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|
|  DSH 543AA) c5 H8 U5 G: N. q- W- \
1 T( r$ y z; _2 I( C4 `
| Representative test Voltage for induction motor-compressors" J3 [) Y% _# I( n; }9 Z
| 4.8.1(3rd)/5.8.1(4th)3 A$ n! i, j! q$ x+ Y- ` Y5 c
| 60335-1(ed.3) & 60335-1(ed.4)
- O' k& r. J1 l) r/ S! W0 j |
5 h" X8 G4 u1 v, f
Question:5 T+ Q; g' h" \) D
For locked rotor testing of induction motors, is testing at 50 Hz considered more severe than 60 Hz.
+ V! y+ Q& c' S0 f$ Z+ Ptesting, so that locked rotor testing at 50 Hz can be considered representative of testing at 60 Hz?
) I( R! P1 X* g+ I" a! |Proposal (if any):
/ x6 b6 p# B1 ~, IFor induction motors including motor-compressors rated 50 and 60 Hz, with the same rated n$ n& B" I' O. x; D
voltage(s) at each frequency, locked rotor testing at 50 Hz is considered more unfavorable.3 V3 x+ E5 ~/ _( e5 B* Y# U# I
For induction motors including motor-compressors rated 50 and 60 Hz, locked rotor testing at* d2 i3 {+ H6 s' {
50 Hz, at the highest rated voltage(s) is considered to be the more unfavorable condition. For# D% [' H4 C2 k
induction motors including motor-compressors rated 60 Hz, locked rotor testing at 50 Hz and$ D& ~0 T- Y( p. r- }( F
rated voltage(s) is considered more unfavorable.( c, W2 E- z4 j6 w& O9 i- B5 k5 l
, u3 `, c* @, F: l& _
7 U7 [6 Q9 W# J3 d- I- ?
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发表于 2012-9-9 16:11
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