DSH 440 Short-circuit of motor capacitors

admin

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 440 . K" f; e9 f: T( _$ z% V  _7 c& E

Short-circuit of motor capacitors

19.7

60335-1(ed.3)

Standard: IEC60335-1:1991, 3rd Ed.
! U+ X# M; C+ D- a/ C& _, mSub-clause: 19.7
Sheet No. DSH-440
Subject: Short-circuit of motor capacitors
# j4 }$ J1 Z3 ^5 Q% H6 @1 NKey words: -short circuit   -motor capacitor
Decision taken at the 40th CTL meeting 2003.
& g5 ]& q! q: M8 Z6 i6 SQuestion:
TC 61 requested CTL to clarify the test procedure for short-circuiting capacitors in accordance with Sub
clause 19.7 of IEC 60335-1.
( x2 Q/ F# z8 X; Q; dDecision:
If the design of the circuit is such that short-circuiting of one capacitor will result in the short-circuiting
of the second capacitor, only one capacitor needs to be short-circuited. This is endorsed by the sub clause
4.3 that states “If it is evident from the construction of the appliance that a particular test is not
2 r  [$ B/ {+ U" [6 Y' M$ Napplicable, the test is not made”.
The followings are examples of the circuits.
5 `: g  O# w' f9 l4 BIn the Example A:
. G$ V6 D9 F0 [; a4 {Short-circuit of capacitor (Cb) terminals is necessary according to the requirements. For the
$ N8 C3 L! x! k! ycapacitor (Ca), short-circuit of its terminals when motor is running is not necessary because
the circuit is opened (the switch is opened).
" a0 {) E9 f* _5 U# X, ?9 m$ ^$ t$ a1 kAlso short circuit of its terminals (Ca) when the motor starts is not necessary because it is
4 F# ^) r3 o5 galready covered by the short-circuit of Cb terminals.
0 O. G1 D! f1 E; q, F+ w4 wIn the Example B:
; {9 o; k' l2 l! C# LOnly one short-circuit, either Cb1 or Cb2 terminals, is necessary because the testing of one
covers the testing of the other one. Also the short-circuit of Ca terminals is not necessary
because of the reason stated in the Example A.

* o4 X2 l$ q4 Z1 J8 z. C) n) z) |$ p

% l+ p* p/ N! z$ y% q" j' o! w