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

9.11.2.3 & F2 e% O! J* h

61008-1(ed.2)

1 A2 ?+ h  a9 i* e0 m1 cStandard:
IEC 61008-1 (1996-12)
$ V" p# T) j* A/ \Sub clause:
9.11.2.3
1 C* E4 b' b1 q, o0 e4 ZSheet No. 436
Subject:
Verification of the rated residual
making and breaking capacity IDm
6 b7 X; u! ^# C( R7 _0 mKey words: Confirmed at 39th
( ]+ }. _: @- b* q6 J. I, D+ ~CTL Meeting
Question:
9.11.2.3 refers to the test conditions prescribed in 9.11.2.1 and states that the resistor R3 shall
$ D# x6 h' Q# d' v. Inot be used.
9.11.2.1 require the test circuits according to figures 5 to 9 together with resistor R2 to be used.
According to these figures, the following inconsistency appears:
5 n5 x: E3 F4 I0 R" F( }. fFor a single pole switch (with two current paths) normally rated for 230 V, the rated residual
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
6 K9 |/ I) v* d# B1 Gcapacity has to be tested at 400 V.
For a three pole switch normally rated for 400 V, the rated residual making and breaking
capacity has to be tested at 400 V.
3 C, a# R; B% U0 e' GFor a three pole switch with four current paths and for a four pole switch normally rated for
0 p4 F% [) S; }% B6 C& W: F400 V, the rated residual making and breaking capacity has to be tested at 230 V.
/ \0 \; m6 R8 l5 P+ aDue to the fact that the purpose of this test is not to cover the special fault conditions in IT-systems,
the test voltage for this verification of the rated residual making and breaking capacity should be
6 y1 n  T+ Q' h6 H0 R; v230 V, independent of the number of poles, and the relevant figures should be corrected.
, H, ~4 U5 S3 A# mDecision taken at the SC23E WG2 meeting in Nice, October 2001:
Extract from the minutes IEC SC23E_WG2_006:
" r6 O2 R5 l, G# X) NSC23E_WG2_010 request from Austria to update 61008 clause 9.11.2.3
4 \  n" h6 j5 jThe proposal made by Mr Bachl was considered justified and accepted. During the meeting
+ N! J$ I* o' b& ^WG2 decided that laboratories and certification bodies should be informed about this
important decision.
Therefore the following statement was drafted:
8 r. Q0 U) T8 @2
! _' M0 O$ e; Q( n) M% K) `Decision to be forwarded to CTL:
# r. C  x( {$ D; }! z( m+ m5 ZIEC SC23E WG2 decided to correct the inconsistent test requirement in IEC 61008-1 (1996-12), subclause
9.11.2.3 and in IEC 61009-1 (1996-12), subclause 9.12.13 - Verification of the rated residual
  h- E' N% A) a/ a! r& b$ Rmaking and breaking capacity IDm.
The test voltage for this verification of the rated residual making and breaking capacity should be the
. W; W; v! n2 @2 y) bline 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.


7 Q+ F, Y, P$ o# V& x; i( \