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, y1 x, W( {4 V4 H! H; W& J8 CStandard:
: y7 W; W1 y. J# p5 b, v& jIEC 60335-1: 3rd ed. 1991" ^" _8 w0 ?6 w) E/ L4 i% e, X
Sub clause: 11.8 ' T- z- O$ G7 M3 A& M4 h
Sheet n°: 217. r* G7 `% `; w4 c" d
Subject: heating Key words:1 F, }* ?8 h% {! g7 \* k% w
- ambient temperature more than 25 °C
' C* U, ]( {! C8 t- winding temperature: Q% S4 I) f5 s* V0 v1 X8 }
Decision of: 27th CTL meeting to be reaffirmed at 39th meeting.
" C, N/ b6 K5 \1 R/ J/ ZQuestion:, j7 k7 b, d q2 e) b8 x: I+ ?
Which of the following limits is applicable in the case of a motor with a Class H insulated8 ^( b* ?: ~: m8 U
winding operating at an ambient temperature more than 25 °C (i.e. 120°C)?) c' _) V# @0 U Z- G1 R
1) 140 °C (stated in table 3) + 25 °C = 165 °C
& k1 V0 M) \$ o4 z. ?" i2) 170 °C (according with IEC 43-1/1983 table 3)
9 I# r4 F T$ {3) 180 °C (according with IEC 85/1984, sub-clause 2.1 “thermal classes”)
+ S p: S6 r- s: Y3 y3 P/ WDecision:/ x8 k$ r+ j4 \+ l/ [5 l& u8 d
165 °C, as specified in case 1); Y' S1 {4 X3 i e+ O
; c* b# T( d9 o& l# e
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发表于 2012-9-14 13:58
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