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|
|  DSH 543AA: |3 D9 e+ S1 N
0 K- b3 \2 a! V" G | Representative test Voltage for induction motor-compressors' V x3 @: W& V; c& x# {4 [; C
| 4.8.1(3rd)/5.8.1(4th)
; ~/ L: y' T, M N' }$ @ | 60335-1(ed.3) & 60335-1(ed.4)
8 S+ @& K X8 k% I1 `8 N+ w: ~7 H |
, J! S+ l+ f8 q4 g- z$ [: a: A
Question:+ ^% X# R5 Q- u- P3 r& v8 `5 |
For locked rotor testing of induction motors, is testing at 50 Hz considered more severe than 60 Hz.. {$ T0 i6 z" c* p6 `3 K8 B
testing, so that locked rotor testing at 50 Hz can be considered representative of testing at 60 Hz?0 N. z6 Z6 d/ S8 e1 c: g# [: l" R; N
Proposal (if any):
& t3 n5 ^* C$ B. pFor induction motors including motor-compressors rated 50 and 60 Hz, with the same rated
6 V$ `, k4 d/ L5 V9 Y* p+ Fvoltage(s) at each frequency, locked rotor testing at 50 Hz is considered more unfavorable.2 v9 x/ ?% G; E/ K6 e3 n
For induction motors including motor-compressors rated 50 and 60 Hz, locked rotor testing at
c' o9 b; G! q G( H+ w50 Hz, at the highest rated voltage(s) is considered to be the more unfavorable condition. For
8 d0 C1 [. d" g2 t9 {/ D+ einduction motors including motor-compressors rated 60 Hz, locked rotor testing at 50 Hz and
. g. L& N5 t" t4 b# G& \' J6 z" erated voltage(s) is considered more unfavorable.1 M; e g) b" N5 x$ ]% D( q
% O2 f I' \1 W( X
6 W9 p: y' Z' ^0 l3 M- l( S
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发表于 2012-9-9 16:11
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