|
|
|  DSH 543AA
: k0 \$ ~7 E E4 V. l0 T5 C, B$ Y! t |
| Representative test Voltage for induction motor-compressors/ }: s) t- U0 e( `% m/ s' o
| 4.8.1(3rd)/5.8.1(4th)
, W6 L9 t* x9 u& t7 r. x | 60335-1(ed.3) & 60335-1(ed.4)
7 D$ t( E* X6 u s7 G5 T |
0 U+ W5 W0 U4 ]" B' u7 y \, WQuestion:
3 e& R' `6 @ H, ^5 eFor locked rotor testing of induction motors, is testing at 50 Hz considered more severe than 60 Hz.
+ [1 y% e" Z; ~7 q) P( etesting, so that locked rotor testing at 50 Hz can be considered representative of testing at 60 Hz?
2 [! ]' R! v9 D2 P( QProposal (if any):
/ C3 }8 y5 |4 y; Y1 uFor induction motors including motor-compressors rated 50 and 60 Hz, with the same rated
* Q3 a# E% x7 [9 A8 q; @. E! Avoltage(s) at each frequency, locked rotor testing at 50 Hz is considered more unfavorable.
% K& y9 g/ Y9 c& R4 ]9 gFor induction motors including motor-compressors rated 50 and 60 Hz, locked rotor testing at
z5 r: m$ ~5 O2 {! F8 R( a# e50 Hz, at the highest rated voltage(s) is considered to be the more unfavorable condition. For9 P! l+ A C+ X" a$ x2 I
induction motors including motor-compressors rated 60 Hz, locked rotor testing at 50 Hz and
) x- g% @$ x' i; i/ Xrated voltage(s) is considered more unfavorable." H7 \1 e- I- A! S" O5 J
K d( t- ?9 L1 m
* v& c4 u9 ~- W' g+ l |
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发表于 2012-9-9 16:11
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