potential of 1000 V plus twice the rated voltage between live parts and dead-metal parts and 1-1/2 times the maximum rated voltage between terminals with opposite polarity.
* Z7 R6 p: `& J1 q' M+ R0 J+ B& T
q1 x8 i4 T) q- O, K( w& o, _ Lead Pull-Out Test - Six samples of the capacitors provided with leads shall be subjected to a 20 lb (89 N) Lead Pull Out Test for No. 18 AWG wire or larger and a 8 lb (36 N) lead pullout for leads smaller than No. 18 AWG.
' A: l" S8 R6 v+ `" u( ~8 t
' @( K! q) G% O2 }) e* y1 [$ Z! M% S Test Acceptance - In general, test acceptance is judged on the basis of the test results. The capacitor shall not exhibit a risk of shock or fire as demonstrated by venting or rupturing, dielectric failure, flaming of the cotton, or expulsion of conductive material and/or pulling out of leads. For further details, refer to the Standard for Capacitors, UL 810.
7 i3 ~3 F5 V2 f) ^请有做过电容UL认证的大虾帮忙以上测试是怎样操作的.中文如何翻译?谢谢. |
|