DSH 738 Insulation properties of housing of subclass Y capacitors

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DSH 738 $ R/ o$ X( M' F. m

Insulation properties of housing of subclass Y capacitors 5 [% f# j6 B: S) N8 Q: j

1.5.7.2 (IEC 60950- 1:2001) 1.5.6 (IEC 60950-1:2006)

60950-1(ed.1) & 60950-1(ed.2) ( V' \2 B/ M7 ]8 E: [# l

Standard(s):
IEC 60950-1:2001
8 O  m0 g% o' C8 ?, aIEC 60950-1:2005
( B, B( Z2 g" c0 g) V1 J, Y/ ZSub clause(s):
! D7 m6 ]1 {2 P1.5.7.2 (IEC 60950-
9 y  s8 n7 t. G7 h1:2001)
1.5.6 (IEC 60950-1:2006)
Developed by ETF 2
0 Y1 E" c$ L) z, RQuestion 68
( X- _1 v0 z$ g+ V. n: t0 lSubject:
Insulation properties of housing
of subclass Y capacitors
Key words:
- subclass Y capacitor
- housing
% d# T7 x: \3 U8 _, H- insulation
Decision approved
8 G# O6 T2 S( V' z* `at the 46th CTL
* w9 X, P6 P9 D+ LPlenary Meeting
2009
5 M+ P0 `3 r6 ~Question:
+ @+ l( J( r" v8 k3 CCapacitors complying with IEC 60384-14 are permitted to bridge certain levels of
7 I! U2 P) v! g8 r* rinsulation. Does the housing of such capacitors provide this same level of
insulation?
Example: A subclass Y1 capacitor is permitted to bridge double or reinforced
insulation. Is it permitted that this capacitor housing serves as double or reinforced
. g, t  D( B  l1 h2 f+ t8 Sinsulation to other circuit parts, such as a transformer core?
Decision:
3 s$ I7 D1 a: Q& a3 Y- s. THousings of IEC 60384-14 subclass Y capacitors are considered to provide
8 w8 W8 d9 j# I7 E& G) a- binsulation levels as specified in IEC 60950-1 (e.g. Table 1D for 2nd ed.) with the
exception of the areas near to the leads.
8 @, C0 p" R4 `  w5 f