DSH 1031 Crossing of triple insulated winding wire

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 1031

Crossing of triple insulated winding wire & X+ i9 }' e! J( \3 F* j

2.10.5.12

60950-1(ed.2);am1 & o/ `$ B: k# _. ?: F

Standard(s) (incl. year) Subclause(s) No. Year
IEC 60950-1:2005/A1
5 {6 V, u: j# v2.10.5.12 DSH
! S) K8 Z4 Y9 N. k! r$ Q1031
8 \8 u5 ?- z+ w+ V. E7 T! N& P, J2012
  |$ I5 Y9 _" vCategory
OFF
0 k  ^, y6 w0 j, L  o$ sSubject Keywords Developed by Approved at
) s; z5 w4 g2 @5 jCrossing of triple
# y* c' _. C$ i, [2 j, ~insulated winding wire
-Triple insulated wire
- Mechanical stress
relief
0 I0 V; s- d4 o5 U- Physical separation
ETF2 2012 CTL
  P8 b% \& {6 {1 qPlenary
" z+ r, T/ C. A3 e% R5 NMeeting
Question
Transformers in switching mode power supplies often contain triple insulated winding
wire (=TIW) (wire with extruded insulation layers). These windings typically cross
5 @- e( l0 \/ i7 E, ceach other at an angle between 45° and 90° at the exit points as marked in the
Figure below.
In the given example TIW is used for secondary circuit windings, whereas the primary
circuit windings are made of enamel coated wire. Distances between the point where
TIW crosses itself and primary circuit winding wire do not comply with Basic
) _/ Z# `: a, w0 }; r1 h( \(respectively Supplementary) Insulation requirements.
Is it necessary in the given design to provide either mechanical stress relief at the
crossing point(s) of TIW, or an additional insulation level (e.g., Basic
# A& Q3 s% l& U5 K(Supplementary)) between the crossing point(s) of TIW and primary circuit parts
(winding)?
Decision
No

' v, V0 p1 N7 f
6 }: [6 q( p( b+ S$ ?$ ]