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Class E是绝缘耐热等级分类老的标识方法，Class 120是现在标准规定的标识方法。
9 n3 |) E! ^' O# W7 _# q' J, ` Y/ N, F8 S$ p, ?
以下引自IEC62114：
( _& a1 h- P; R; A7 D! B' q8 aThermal class designation Historical designation* E: q( `9 }8 j% {2 z) m( J
90 Y
+ w* l& f# d8 _$ T# G4 [ 105 A$ _6 |2 F# K9 ^! M* I, X1 P
120 E
4 Q8 h* K# o$ l+ }3 x% ^! Z) ^& ? 130 B
) {% N; a; R4 R* N* q8 V M- @ 155 F$ i8 o5 @: `7 @& I; y# P
180 H7 i/ [; |8 U' K
200 200' P+ a9 m- @3 Y4 }( B" q
220 2208 ?1 e0 J# K x5 V1 d
250 250
5 N* ~9 H* p5 v* \! m# Q6 u6 u8 K z' i T) x
Designation of thermal classes over 250 shall increase by increments of 25 and be designated accordingly.* Y) n3 a$ t" _3 b d9 U1 [
: P% _2 U1 }3 X4 C! N: JNOTE The old class C that was used for all temperatures above 180 °C has been replaced by the above thermal classes and is no longer valid.
; J; X4 P% {- Z" D' WIf desired, the historical designation may be added in parentheses, e.g. class 180(H). |
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