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 9 z) d8 k6 P$ x. Q6 Q4 l" D

Components

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

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+ o5 }8 J. k/ X3 v: s( nStandard:
$ H# u5 U0 z, X* C9 w% }6 |$ F6 _( q! LIEC 61010-
( w8 r1 P6 h1 S9 H  h6 t6 x. Z( r1:1990+A1:1992+A2:1995
Sub clause:
14
* R7 O6 R5 C/ n( ~Sheet n. 310
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Subject:
Components
Key words:
- Transient
( F( C7 X: L% O0 q5 o) q4 y" Z- Suppressor
- Mains
Decision taken by
ETF3 and confirmed
( d" e% E: i: i" ~  Q+ _4 Jby CTL at its 38th
meeting, in Toronto
Question:
) |' _, r0 X% @Is the use of transient suppressor devices such as varistors accepted in equipment and, if so,
under what conditions
' H3 h- ^8 u' G8 y7 G- N& fDecision:
3 V! Q% ^# \/ i* p4 S; |Varistors are accepted in the following conditions:
1 Between Live and neutral conductors after the mains fuse.
No component approval demanded.
2 Between Live and neutral conductors, before the mains fuse.
7 z2 J; \( F( d  H4 o$ B$ ]' BOnly accepted if the component is approved to an international standard (IEC 61051 or
% ^! j7 Y$ g- {3 v" bCECC 42200)
- V. y9 w4 h) W% m1 D3 Between Live and Earth conductors (before or after the mains fuse)
3 X) j  \5 h0 d& a9 P2 Qa) pluggable equipment
; A: M- t0 i7 l+ a& }devices are not accepted
b) permanently installed equipment
% ^" J5 w' r. w# m# Sdevices are accepted as in 1 and 2 above.
Note: Components shall be physically mounted in such a way that no hazard can arise in the
event of the device failing catastrophically.
  d# }  T8 K7 a4 `9 ~Explanation:
0 C' a; g6 q& U5 U; g: i- yVaristors are semi-conductor devices and therefore, cannot be treated as high integrity
$ h' a# D4 T5 P* k: Ydevices and must therefore, always have additional protection.
Varistors in the equipment or installation coupled with safe construction and approvals meet
* K' t; e4 p0 ^8 Jthese requirements except where the disconnection of earth is possible as a single fault. In
9 b9 H& D8 e; @' ^- S* Jthis case, the slow deterioration of the device with time, allowing an increase in earth
6 e, B9 l8 P8 z; O2 k2 pleakage current, is not acceptable and the devices are, therefore, not allowed.
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