DSH 436 Verification of the rated residual making and breaking capacity IDm

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DSH 436

Verification of the rated residual making and breaking capacity IDm 0 l  |: T$ T; [# I

9.11.2.3

61008-1(ed.2)

% ^* W' M% y9 u" f: H  L0 GStandard:
# c# c( Z6 v( u/ F' rIEC 61008-1 (1996-12)
! y5 J2 Y  C$ uSub clause:
: M9 e# b) y% z6 ?# ~7 j9.11.2.3
Sheet No. 436
Subject:
- {; }& u1 s4 ^Verification of the rated residual
making and breaking capacity IDm
( F5 m9 Z: z% [1 v' k2 tKey words: Confirmed at 39th
CTL Meeting
; W% |# D3 r, V; [Question:
9.11.2.3 refers to the test conditions prescribed in 9.11.2.1 and states that the resistor R3 shall
- H) d) d& l# m0 x# x" B, l  u+ ~not be used.
9.11.2.1 require the test circuits according to figures 5 to 9 together with resistor R2 to be used.
5 \( j2 D. z: F  z# b8 l0 jAccording to these figures, the following inconsistency appears:
2 J# I) Y% a$ h# X& p+ _  {For a single pole switch (with two current paths) normally rated for 230 V, the rated residual
0 o2 f, u5 {7 d: P5 \% {making and breaking capacity has to be tested at 230 V.
For a two pole switch normally rated for 400 V, the rated residual making and breaking
capacity has to be tested at 400 V.
+ E' c  S# D! P; o* |For a three pole switch normally rated for 400 V, the rated residual making and breaking
2 h: r4 j- R  }/ C7 Ccapacity has to be tested at 400 V.
* [; [5 M  @+ p6 B& n5 fFor a three pole switch with four current paths and for a four pole switch normally rated for
: ?& f+ m* J; G* a# N- a400 V, the rated residual making and breaking capacity has to be tested at 230 V.
Due to the fact that the purpose of this test is not to cover the special fault conditions in IT-systems,
5 ]5 Z) z( V9 A2 ]the test voltage for this verification of the rated residual making and breaking capacity should be
4 {$ o. q4 o, s230 V, independent of the number of poles, and the relevant figures should be corrected.
/ k( P5 ~" O* P3 rDecision taken at the SC23E WG2 meeting in Nice, October 2001:
Extract from the minutes IEC SC23E_WG2_006:
5 s0 h2 r" \3 t1 oSC23E_WG2_010 request from Austria to update 61008 clause 9.11.2.3
The proposal made by Mr Bachl was considered justified and accepted. During the meeting
WG2 decided that laboratories and certification bodies should be informed about this
5 A% g, R6 K; `3 b9 T  rimportant decision.
Therefore the following statement was drafted:
2
* \6 x, K/ Q" YDecision to be forwarded to CTL:
, m. K. P4 Z. N/ w- _  V& NIEC SC23E WG2 decided to correct the inconsistent test requirement in IEC 61008-1 (1996-12), subclause
. j/ j. q6 l; R6 f! i, t9.11.2.3 and in IEC 61009-1 (1996-12), subclause 9.12.13 - Verification of the rated residual
making and breaking capacity IDm.
The test voltage for this verification of the rated residual making and breaking capacity should be the
$ J+ ~4 T' Q5 Y2 s+ n! {* {: oline to neutral voltage, independent of the number of poles of the RCCB or RCBO. This correction will
be included in the next amendment or revision of IEC 61008-1 and IEC 61009-1.
The revised test circuit (fig. 7) proposed for the standard is attached.

, N/ `" X- k, w8 F