DSH 1033 Separation of welded contacts after short-circuit test

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 1033

Separation of welded contacts after short-circuit test

9.3.4.2.3.j (60947-4-1) 8.3.2.1 (60947-1) + f! M/ F9 m4 o6 `5 c3 w3 ^6 i7 }

60947-1(ed.5) & 60947-4-1(ed.3)

CTL Decision Sheet - DSH 1033
(replaces PDSH 1033 on 2012-10-22 by CTL Chairman decision,
will be kept remaining until final decision by 50th CTL Plenary Meeting)
8 Y: Y0 K4 n! z+ \& wSC 17B/Publication IEC 60947-4-1 Edition 3.0 2009-09
1 q. j8 K- a% F0 B9 X; XLow-voltage switchgear and controlgear –
Part 4-1: Contactors and motor-starters – Electromechanical contactors and
; i0 j6 L( P6 g$ k/ [motor-starters
3 d: g8 x4 t9 OINTERPRETATION SHEET
: n) Q; Q7 T. H/ ]3 S* }; oThis interpretation sheet has been prepared by IEC SC17B/WG2 on 2012-09-06
3 c/ L) @3 X: m& h: Y( zThe text of this interpretation sheet is based on the following documents:
: M# l; ^- u" j* c% nIEC 60947-4-1 ed 3: 2009
___________
Interpretation
In Clause:
9.3.4.2.3 Results to be obtained
8 j- d) H/ m3 B1 D) s& wThe contactor, starter, or the combination starter, the combination switching device, the
4 ^  k# ^4 u" a' T  f7 r+ J! uprotected starter or the protected switching device, shall be considered to have passed the
/ u/ k8 P6 m  Y' J* B2 {tests at the prospective current "r" and, where applicable, the prospective current Iq, if the
' ]1 [4 X* i9 o3 s" afollowing conditions are met for the claimed type of co-ordination.
; J; W9 C) _1 vType "2" co-ordination (all devices):
J No damage to the overload relay or other parts has occurred, except that welding of
7 }1 C9 P: v2 R, Tcontactor or starter contacts is permitted, if they are easily separated (e.g. by a
& Z2 l0 z, f  n! f8 A0 Uscrewdriver) without significant deformation, but no replacement of parts is permitted
1 N# u3 q8 w7 ?3 y! b' J  Kduring the test, except that, in the case of fuse protection, all fuse-links shall be replaced.
In the case of welded contacts as described above, the functionality of the device shall
be verified by carrying out 10 operating cycles under the conditions of Table 8 for the
applicable utilization category.
The text "if they are easily separated (e.g. by a screwdriver) without significant deformation"
shall be interpreted as follows:
"Easily separated" means a separation realised on site for example by:
- Energizing the coil of the contactor
2 Q: J# L& o% K$ f/ }- Using a tool (eg. a screwdriver) for separating the welded contact or for moving an operating
+ G" L6 y, G/ c: S5 [3 e; [means.
It is also allowed to remove covers or housing of the contactor according to the instruction of
! U4 O+ i6 Q- I- G' a* d, Bthe manufacturer.
"Without significant deformation" means a deformation without impairing the insulation of the
1 L( J# u4 u. Kcontactor (see d) and i) of this Clause) and successfully performing the 10 operation cycle
5 J) S5 c& V; q4 }6 c0 @6 Tspecified in the last paragraph of J.

) q5 u9 h+ h$ {% X( ?: Q0 D9 z  Z, ?9 d