DSH 437 Verification of the rated residual making and breaking capacity ID m

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DSH 437 ! h, Z: `9 Q; E. k3 o2 J2 M

Verification of the rated residual making and breaking capacity ID m 7 |, z2 ?- \* C' Z) \2 ?4 L8 R6 f5 R

9.12.13

61009-1(ed.2) 2 ~6 t+ w. D( b/ k5 e

  n  ?1 Q" u, E2 {* n& tStandard:
$ a/ \9 s6 r4 F& j, r; mIEC 61009-1 (1996-12)
9 C5 r  v1 E$ F+ e; CSub clause:
3 ?* t( \$ @6 D/ j+ P/ ^/ c8 P9.12.13
Sheet No. 437
: b5 r6 L! Y/ {% q, OSubject
  W# A  \" W% [) WVerification of the rated residual
& a2 S; h+ e  [! r) ~+ s# D, ?making and breaking capacity IDm
9 @  J0 [" x$ s: MKey words: Confirmed at CTL
8 L5 h- E2 B$ e! T1 U8 `39th Meeting
Question:
" N$ c8 B* L$ b4 V9.12.13.1 refers to the test conditions prescribed in 9.12.1 and states that the impedance Z1 shall
9 L9 E* c$ ]% i- ]# C, H$ snot be used.
9.12.1 refers to the conditions in 9.12.1 to 9.12.12.
9.12.2 and 9.12.7.4 require the test circuits according to figures 5 to 9 together with impedance
Z2 to be used.
( \8 D! b1 h+ P$ Y9 oAccording to these figures the following inconsistency appears:
For 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.
! b& V3 L7 Z+ }7 s- W0 |8 R  RFor a two pole switch normally rated for 400 V, the rated residual making and breaking
) ]6 y$ |' T" m( k+ k. K& }) ocapacity has to be tested at 400 V.
7 B2 e& e$ k; K9 D0 mFor a three pole switch normally rated for 400 V, the rated residual making and breaking
. g2 N. X! ^1 h/ C* Q! N# C1 ucapacity 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
400 V, the rated residual making and breaking capacity has to be tested at 230 V.
" t% i, ~# U, j1 O3 `5 TDue 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
230 V, independent of the number of poles, and the relevant figures should be corrected.
( M+ c3 A# e, C3 _3 W: O. |0 JDecision taken at the SC23E WG2 meeting in Nice, October 2001:
  J8 V, [. ^8 H5 H" S) W. C% ~Extract from the minutes IEC SC23E_WG2_006:
+ ]) X( s5 M9 [# I+ j) B! T' CSC23E_WG2_010 request from Austria to update 61008 clause 9.11.2.3
- p7 I* X6 p) k& O2 |+ OThe proposal made by Mr Bachl was considered justified and accepted. During the meeting
4 ]) M# e! b. y+ S) g) G3 fWG2 decided that laboratories and certification bodies should be informed about this
( F1 v) M* ?. S4 c/ |- A% iimportant decision.
Therefore the following statement was drafted:
' h6 n, p$ i* z* c' O2
' ^$ ^* ~  E7 d. Q$ [Decision to be forwarded to CTL:
8 n2 g: z5 }4 t1 G% o% fIEC SC23E WG2 decided to correct the inconsistent test requirement in IEC 61008-1 (1996-12), subclause
5 ]$ p  l+ x9 k6 B; X# y9.11.2.3 and in IEC 61009-1 (1996-12), subclause 9.12.13 - Verification of the rated residual
' ]0 A: G' x; c' Mmaking and breaking capacity IDm.
The test voltage for this verification of the rated residual making and breaking capacity should be the
line to neutral voltage, independent of the number of poles of the RCCB or RCBO. This correction will
6 x! Z2 k5 o9 E/ [, dbe included in the next amendment or revision of IEC 61008-1 and IEC 61009-1.
; d* s4 D$ ]: u, X" UThe revised test circuit (fig. 7) proposed for the standard is attached.
8 \$ J" M; f1 K6 C

) @5 N% @7 @9 j* h7 E! z