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MMLU-Pro / 11601 / Test data for a 10-kva, 2,300/230-volt, 60-cycle-per- second…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

Test data for a 10-kva, 2,300/230-volt, 60-cycle-per- second distributiontransformer are as follows: open- circuit test, with inputto low side, 230 volts, 0.62 amp, 69 watts?short-circuit test, with input to high side, 127 volts, 4.9 amp, 263 watts? ohmicresistance test with input to low side 1.89 volts (d - c), 41.0 amp (d - c), and with input to high side, 23.4 volts (d -c), aV_2 = 2,300 volts, I_2'_rated = 4.35 amp, R_e1 = 10.9 ohms,andP_c= 69 watts. For the above transformer, find the efficiency when it is operatedat rated frequency and rated voltage for: (a) rated kvaatpf= 1; (b) one half of ratedkvaatpf= 0.6 lead.

category

engineering

options

  1. 90.5%, 98.3%
  2. 93.8%, 92.4%
  3. 92.5%, 95.3%
  4. 97.3%, 96.1%
  5. 95.6%, 93.7%
  6. 99.2%, 97.5%
  7. 98.1%, 94.6%
  8. 96.7%, 97.8%
  9. 91.3%, 90.7%
  10. 94.1%, 95.9%

src

stemez-ElectricalMachines

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Source and history

upstream_id / Original problem ID
11601
task_id
d44ce620-fd58-5814-9bf0-4424c540d411
task_key
default--test--11601
task_revision_id
1
config / split
default / test

Official source

initial import