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|  DSH 4262 e& C# ~ R1 ^: B* e. q
% A6 [* u, `7 w, N+ A3 }
| Triple insulated windings d, g Y5 r( I# U
| 57.9, 57.9.4
. X/ o$ J. Q3 i$ q- n+ w | 60601-1(ed.2);am1;am2# `" {) f0 T" s+ d1 F4 u- ?4 S
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+ ]9 \: h0 B5 a8 @Standard(s)- (year and edition):
- i& e1 ]! W- rIEC 60601-1:1988 Ed.2 Am1+Am2# O. L8 ]$ Q7 D* b- p
Sub clause(s): 57.9 57.9.4
* X* V: X# ~2 B6 r iSheet n°: DSH-426
2 `% m. u" u( h/ I; F4 T; q. ASubject: Triple insulated windings
$ a5 u" J, a% D& ]Key words: Triple, insulated, winding, transformer- W4 k, m% K% X: D& k
Confirmed by CTL at its 39th meeting, in Cologne
5 o7 d& [% o4 w% ^# {Question:
8 k( _& ] i5 V( @ w2 }2 CMany manufacturers are using a triple insulated winding wire on a transformer, where. V' v0 N2 v& c, e" O" l' P+ U% |
DOUBLE, or REINFORCED INSULATION is required between the primary and the secondary( M" w8 c# t3 W6 \' a' k) d) [+ y
windings. Is this permitted?2 E1 d: u6 [$ e2 m: v# _& [1 o
Decision:$ C6 Y/ N$ W( Q9 z
This is allowed, but precautions should be taken concerning possible mechanical damages to8 p3 ]8 O# g I1 ?' ]
the wires. Other requirements of 57.9 shall be applied.
* w6 I" ]3 U6 |# E! C- g: O) q
/ X% ]) n) ?! j& i& m* s! [
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