DSH 310 Components

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

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DSH 310

Components

14

61010-1(ed.1);am1;am2

Standard:
* C; h& {  i8 [% z1 dIEC 61010-
2 p" x5 [5 E- o3 @( D, D9 {1:1990+A1:1992+A2:1995
1 e" i1 g$ E3 w$ i4 D# ]Sub clause:
' ^  c; q  t4 v' [2 a14
& e) m, H5 r0 X4 S3 ?4 s9 o: vSheet n. 310
3 v2 ]8 r2 Z/ R! S* }Page 1(1)
% I' ]3 O, F3 O9 h+ zSubject:
Components
3 j' R2 D8 o# m% A% `: K% k2 kKey words:
- Transient
9 }' R+ Z4 }2 ^0 V, [; t4 N1 O- Suppressor
+ W5 m2 O, i5 [9 \3 L: r( [! ]- Mains
/ b3 e4 ~: K; {Decision taken by
ETF3 and confirmed
. \( @4 i% I2 _by CTL at its 38th
( T+ x- B5 Y/ X$ A! U. K* wmeeting, in Toronto
2 o: O- i# j) Q1 \# ?8 I6 `) zQuestion:
6 h# A0 y7 @1 m8 e. Y6 KIs the use of transient suppressor devices such as varistors accepted in equipment and, if so,
under what conditions
5 o5 Q5 I, c# D0 I3 u6 q* f0 yDecision:
Varistors are accepted in the following conditions:
* H& j7 I& m7 o7 u1 Between Live and neutral conductors after the mains fuse.
No component approval demanded.
2 Between Live and neutral conductors, before the mains fuse.
Only accepted if the component is approved to an international standard (IEC 61051 or
CECC 42200)
3 z8 Z7 y3 Z+ T6 g. }) B& L3 Between Live and Earth conductors (before or after the mains fuse)
a) pluggable equipment
- N8 @4 n4 R& c. xdevices are not accepted
b) permanently installed equipment
! p8 O& \( n- f7 h& e; `: c1 Cdevices are accepted as in 1 and 2 above.
! M% H5 r( h. hNote: Components shall be physically mounted in such a way that no hazard can arise in the
, ]( g9 M2 D3 m; C+ M7 ]event of the device failing catastrophically.
Explanation:
Varistors are semi-conductor devices and therefore, cannot be treated as high integrity
devices and must therefore, always have additional protection.
% I6 S2 s) [; E3 nVaristors in the equipment or installation coupled with safe construction and approvals meet
' V0 n2 ~- ~  ~& ithese requirements except where the disconnection of earth is possible as a single fault. In
  ~  `6 T  g- k3 g+ _this case, the slow deterioration of the device with time, allowing an increase in earth
0 D7 J; H, m, jleakage current, is not acceptable and the devices are, therefore, not allowed.

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