4-Assignment4

4-Assignment4 - ELECTRICAL ENGINEERING DEPARTMENT...

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

View Full Document Right Arrow Icon
ELECTRICAL ENGINEERING DEPARTMENT CALIFORNIA POLYTECHNIC STATE UNIVERSITY EE 255 Assignment #4 P roblem #1 A 100-KVA, 11000/2200-V, 60-Hz single-phase transformer has the following equivalent circuit parameters, referred to low-voltage side: , 1440 , 4950 , 49 . 2 , 531 . 0 = = = = m c eq eq X R X R The transformer is supplying at 2200-V rated load at a power factor of 0.8 lagging. Use the approximate circuit to determine: 1. The voltage regulation of the transformer, 2. The efficiency of the transformer. Problem #2 A 100-KVA, 60-Hz, 12000/240-V single-phase transformer is tested to obtain the equivalent circuit parameters using a short-circuit test. The voltage applied to the 12000-V side is 600 V with a short-circuit current equal to the rated current and short-circuit power of 1200 W. a. Find . and eq eq X R b. Assume that the transformer supplies a load of 100 KVA at 240 V and 0.95 PF lagging on the secondary side. Determine the voltage required at the primary side and the power factor. Problem #3
Background image of page 1

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

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

This note was uploaded on 12/19/2011 for the course EE 295 taught by Professor Alishaban during the Fall '11 term at Cal Poly.

Page1 / 2

4-Assignment4 - ELECTRICAL ENGINEERING DEPARTMENT...

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