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|  DSH 426; ]& d0 H3 a. x9 s1 V/ y& y
, D) |0 @+ ^# O; Z- _ | Triple insulated windings# X2 l% m; j) c3 F' A
| 57.9, 57.9.4
/ f# ~2 t- A0 \! F# | | 60601-1(ed.2);am1;am2
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0 z/ Y- ?0 l; n ?6 a# Z. L5 h5 v# vStandard(s)- (year and edition):5 {; }; s+ Q0 z5 T7 F) M- D
IEC 60601-1:1988 Ed.2 Am1+Am2% A" I% ^! P# J5 e" L
Sub clause(s): 57.9 57.9.4
, J" ^6 o1 A# QSheet n°: DSH-426
& V& E9 c1 }+ |, l% g5 R3 cSubject: Triple insulated windings4 h0 H- |$ O) z* F$ L4 o
Key words: Triple, insulated, winding, transformer% p) k5 a2 g8 D* Q9 \2 E, S# C
Confirmed by CTL at its 39th meeting, in Cologne
% Z5 I8 h6 F9 ?( I2 D/ vQuestion:
. b. u1 y, G! l( X# K- wMany manufacturers are using a triple insulated winding wire on a transformer, where
p7 k2 {# X; L3 pDOUBLE, or REINFORCED INSULATION is required between the primary and the secondary
: |7 z+ a0 {% N3 Y% X+ m( {windings. Is this permitted?! h7 e# s1 ^" G9 B" [: J
Decision:4 u- n4 {$ z& h9 w3 ?5 \1 r5 o
This is allowed, but precautions should be taken concerning possible mechanical damages to( ?. C; ]) G- q
the wires. Other requirements of 57.9 shall be applied.- |, N8 j3 p+ @0 i: i
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