WO single phase 100 kVA transformers, each having different leakage mpedances are connected in parallel. When a load of 150 kVA at 0.8 pf lagging is pplied * Both transformers will operate at identical power factors. Both transformers will operate at power factor more than 0.8 lagging. One of transformers will operate at pf more than 0.8 lagging and other will operate at pf less than 0.8 lagging. O Both transformers will operate at power factor less than 0.8 lagging.
WO single phase 100 kVA transformers, each having different leakage mpedances are connected in parallel. When a load of 150 kVA at 0.8 pf lagging is pplied * Both transformers will operate at identical power factors. Both transformers will operate at power factor more than 0.8 lagging. One of transformers will operate at pf more than 0.8 lagging and other will operate at pf less than 0.8 lagging. O Both transformers will operate at power factor less than 0.8 lagging.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:Two single phase 100 kVA transformers, each having different leakage
impedances are connected in parallel. When a load of 150 kVA at 0.8 pf lagging is
applied *
Both transformers will operate at identical power factors.
Both transformers will operate at power factor more than 0.8 lagging.
One of transformers will operate at pf more than 0.8 lagging and other will operate at
pf less than 0.8 lagging.
Both transformers will operate at power factor less than 0.8 lagging.
The daily variation of load on a 100 kVA transformer is as follows: 8:00 am to 1:00
pm - 65 kW, 35 kVAr; 1:00 pm to 6:00 pm - 80 kW, 50 kVAr; 6:00 pm to 1:00 am
- 30 kW, 30 kVAr; 1:00 am to 8:00 am - No-load. This transformer has no-load
core loss of 270 W and a full-load ohmic loss of 1,200 W. Determine the all-day
efficiency of the transformer. *
97.26%
98.26%
O 97%
98%
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