assign4 - 230 volts across the load What is the voltage at...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
University of Saskatchewan Department of Electrical Engineering EE 212 Assignment #4 Instructor: R. Karki _____________________________________________________________________________ 1. Calculate the reactive power from the capacitor in the circuit in Figure 1. Figure 1 2. The resistances and leakage reactances of a 10 kVA, 60 Hz, 2400/240 volt distribution transformer are as follows: R 1 = 4.2 ohms R 2 = 0.042 ohms X 1 = 5.5 ohms X 2 = 0.055 ohms The transformer core loss is 90 watts and the magnetizing current is 2% of the rated current. a) A standard open circuit / short circuit test is applied to the transformer. Draw diagrams showing the connection diagrams for the tests and indicate the reading on each meter. Draw the transformer equivalent circuit referred to the high-voltage side. b) The transformer is delivering 6 kW at 0.9 p.f. leading to a load on the low voltage side with
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 230 volts across the load. What is the voltage at the high voltage terminals? Compare the results using the T-equivalent circuit and an approximate equivalent circuit. c) What is the transformer efficiency under the load conditions in part (b)? 1 of 2 100/0 V-j2 Ω j ϖ M = j2 Ω j4 Ω +-2 Ω 2 Ω 4 Ω j3 Ω 3. A single-phase load is supplied through a 33000 V feeder whose impedance is105 + j360 ohms and a 33000/2400 V transformer whose equivalent impedance is 0.26 + j1.08 ohms referred to its low-voltage side. The load is 180 kW at 0.8 lagging power factor and 2200 V. Calculate the voltages at the sending end of the feeder and at the primary terminals of the transformer. Compute the real and reactive power at the sending end of the feeder. 2 of 2 33000/2400-V Transformer 33000-V Feeder Load...
View Full Document

Page1 / 2

assign4 - 230 volts across the load What is the voltage at...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online