2300 V, 740 kW 3 phase 60 Hz, 16 single pole number, in an asynchronous motor with winding rotor, the stator and rotor windings are star connected. Equivalent circuit parameters: R1 = 0.0725 ohm / phase R2 = 0.0252 ohm / phase (is the resistance measured with an ohmmeter!) B = 2.025 Stator / rotor windings ratio of number of turns per phase Xm = 17.7 ohm / phase X1 = 0.625 ohm / phase X2 = 0.625 ohm / phase Rfe = 200 ohm / phase Since Rfe resistance also includes mechanical losses; a) Calculate the shaft moment for slip S = 0.019? b) Spindle power c) Efficiency d) Power factor
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.
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2300 V, 740 kW 3 phase 60 Hz, 16 single pole number, in an asynchronous motor with winding rotor, the stator and rotor windings are star connected. Equivalent circuit parameters:
R1 = 0.0725 ohm / phase
R2 = 0.0252 ohm / phase (is the resistance measured with an ohmmeter!)
B = 2.025 Stator / rotor windings ratio of number of turns per phase
Xm = 17.7 ohm / phase
X1 = 0.625 ohm / phase
X2 = 0.625 ohm / phase
Rfe = 200 ohm / phase
Since Rfe resistance also includes
- a) Calculate the shaft moment for slip S = 0.019?
- b) Spindle power
- c) Efficiency
- d) Power factor
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