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|
|  DSH 543AA& G+ a( R/ _6 P5 Y# X0 w* H, f
4 m8 S, L! ^# F1 U
| Representative test Voltage for induction motor-compressors; n* C# o% z G4 o9 |" L
| 4.8.1(3rd)/5.8.1(4th)
3 z1 y, y/ ~' K | 60335-1(ed.3) & 60335-1(ed.4)
2 L& L3 v. N R5 u/ c6 m( i6 v |
8 ]4 s2 |4 Z+ c) G
Question:
2 o, i2 `, U5 }8 [+ HFor locked rotor testing of induction motors, is testing at 50 Hz considered more severe than 60 Hz.! }* Z) o' G( y; z' z6 Q3 ~
testing, so that locked rotor testing at 50 Hz can be considered representative of testing at 60 Hz?. k6 e* q* w! H& O( S [0 g7 u
Proposal (if any):
$ T1 P t( }& L! E; M( qFor induction motors including motor-compressors rated 50 and 60 Hz, with the same rated2 G9 o6 g, y& w
voltage(s) at each frequency, locked rotor testing at 50 Hz is considered more unfavorable.3 P/ ~7 o. v9 ?5 p: s
For induction motors including motor-compressors rated 50 and 60 Hz, locked rotor testing at# N8 `$ e T% w5 B4 a: e% t5 a4 q( m" y
50 Hz, at the highest rated voltage(s) is considered to be the more unfavorable condition. For
G7 _% U9 w; L2 Q/ q, dinduction motors including motor-compressors rated 60 Hz, locked rotor testing at 50 Hz and8 T* w( P" B) w1 y$ j) F9 q& u
rated voltage(s) is considered more unfavorable.+ X7 P1 K% m2 H. K1 i5 a: q
, ?& q+ N/ H2 c. P% ? c
4 R2 K! e$ ?' G& Y P' L: ^& }2 y, k+ q |
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