does not the circulating current in a transformer affect the flux distribution in the transformer core

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why ceiling fan give hising sound

2 Answers  

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why magnetising curve not start with zero voltage?

0 Answers   TATA,

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We are planning to synchronized DG's with our captive plant in the event of black start of plant, but before sync we checked voltage of DG with our plant voltage and it varies from 5 V to 450 V. So in this condition how we can sync DG with plant ?

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Is a 300w induction motor used in a food processor as powerful as a 1000w DC motor.

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what is per unit impedance?

3 Answers  

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what happens when series resonance occurs?

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What is the significance of %Z in case of transformer?

1 Answers  

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A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?

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what is the contact resistance of vacume circuit breaker??

1 Answers  

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Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.

0 Answers   HAL,

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what are check points to be checked while charging switchyard?(CT,PT,BREAKER,POWER TRANSFORMER)

1 Answers  

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