0
i will try my best to answer this quistion, but u must not mind if i make a mistake!
>>> the rating of an elctrical machine depend upon the loses in it. if, there are any losses in the machine due to power factor than the machine will b rated in KW and if there is no loss due to power factor than the machine is rated in KVA. so there are no losses in a transformer due to power factor so it is rated in KVA.
as the
KW= KVA* power factor
so,
kVA= KW/power factor
here, KVA=100
so,
KW= 100*power factor
u can derive from here that the load on a transformer depends upon the power factor. as the power is always less than unity so the load will be less than 100KW.
thankyou!
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Which fuse is used for 100kva transformer?
1o amper
Why no load current in transformer small?
No load current is energizing current. This is effectively "lost" power, power used in the transformer to energize the core. It, therefore, should be small!
How a transformer can be used as impedance matching?
If the line impedance is Z0 and the load is ZL then connect the load using a transformer with N turns ration. N=sqrt(Z0/ZL)
What is on load tap chenger?
A tap changer is used to vary the turns ration between the windings of a transformer to make minor changes to the secondary voltage. An on-load tap changer enables the turns ratio to be altered without disconnecting the transformer. An off-load tap changer requires the transformer to be temporarily diconnected. On-load tap changers are installed on the high-voltage side of the transformer, where the current is lower.
Why in no load test transformer is connected on low voltage side?
A no-load test is done with the normal supply connected in the way the transformer is intended to be used. It is also known as an open-circuit test to distinguish it from a short-circuit test, and its purpose is to measure the power loss in the iron core of the transformer and the no-load current drawn from the supply.
What would an off load transformer tap changer be used for?
to inreases or decreases n. of turns of a transformerAnswerAn 'off-load' tap changer is a tap-changing mechanism that can only be used when the transformer is disconnected, as opposed to an 'on-load' tap-changing mechanism that can operate when the transformer is energised and on load.Tap changing is performed to slightly change the turns ratio of a transformer in order to keep the secondary voltage within the statutory limits (e.g. in the UK, 230 V +10% -6%) should there be a substantial change in load.
What is the principle of transformer working Explain the working principle of transformer on no load?
Transformer is a static electrical device used to step up or step down the voltage with the help of primary and secondary windings.
What is inherent voltage regulation of an onload tap changer for power transformer?
depending on the amount of the load of transformer as well as the power factor of it, there is a transformer specific voltage drop at its terminals, due to the internal impedances. The on-load tap changer can / will be used to compensate this voltage drop or rise.
What is off load tap change?
Tap changer is a device that is used to change the secondary voltage on transformers. It is normally on the HV winding of the transformer. Off load tap changer is designed to change the taps only when the transformer is not charged, while on load tap changer is capable of changing the tap on load too.
Why transformer is used before conected any semiconductor device?
because it is necessary to provide an over load protection ,surge protection,etc....hence an transformer is used...( particularly isolated transformers)
What Device used to select amount of voltage in primary coil of step up transformer?
There is no selective device to determine the amount of voltage. A transformer is selected by the voltage available at the site for the primary and the load on the secondary side of the transformer.
Can a 500mA transformer be used to operate a circuit requiring 1amp12w?
No because that transformer can only supply a ½ amp so it would seriously overheat if a 1-amp load was connected to it.
