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|  DSH 428& Q, }1 q/ {6 r6 N% I0 A( \ P
8 h) _; r( q# O6 p& t% P | Insulation between an F-type applied part and enclosure1 n% |) M6 ]& C& N! \' l9 k
| 20.2 B-d and B-e
# h. W2 s7 A+ p7 A6 I3 v; q( W) }6 D | 60601-1(ed.2);am1;am2- }( F$ @" S8 M6 R
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/ g8 m) Q" B$ g vStandard(s)- (year and edition):7 b4 M, t, u" S
IEC 60601-1:1988 Ed.2 Am1+Am2
. s) w8 @6 T5 KSub clause(s): 20.2 B-d and B-e0 K6 u% B$ c6 z0 }+ `6 z
Sheet n°: DSH-428
9 d5 V& ]& q1 F$ R$ E0 I/ mSubject: Insulation between an F-type applied part and enclosure
7 V4 F2 ` M: \5 |) RKey words: F-type, applied part, enclosure* N1 Y% f$ c+ F- N
Confirmed by CTL at its 39th meeting, in Cologne
+ s1 f, z, s/ L/ C0 j" eQuestion:1 e& d7 K' q+ A& X
1) Different interpretations may occur about whether to use B-d or B-e to state the correct% T w) b9 o. q" X7 M2 S
insulation level between an F-TYPE APPLIED PART and the ENCLOSURE.
" Y H; W6 m2 h/ A2) B-e refers to “voltages stressing the insulation”.
/ |" e8 [4 B# zWhat is a hazardous voltage stressing an insulation?! }* g+ b3 N1 n$ U) P2 k8 N
Decision:
6 A: o: e, i9 v: g& {) v" [B-d is always applicable for a F-TYPE APPLIED PART. U equals maximum RATED SUPPLY
6 p, K$ ]- t. nVOLTAGE; or, 250V for INTERNALLY POWERED EQUIPMENT. BASIC INSULATION. l( |7 ?+ y! E/ M! N+ k
required.
6 P9 f* u. ]8 qIn addition B-e is also applicable if there is a voltage in the F-TYPE APPLIED PART. U equals) a; `$ U+ V' P: m7 s0 a
the voltage stressing the insulation in NORMAL USE including earthing of any PATIENT
, e! k, I8 p$ F% h2 [& l$ aCONNECTION.9 s& L$ G: _/ j) h& e
. P: L7 @3 S3 R( g, ~7 p; Q& Z7 |- x; T" M
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发表于 2012-11-5 10:31
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