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What is the kw of 100kva transformer and how you calculate?
kw of 100kva=100*0.8 pf=80kw( if the power factor is 0.8)
What is the breakdown voltages of 100KVA transformer bushing and arcing horns?
The question isn't correct, you have to define the voltage level not the power rating.
What is ELSP?
An ELSP is a current limiting fuse used in series with the primary fuse of a transformer.
Why does the primary side of a step down transformer burn out and not the secondary of a 480V to 240V transformer?
Sounds like the wrong size fuse protection was used. The transformer should be protected to its kva capacity.
How many amps can a 100 KVA transformer carry?
A 100kVA transformer is rated for...100kVA. That is its' power rating, and it is based off the current that is flowing through the transformer (the I^2*R losses are the limiting factor). This can be 80kW and 60 kVARs, or 100kW and 0 kVARs, or 100kVARs, or anywhere inbetween.Another AnswerThe 'power' rating of a transformer is the product of its secondary voltage and its secondary current, expressed in volt amperes or multiples thereof. It's not expressed in watts, because to know the 'true power' of the transformer, the manufacturer will need to know the power factor of the load, and that could vary considerably. Incidentally, the symbol for kilovolt ampere is 'kV.A', not 'kVa'.
What position in the circuit is a fuse placed to protect a transformer?
In series to every phase winding of transformer.
What is the fuse rating for 5MVA transformer?
50 amp
Does the fuse on the primary side of a transformer protect the secondary side?
Yes, but it's usual to have fuses on both sides of the transformer.
Where is the built in thermal fuse located on a power supply transformer?
the INside
How do you convert 480v to 120v?
to derive 120 volts from 480 volts you have to use a transformer, based on your needs. If you needed 100 amps at 120 volt single phase you would need a 12kva transformer. This is just an example.
What can you do as preventative maintenance for a power pole transformer so that the mineral oil does not boil?
Lower the rating of the primary fuse feeding the transformer.
Why kva rating of transformer is always multiple of 11?
It's not - I have seen 50kVA, 100kVA,...15000kVA, 36000kV, 180000kVA to name a few examples. Near where I live, I don't believe there are more than a few transformers rated in multiples of 11 as you state.
