A 5000 kVA, 6600 V , 3 - phase , star connected alternator has a resistance of 0.75 ohm per phase. Estimate by zero power factor method the regulation for a load of 500 A at power factor (a) unity, (b) 0.9 leading and (c) 0.71 lagging, form the open circuit and full load, zero power factor curves: Field current, A Open circuit voltage, V ZPF curve, V 32 3100 0 50 4900 1850 75 6600 4250 100 7500 5800 140 8300 7000
Three-Phase Transformers
Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.
Transformer
Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.
A 5000 kVA, 6600 V , 3 - phase , star connected alternator has a resistance of 0.75 ohm per phase. Estimate by zero power factor method the regulation for a load of 500 A at power factor (a) unity, (b) 0.9 leading and (c) 0.71 lagging, form the open circuit and full load, zero power factor curves:
Field current, A Open circuit voltage, V ZPF curve, V
32 3100 0
50 4900 1850
75 6600 4250
100 7500 5800
140 8300 7000
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