DSH 526 Point on wave closing

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 526 - ?: z0 y2 U' f( A5 P 4 t/ D' p! e9 I/ x6 q2 t! T) B1 F

Point on wave closing ' @4 O7 b2 _/ ?" v) [

9.3.7.3 $ \0 u  ^) w9 W! ?

62019(ed.1) , o( `* }$ H* {' Z- j# G3 E! h

7 b  }3 c8 T: rStandard: IEC 62019: 1999
+ n2 v& S/ X! HSub clause: 9.3.7.3
Sheet No. DSH- 526
5 }) L% B$ o5 Q% F# p( ]8 WSubject: Point on wave closing
! [* V- v( l  J2 M' P* SKey words: - short circuit test - point on voltage wave
1 L$ }+ i( Z* u; V: ?6 r& K, |8 `Decision taken at 40th CTL meeting 2003
Question:
The issue concerns IEC 62019: 1999 (Auxiliary contact units) test procedure 9.3.7.3 in the test at
conditional short-circuit current (9.3.7). SC 23E is concerned that there may be discrepancies in test
- i  G- y) U( \6 Fresults made by different test stations, or at different times by the same test station due to the short
circuit being initiated at different points on the voltage wave.
$ j+ Q* a- E4 Z3 ~+ o6 O9 {Rationale:
& H3 H/ s# w5 D, P; q( j) uAt the meeting held in Beijing, SC 23E has asked that the improvement that they have made to the
* X) J9 `* {: ?' {6 o3 Ystandard be used by the CTL, as it will improve the repeatability of tests. According to IEC procedure
5 l2 T: O0 F. Q# Zfor technical work, this modification can only be introduced in the maintenance of IEC 62019, which
. c" U. C' I* J5 W$ Omay imply some years before being endorsed in revised publication.
, @. u* Y) e( D, f) c! EDecision:
In performing the test of clause 9.3.7.3 of IEC standard 62019, the following revised test method
# D9 C) d# ?( c; }- Sshall be used:
The procedure requires that the contact unit, in the closed position, be subject three times to short
4 w. x) ?( y, o/ b  I) Dcircuit, which is cleared by a short circuit protective device installed in series. Clause 9.3.7.3
! n; k3 U0 ]8 X# Kspecifies three operations. For the first operation, the making switch is synchronized with respect to
+ B  U6 c6 Z0 m: Y6 U) ~the voltage wave so that the circuit is closed on the point 0° on the wave. This point is then shifted by
6 N+ H. s$ i8 I" m! n# w30° for the second operation and to 60° for the third operation.