PDSH 1005 Measurement of tangent of loss angle on capacitors

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PDSH 1005 : k$ k" n% k! W9 B: f$ v ( N: T, A3 T: {* [

Measurement of tangent of loss angle on capacitors ' L- ]  b  p4 z; u. T

8

61049(ed.1) 2 @1 X! B5 V6 B! G1 Z* T$ ^

2 o, n7 \& z  ^; Y! Y+ ~9 [Standard(s):
& G0 \& W1 J: B1 AIEC 61049/1991
IEC 61049-Ec/1992
- X* l$ y, y$ [( W1 u7 y2 YSubclause(s): 8
' E; K- e( c" t4 C$ ENo. Year PDSH 1005 2010
Category: LITE Developed by: ETF5 OSM/LUM
Subject:
; t+ x7 V9 Z/ |  J" L7 V- w: o& x+ N* XMeasurement of tangent of loss angle on capacitors
2 j5 J! O3 |$ A, Z# Y  P; P% qKey words:
! U' f3 i/ i  t2 ~9 W: U; o/ p4 X- Discharge resistor
: {) v* w5 b) O2 c2 C1 g- Capacitor
- Tangent of loss angle
7 h! g* R% |% Y5 iTo be approved at the 49th CTL Plenary Meeting, in 2012
6 j, u% y3 F* x7 k$ n2 FQuestion:
When checking the value of the tangent of loss angle against the value declared by the manufacturer,
should a discharge resistor encapsulated with the capacitor be considered? This is relevant because in a 2
μF capacitor with a discharge resistor of 1 M
, the tangent can duplicate its value.
+ H2 p* M- G1 v: A$ zDecision:
In case the resistor is an integral part of the capacitor, the resistance is to be considered.
9 G: |0 G3 L1 K3 R+ f4 H
7 u' M( z& ^; U. {
$ R8 ]/ j0 ?' x) q# V" f8 S& O