Engineering, 19.03.2021 06:20 cmb6627

A 15 kVA , 4150/240 V, single phase transformer, has a core loss at rated voltage of 120W. Its per unit reactance is 0.01 and per unit resistance is 0.06. a)What is the primary side (HV side) voltage to have 240V at secondary side (LV side) terminals when the load on the low voltage side is 12kVA at 0.8 power factor lagging b)What is the efficiency of the transformer c)At what kVA does this transformer have its maximum efficiency

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, tjeffers90028

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Answers: 1

continue

Engineering, 04.07.2019 18:10, johnthienann58

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Answers: 2

continue

Engineering, 04.07.2019 18:10, agpraga23ovv65c

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.

Answers: 2

continue

Engineering, 04.07.2019 18:10, namira16

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

Answers: 2

continue

You know the right answer?

A 15 kVA , 4150/240 V, single phase transformer, has a core loss at rated voltage of 120W. Its per u...