DSH 543AA Representative test Voltage for induction motor-compressors

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DSH 543AA

Representative test Voltage for induction motor-compressors   D. W* L2 g" M: W6 D9 X: F

4.8.1(3rd)/5.8.1(4th) 3 n8 p# s7 h1 B* d

60335-1(ed.3) & 60335-1(ed.4) $ _$ u4 H" W: }. ~- o

% o- i1 ]! M9 U# tQuestion:
; X( D5 l9 O  ~0 h! YFor locked rotor testing of induction motors, is testing at 50 Hz considered more severe than 60 Hz.
  u  b2 m/ D, l% u0 s2 i# X1 E7 stesting, so that locked rotor testing at 50 Hz can be considered representative of testing at 60 Hz?
# z( E9 E9 O1 ?9 O: \% S0 L9 ]7 u! Z/ XProposal (if any):
For induction motors including motor-compressors rated 50 and 60 Hz, with the same rated
' M/ Z0 f' H* Z" ?1 Wvoltage(s) at each frequency, locked rotor testing at 50 Hz is considered more unfavorable.
* T) `% n# Z# W# fFor induction motors including motor-compressors rated 50 and 60 Hz, locked rotor testing at
50 Hz, at the highest rated voltage(s) is considered to be the more unfavorable condition. For
$ i4 G9 H  M& Ainduction motors including motor-compressors rated 60 Hz, locked rotor testing at 50 Hz and
9 ~! Z* v- g% ~/ t0 Irated voltage(s) is considered more unfavorable.