Answer / deepak24

Hysteresis loss is a kind of iron loss=K*f*phi^1.2
where k=hysteresis constant
f= frequency of supply
phi= maximum flux density in core material

when magnetic material is subjected to magnetic field it is magnetized again if we remove the magnetic field the magnetization of material does not become to zero it is because of some magnetic domain remains aligned in the
direction of magnetic field.
so the additional energy is required to remove that
magnetization and dissipate as heat which is called as
hysteresis loss

why dc source used for HV breakers and Relays operation?

2 Answers   Cethar,

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Can we inject more current in ct primary paralleling 2 loading transformers/Injection kit at a time?let ct ratio be (5000/1A)(per kit rating 2000A range),i need to inject 5000A,if this cant b done means wat is d optional?

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what is interpose? where it is used and why it is used?

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Why the generator rating in kva

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HT/LT PANEL TEST?ALL TEST

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what happened when we supply a dc current in dc motor?? can it worked properly?

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what is the ckt diagram of a tubelight and is it the simplest ckt of electrical engineering and also the component?

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why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

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How much difference can there be between HT & LT KWH unit consumption at the same load?

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What are the different methods for calculating Short Circuit Curren?

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Electricty is generated at around 16kV, then step up to 220kV for transmission then steped down to power transformers then DTs and then through the LT n/w it reaches the consumer end. At the consumer end 230V supply is required. So, why is electricity not generated directly at 230V and transmitted?

4 Answers  

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