DSH 590 Rule for creepage across grooves and similar surface discontinuities

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 590   _0 b5 i6 v# }" q

Rule for creepage across grooves and similar surface discontinuities

IEC60664-1: 1992 cl. 4.2 IEC60335-1: 1991 Annex E IEC60335-1: 2001 Cl. 29 IEC60730-1: 1999 Annex B IEC60950: 1999 Annex F IEC60950-1: 2001 Annex F IEC60065: 2005 Annex E IEC61010-1: 2002 Annex C IEC60601-1: 1988 Notes Figs 39-47 IEC61558-1: 1988 Annex A IEC61058-1: 2000 Annex A IEC60598-1: 2003 - IEC60745-1: 2001 Annex A IEC61008-1: 2002 Annex B IEC60947-1: 2004 Annex G

60335-1(ed.4) & 61058-1(ed.3) & 60598-1(ed.6) & 61010-1(ed.2) & 60950-1(ed.1) & 60947-1(ed.4) & 61008-1(ed.2);am1 & 60065(ed.7);am1 & 60664-1(ed.1)

Standard: IEC 60664-1/1992
IEC 60335-1/2001
IEC 61010-1/2002
9 U* M8 [1 S. f: B' j! x: OIEC 61058-1/2000
IEC 61008-1/2002
' L# o( ?* L+ r7 K. C) ?* M& WIEC 60947-1/2004
# @  b" `1 v8 Q% {IEC 60598-1/2003
IEC 60065/2005
; i( q1 b9 b  H; `1 _% H1 S- s# }" ZIEC 60950-1/2001
: B* ^8 w9 e) s" R( e* PSub clause:
See Table below
DSH N°: 590
Page: 1(1)
) d" h+ m5 E+ r8 u" S6 F; BSubject: Rule for creepage across
grooves and similar
! ?; G- f: C& f$ ]9 Nsurface discontinuities
, m, s- j5 ~) O' k" P4 JKey words:
- Creepage
& L1 n, F8 n6 J; ~4 u3 ]/ o  l, _- Grooves
% n9 b/ t9 u- v( @- Conducting path
* ~. t8 I) s" \* x$ P+ x- Shortest distance
5 s( _! g) F- ~- Through air
: F. @! v. u3 C$ j  }Decision approved
; K5 Z/ J$ P7 @by the CTL during
its 43rd meeting in
Johannesburg
Question: As can be seen from examples 2 and 6 of IEC 60664-1 sub clause 4.2 corners
3 {( P5 u5 [0 a+ M5 L2 e8 `1 mwith angles greater or equal than 90 degrees are not bridged. IEC 60664-1 does
/ C6 k2 J; K# Q3 r2 q4 H9 nnot contain specific information at which angle less than 90 degrees bridging
shall be applied. Some of the above mentioned standards specify that bridging
7 _8 P5 J! a7 [: zshall be applied for angles less than 80 degrees.
+ Q+ J* @, v1 i+ g# a/ m$ M. {( a6 ]Can this 80 degree rule be applied in general for all standards?
Decision: Yes. The 80 degree rule shall be applied in general for all standards.