DSH 738 Insulation properties of housing of subclass Y capacitors

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DSH 738 0 i% g' A7 m& o+ M1 b

Insulation properties of housing of subclass Y capacitors ! T3 Z) U7 b' {& }& {! l

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

60950-1(ed.1) & 60950-1(ed.2) + E. `+ M8 {, M" V! G9 [

4 [" s- @( }+ M' `Standard(s):
+ e1 e- B; B; ?$ F; \5 b" aIEC 60950-1:2001
IEC 60950-1:2005
Sub clause(s):
1.5.7.2 (IEC 60950-
1:2001)
1.5.6 (IEC 60950-1:2006)
2 \+ n$ c# O" u8 N. S3 GDeveloped by ETF 2
Question 68
Subject:
Insulation properties of housing
of subclass Y capacitors
* q7 U; I$ v" M# e  f% FKey words:
- subclass Y capacitor
3 @8 }3 N* g9 P- housing
8 A1 m) y1 K: Z- insulation
- n* a* I; S9 A1 `1 e7 U/ O& zDecision approved
at the 46th CTL
& r# }) S( L! W8 z% ~Plenary Meeting
8 J2 G, A5 v+ L& W  d2009
0 G: c/ X! D/ }; bQuestion:
Capacitors complying with IEC 60384-14 are permitted to bridge certain levels of
insulation. Does the housing of such capacitors provide this same level of
insulation?
Example: A subclass Y1 capacitor is permitted to bridge double or reinforced
1 Z7 b2 v( z1 Qinsulation. Is it permitted that this capacitor housing serves as double or reinforced
4 z/ g8 r4 `# X2 I% m+ n* [insulation to other circuit parts, such as a transformer core?
Decision:
Housings of IEC 60384-14 subclass Y capacitors are considered to provide
) M) O6 K& t! Pinsulation levels as specified in IEC 60950-1 (e.g. Table 1D for 2nd ed.) with the
2 G( u% [$ n7 a& ^) ~) yexception of the areas near to the leads.
& V! g' }+ W% h1 E1 y
# f2 H7 t; S; t2 O