DSH 721 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 721

Abnormal operation 2 t1 C# l1 ~. ^. W4 S( l

19.11.2 $ \' A/ K- c! J2 S/ N

60335-1(ed.4);am1;am2

' b" t; m( t( v; W8 a( ~  h: X8 d- uQuestion:
( M* v2 v, [: Q' BIn clause 19.11.2 of IEC 60335-1 (Ed 4.2) failure conditions in items a) through g) apply to circuits continuously connected to the supply mains. The question is in relation to the conditions that are assessed after the 19.11.2 failure tests in standby mode operation:
Are tests of clause 19.11.3 and 19.11.4 applicable after the first failure resulting from clause 19.11.2 testing?
Decision:
$ R1 n/ M; w1 Z4 r8 ^The tests in 19.11.2 are done in a specific order and in such a way that at first a hardware failure according to 19.11.2 is applied in the Protective Electronic Circuit (PEC) and, then, second, the relevant tests of clause 19 protected by this PEC are applied conducted.
It must be understood that if a hardware failure according to clause 19.11.2 is applied in the PEC under consideration and it causes a shut down, then as per 5.3, it is meaningless to apply the relevant test of clause 19 protected by this PEC.
However, it must also be understood that the PEC providing protection during the relevant test of clause 19 will have to be tested according to 19.11.2 as an electronic circuit. If during this test a shut down occurs, 19.11.3 requires that the 19.11.2 test is repeated with a fault in the circuit that caused the shut down.
5 X, N( o) ^6 q( g1 q& q" V, h# _

2 {( y1 w: w, _; X) y1 }3 z( {/ [