DSH 651 Abnormal operation

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 651 ! }7 F# J7 K% x4 h5 `. [

Abnormal operation 9 D6 c1 {) ^1 X/ `8 ^8 l

19 7 K) X9 x4 X1 z0 y

60335-1(ed.4) - a& G5 b7 l5 h, @6 A& c6 J/ o

3 f9 `2 n! o1 t: O  z1 LQuestion:
( b; Z" S" h8 g; ]: vCan VDR resistors be connected from live parts to earthed metal parts? If yes, can they be accepted under the condition?
) e. U% O" n% K5 b/ u' ZDecision:
4 \: f5 H9 \( fVDR resistors between live parts and earth can be accepted if the appliance complies with the insulation requirements of the standard, Clauses 13, 16 and 19, and the varistor has a weak part in any part of the circuit in series with it.Varistors are not reliable safety components and can short circuit at any time.
5 \6 D% O0 i5 P7 G7 ^2 c9 m) l- Q6 r
6 }! h% t- Y$ J2 A1 [1 }& G! e, E
# T) u: l/ a6 E2 B# {3 C) S