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|  PDSH 1005* z# q- Z. E) A" ]) E3 H) J
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| Measurement of tangent of loss angle on capacitors8 B7 F% ~4 k j9 \" O: `) i1 o
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# h/ ]( W' q; h1 A) ] ^2 e4 J | 61049(ed.1)2 p Z! g. Z' s9 [
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Standard(s):. A! n) ]7 h8 b* X y& `
IEC 61049/19914 m$ R: X5 p! d- ~& K
IEC 61049-Ec/19926 Q5 E u3 f; n" h
Subclause(s): 8+ ?; W' \1 S ^
No. Year PDSH 1005 2010& m, d% `" Q" o9 h2 k' T0 F2 s
Category: LITE Developed by: ETF5 OSM/LUM
! w0 L% |; X9 S/ z! k! x! m: O# [Subject:! E. k! S4 \+ v# Z: P% v/ N
Measurement of tangent of loss angle on capacitors
( c r% Z4 o- Y3 v) Z2 J$ TKey words:
# w- _7 [7 T* ]! e! {+ [- Discharge resistor
1 L8 x3 e8 w0 Z- J$ N- Capacitor/ {" m2 J# A" q9 D6 h: ?% E
- Tangent of loss angle8 w+ y! O( j* H5 ?5 g
To be approved at the 49th CTL Plenary Meeting, in 20122 b/ j, S' n& w1 C
Question:4 @& f- ?8 k. [3 n+ @
When checking the value of the tangent of loss angle against the value declared by the manufacturer,
% S* C Z& Q. a/ J/ ~should a discharge resistor encapsulated with the capacitor be considered? This is relevant because in a 2, r: {; E# L1 d' ~9 f1 ` ]
μF capacitor with a discharge resistor of 1 M, the tangent can duplicate its value.
1 ~0 {, u( }) V, x' h6 kDecision:. |5 ?/ G/ {3 E' ]$ g/ {
In case the resistor is an integral part of the capacitor, the resistance is to be considered.0 i: j" `( W9 g" d
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发表于 2012-9-17 16:03
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