DSH 309 Overcurrent Protection, Note

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

: D3 c( F0 M! g5 A

DSH 309 , r, p# c1 ^! `* W2 ]' G

Overcurrent Protection, Note   @" s4 n6 W/ I8 H+ A- m: u- {

9.6 ( @# L1 s/ \3 _5 [

61010-1(ed.1);am1;am2 6 `# L+ ~2 |) N7 M8 b! X: t" N9 w

Standard:
" e1 n& o2 F& MIEC 61010
Sub clause:
9 [% A4 R9 E4 Q( G( n) a$ A9.6
Sheet n. 309
3 a) m2 U! a7 T1 r0 PPage 1(1)
' Q; v% y: G7 v% w% ?Subject:
, t' U& ]5 Z8 UOvercurrent Protection, Note
Key words:
5 l* q1 t, ^% e7 r- x3 B5 ]  f' a+ C- Mains
- Fuse
2 P. t% U% z; T$ l2 _. ]Provisional decision taken by ETF3 and confirmed by CTL at its 38th meeting, in Toronto
# D. H. C3 ~( T; s# Z) h7 H: zQuestion:
6 |: G: n  F$ ^& uThe note recommends that both supply conductors are fused. How is this recommendation applied?
Decision:
The standard allows the use of a single fuse and therefore, under CB rules this is accepted.
7 ^5 ]: {( R( X, C; D$ S7 `% lExplanation:
Where a supply is not polarised then equipment employing earthing for protection should be provided with a fuse in both mains conductors.
# y, ^9 L* k/ {9 \% ~7 g, CEvaluators are requested to draw the attention of submittors to this situation and make an informative note in the report as appropriate.
4 q$ _0 @3 M, ]0 k
$ Y+ T$ N+ t8 z0 M3 T, i% S
: E0 N( q/ B- l6 ^