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

( l( B4 [$ A8 K! _9 a  H8 j& U8 ?

DSH 310

Components

14 5 }- q3 j& l; R' u+ B  J$ r

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

$ }2 M& R# T1 L/ K4 }
Standard:
. L/ x$ I2 [: {/ DIEC 61010-
: ]1 H7 h2 m2 R5 x% ^. u" r1:1990+A1:1992+A2:1995
# z- w" `1 T; ~+ ^Sub clause:
14
- E( V- T2 `' e* k! a7 y; `6 QSheet n. 310
& U. S! Z, m2 gPage 1(1)
* ], I! Z; g: w( p1 G/ t( NSubject:
$ X) B) r, v- B  ^Components
+ A) ?5 N7 V! c1 ?2 {Key words:
1 r6 m$ K! O4 W6 q- Transient
9 y! I% h3 U8 v1 _/ p. x- Suppressor
- Mains
Decision taken by
ETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
Question:
5 b9 t# e* ]- Q8 aIs the use of transient suppressor devices such as varistors accepted in equipment and, if so,
/ N8 [# q9 y4 ~" A7 ~' }' z" E4 _2 junder what conditions
' f, A. B0 [0 mDecision:
Varistors are accepted in the following conditions:
1 Between Live and neutral conductors after the mains fuse.
/ B3 M6 u5 W9 P0 ANo component approval demanded.
; Q7 s' Z& _  I) f8 S) i" E2 Between Live and neutral conductors, before the mains fuse.
  [1 Q3 `, i2 c6 b! wOnly accepted if the component is approved to an international standard (IEC 61051 or
7 g6 I$ X6 d2 t2 Z* U" oCECC 42200)
3 Between Live and Earth conductors (before or after the mains fuse)
4 m2 I- K8 n! X: k8 ]( Ya) pluggable equipment
devices are not accepted
( {  Y. k! t6 Z' }" Lb) permanently installed equipment
devices are accepted as in 1 and 2 above.
; u/ k; m! u( O$ O8 d- ^Note: Components shall be physically mounted in such a way that no hazard can arise in the
event of the device failing catastrophically.
Explanation:
5 }1 v) p, m! B, J+ v. j$ kVaristors are semi-conductor devices and therefore, cannot be treated as high integrity
* l1 S( Z" x+ \. Z. v9 L) Sdevices and must therefore, always have additional protection.
Varistors in the equipment or installation coupled with safe construction and approvals meet
2 J. b( ]$ p& X! ythese requirements except where the disconnection of earth is possible as a single fault. In
this case, the slow deterioration of the device with time, allowing an increase in earth
leakage current, is not acceptable and the devices are, therefore, not allowed.
# y, X; T' S! E" }' Y

" A7 F3 ~$ p' W+ E6 z
* O+ r4 L' ~- @* Q