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|  DSH 4288 f0 \* q R) I9 j
. A' `7 p7 H1 f, k" W3 D- p! v
| Insulation between an F-type applied part and enclosure
$ D! X( T( v+ Y5 R" h7 B( D+ i7 _. x | 20.2 B-d and B-e6 o+ c0 ]% u+ e0 |1 ]
| 60601-1(ed.2);am1;am2: H- I7 ~9 } `, A V
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Standard(s)- (year and edition):8 H2 ^, T8 @" [2 l& }& U- v) ?
IEC 60601-1:1988 Ed.2 Am1+Am2
* V' j# x% {' V- E( U+ |# |Sub clause(s): 20.2 B-d and B-e" l7 a$ R; U* f8 w0 z N( e5 f# e/ W
Sheet n°: DSH-428
4 R1 z- P2 [7 i% }2 iSubject: Insulation between an F-type applied part and enclosure
- ^9 d, g5 P, ~( V. A. IKey words: F-type, applied part, enclosure
4 Y* s! p1 ?) G4 w+ t" X# vConfirmed by CTL at its 39th meeting, in Cologne; }, K8 z% N9 b+ Y* H4 K+ T |5 x
Question:5 a" o& V3 z7 I6 U: v. H
1) Different interpretations may occur about whether to use B-d or B-e to state the correct' _$ g% C: D0 g; m" Y1 y
insulation level between an F-TYPE APPLIED PART and the ENCLOSURE.
( s7 L0 z# F* \. Q2) B-e refers to “voltages stressing the insulation”.8 y" j& t, f- n" m3 U4 l
What is a hazardous voltage stressing an insulation?
0 f) X( w1 |; B9 ODecision:
+ j5 ~ Z4 q4 `B-d is always applicable for a F-TYPE APPLIED PART. U equals maximum RATED SUPPLY" ^, D3 f5 M# p4 ~# m/ N/ ?
VOLTAGE; or, 250V for INTERNALLY POWERED EQUIPMENT. BASIC INSULATION+ z: y" }/ \1 W1 d/ T+ O
required.
% P3 f, N% Z0 G+ Y( J; wIn addition B-e is also applicable if there is a voltage in the F-TYPE APPLIED PART. U equals# z& ]1 O9 D3 v5 I a
the voltage stressing the insulation in NORMAL USE including earthing of any PATIENT g f$ q/ T; v
CONNECTION.
+ `7 i2 f1 c0 m! n3 G, V% V+ F$ o: x( q p! C
+ u0 a+ J J3 V2 v- s E |
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