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 $ P6 b( \1 n, r4 X$ g. B4 L8 g9 q

9.11.2.3

61008-1(ed.2)

Standard:
& T+ o- f; L* _& L! iIEC 61008-1 (1996-12)
! t7 O# X! e; E% x8 J% g5 eSub clause:
4 m& U' z1 i1 K& |" S9.11.2.3
- u$ ^- T2 G: }( USheet No. 436
Subject:
Verification of the rated residual
- ]2 x( K. o# xmaking and breaking capacity IDm
Key words: Confirmed at 39th
1 D& v; j' d2 T. g2 v- dCTL Meeting
Question:
9 P! P  K; n1 J6 i# k  E! h/ F9.11.2.3 refers to the test conditions prescribed in 9.11.2.1 and states that the resistor R3 shall
- k+ w5 A7 m8 A; L. Znot be used.
& r; t4 d/ ?/ G9.11.2.1 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:
) \" R' ~. f' w& eFor a single pole switch (with two current paths) normally rated for 230 V, the rated residual
4 Y+ [/ f1 p9 b- c+ H: u& p$ k; y& C' Tmaking 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.
# ?( J9 {! j  E7 FFor a three pole switch normally rated for 400 V, the rated residual making and breaking
capacity has to be tested at 400 V.
For a three pole switch with four current paths and for a four pole switch normally rated for
, x4 S. J4 R! B' Y400 V, the rated residual making and breaking capacity has to be tested at 230 V.
2 E" l5 R. l. e' G8 d% W, L& YDue to the fact that the purpose of this test is not to cover the special fault conditions in IT-systems,
" `& _' J1 T/ ~% Q# Q" Tthe test voltage for this verification of the rated residual making and breaking capacity should be
* O7 z+ C2 C# a; u6 i; ~9 M230 V, independent of the number of poles, and the relevant figures should be corrected.
( Y+ |6 g. c) Y4 bDecision taken at the SC23E WG2 meeting in Nice, October 2001:
Extract from the minutes IEC SC23E_WG2_006:
: R4 m: ]5 {4 NSC23E_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
# u- z& t4 `6 e  E3 e" H7 n* D4 UWG2 decided that laboratories and certification bodies should be informed about this
8 A3 v" L# d: v: O2 W2 Jimportant decision.
Therefore the following statement was drafted:
% T! a4 l9 y1 f# j' x. q( c+ Q8 \2
+ Y( `0 }! w5 h2 c! a6 |Decision to be forwarded to CTL:
) K' Q- D1 `6 [IEC SC23E WG2 decided to correct the inconsistent test requirement in IEC 61008-1 (1996-12), subclause
7 G2 e0 `) t) c: Z9 P. [& N+ T9.11.2.3 and in IEC 61009-1 (1996-12), subclause 9.12.13 - Verification of the rated residual
& M! e: T% R& G$ ~making and breaking capacity IDm.
7 t% m1 T* ~0 |* t1 wThe test voltage for this verification of the rated residual making and breaking capacity should be the
% S7 {5 y5 G$ M; Iline to neutral voltage, independent of the number of poles of the RCCB or RCBO. This correction will
% e6 X% x8 K! ^: c! g, S2 l4 Ybe 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.