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|  DSH 428) E5 N4 |& e V- D% |" m. L
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| Insulation between an F-type applied part and enclosure
) M& b* ?0 S' v( U( l/ `/ k, O. m | 20.2 B-d and B-e
2 n% w! b3 c) H0 h# f9 \ | 60601-1(ed.2);am1;am2. U; e1 \5 m$ U" y: H/ N3 j
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Standard(s)- (year and edition):$ q, A" a8 o( G
IEC 60601-1:1988 Ed.2 Am1+Am27 y6 l9 ?1 t! C1 l8 I
Sub clause(s): 20.2 B-d and B-e) B$ J8 C0 ^$ O5 n
Sheet n°: DSH-4289 m' B! b9 v* w- N& I& G
Subject: Insulation between an F-type applied part and enclosure
; u& e, m) A* F+ i; ZKey words: F-type, applied part, enclosure% F1 Z% G4 K2 h' N9 W& ]
Confirmed by CTL at its 39th meeting, in Cologne7 Z, J' U3 M1 {+ Q
Question:
: A: e% f) q6 z& F0 k1) Different interpretations may occur about whether to use B-d or B-e to state the correct
6 _' S" M$ r& Q; c- l/ m* T( iinsulation level between an F-TYPE APPLIED PART and the ENCLOSURE.
( y0 j& y! e) u0 S. F. y2 q" }' r' k' D2) B-e refers to “voltages stressing the insulation”.2 G9 c$ }7 S' G
What is a hazardous voltage stressing an insulation?
, d0 W; e8 r9 H) ^: z$ W S1 e( BDecision:
; F, H: N( Q9 H' L' _. }B-d is always applicable for a F-TYPE APPLIED PART. U equals maximum RATED SUPPLY
4 @( z+ v; p$ sVOLTAGE; or, 250V for INTERNALLY POWERED EQUIPMENT. BASIC INSULATION
7 j4 e# U( d4 H7 ^5 Jrequired.$ f3 _$ z( z6 Z3 X! l H# p
In addition B-e is also applicable if there is a voltage in the F-TYPE APPLIED PART. U equals
- N- D; S* Y5 w: P6 l4 Q6 S. O8 [the voltage stressing the insulation in NORMAL USE including earthing of any PATIENT# _$ |& t5 g) [$ M4 j: M# E
CONNECTION.
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