What is the power unit of Transformer and why ?

What is the power unit of Transformer and why ?
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1 Answer

Answer :

The unit of power of the transformer is KVA . That is kilowatt volt ampere. The reason is that we know that the unit of power of any machine is determined based on its #loss . Exactly the same thing here. The losses of the transformer are 1. Iron loss / core loss 2. Copper loss Well , now iron loss is a matter of voltage , and copper loss is the loss of current. Then the total volt ampere stood. This is why the unit of power of the transformer is written in kilowatt volt amperes or kVA .
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Related questions

What is meant by transformer ratio ?

Description : What is meant by transformer ratio ?

Last Answer : The relationship between the voltage, the number of punches and the current in the primary and secondary coils of a transformer is called the transformer ratio of the transformer. It can be ... Current Notice the image below. Hopefully it will be helpful to understand the transformation ratio.

How do I step down a step up transformer ?

Description : How do I step down a step up transformer ?

Last Answer : If we want to step up a transformer, we need to punch more of the secondary coil than the number of punches of the primary coil of the transformer. And in order to determine the number of these ... already been written on our electronics site, I did not repeat it. Read the article from this link.

What is a step up transformer ?

Description : What is a step up transformer ?

Last Answer : A step-up transformer is a transformer which gives high voltage in the secondary if voltage is given in the primary. The transformers that we use in UPS , IPS , inverter etc. are step up nature transformers.

Why insulation or thin coating is used in the core of transformer ?

Description : Why insulation or thin coating is used in the core of transformer ?

Last Answer : In the core of a small transformer there are actually many ( E) and ( I) and different sized steel sheets of large size transformers. In fact, one type of varnish / lamination paint is applied on ... was a lot of voltage and drops. So insulation is used in the transformer to prevent this loss.

What is Ideal Transformer ?

Description : What is Ideal Transformer ?

Last Answer : In fact, the ideal form of any machine or object or its norm refers to a condition where the amount of loss is 0%. This standard is mainly used during laboratory research. This means that the output ... Because when that device is turned into reality, a lot of losses come and block the way forward.

What is the efficiency percentage of a transformer ?

Description : What is the efficiency percentage of a transformer ?

Last Answer : No machine has ever been discovered in the world with 100% efficiency or output. The only transformer is a device whose output power is about 90% to 99% of the input. This means that the power loss ... to the input and output of a device by which the efficiency of the device can be measured.

Transformer is based on which formula ?

Description : Transformer is based on which formula ?

Last Answer : It is based on Faraday's formula. Now the question may arise that Mr. Faraday said that in order to occupy a magnetic field with another coil, one of them must move. Tachara flux will not be obsessed ... DC. So it does not have to be shaken separately. Because its waves tend to be self-evident.

What is a Transformer Symbol ?

Description : What is a Transformer Symbol ?

Last Answer : In Electrical or Electronic Circuit, we often use this symbol to identify the transformer - the correct way to draw and symbolize different types of transformers.

What is primary leakage flux in transformer ?

Description : What is primary leakage flux in transformer ?

Last Answer : The leakage flux caused by the magnetomotive force ( mmf) due to the primary ampere turn is called primary leakage flux when it produces a leakage path from the primary winding. This was the second ... answer regarding Transformer. I will appear with the 3rd episode in the future. So stay with us.

Why is the side-side shorted during the short circuit test in the transformer ?

Description : Why is the side-side shorted during the short circuit test in the transformer ?

Last Answer : During this test, any side of the transformer can be shorted, but for the following reasons, the side-side is shorted and 1. Lay-range instruments have the advantage of being connected to the high side ... both windings below 3% of the rated output , so it is convenient to measure on the high side.

What information is available from the short circuit test of the transformer ?

Description : What information is available from the short circuit test of the transformer ?

Last Answer : The following information is available from the short circuit test 1. Equivalent resistance ( R.) . 2. Equivalent Reactance ( X.) . 3. Equivalent impedance ( Z.) 4. Copper loss 5. Skills and Regulation

What is the purpose of open circuit test in transformer ?

Description : What is the purpose of open circuit test in transformer ?

Last Answer : The following information is obtained from this test and the product is tested in open circuit. Core Loss (Eddy Current Loss and Hysteresis Loss) No-Laid Current Magnetizing Current ( I) Working Current ( I) ... ( R0) Core Loss Reactance ( X) No-Laid Power Factor ( cose,) Transformation Ratio ( a)

What is Open Circuit Test of Transformer ?

Description : What is Open Circuit Test of Transformer ?

Last Answer : Answer : The test is performed at the rated normal full voltage and frequency of the transformer by placing the required number of measuring instruments on either side of the transformer (usually high voltage-side). It is called open circuit test.

What is the reason why wattmeter indicates only copper loss during transformer short circuit test ?

Description : What is the reason why wattmeter indicates only copper loss during transformer short circuit test ?

Last Answer : Answer : The voltage applied in this test is limited to 5% to 10% of the rated voltage . As a result, much less mutual flux ( Φm) is produced in the core than normal mutual flux. Since ... Φm² , the core loss is practically zero. Thus the whole of the wattmeter reading is considered copper loss.

What is the no-load current of transformer ?

Description : What is the no-load current of transformer ?

Last Answer : The small amount of current flowing in the primary winding in the no-load condition of the transformer is called no-load current.

On what does the core loss of a transformer depend ?

Description : On what does the core loss of a transformer depend ?

Last Answer : The core loss of the transformer depends on the voltage applied to the primary.

What is EMF Equation in Transformer ?

Description : What is EMF Equation in Transformer ?

Last Answer : Answer : When AC voltage is applied to the primary of the transformer, current is generated. Which produces variable flux in the primary and goes to the secondary through the core. This variable flux expresses the emf in the primary and secondary of the transformer, which is called the emf equation.

What is the function of transformer bushing ?

Description : What is the function of transformer bushing ?

Last Answer : Answer : The transformer is brought out of the tank by bushing at the winding terminals. These bushings are made of very fine porcelain. These are attached to the lid of the tank with a gasket ... the transformer winding. Their number , size and method of connection depend on the amount of voltage.

Why Vent Pipe is used in transformer ?

Description : Why Vent Pipe is used in transformer ?

Last Answer : There is a vent pipe at the top of the transformer. The mouth of this pipe is closed with glass. The gas created due to overheating of the transformer , the glass bursts under the pressure of the gas and the gas escapes.

What is a Shell Type Transformer ?

Description : What is a Shell Type Transformer ?

Last Answer : The core structure of this type of transformer is also rectangular , but it has three arms. Its two arms are empty and only winding is done on the middle arm. This type of core is called shell type.

What is a Core Type Transformer ?

Description : What is a Core Type Transformer ?

Last Answer : Answer : The core of this type of transformer is made up of a rectangular 'L' laminated steel sheet. It encloses most of the core space in the coils. Only one magnetic socket is made in the ... voltage windings are applied to the two opposite arms of such a core. It is called Core Type Transformer.

What is the principle of transformer ?

Description : What is the principle of transformer ?

Last Answer : The transformer is connected by mutual induction of two circuits or coils under the same magnetic flux. The two inductive coils are magnetically connected to a uniform laminated core without electrical connection ... is completed by connecting the lead to the second coil, current will flow in it.

How to recognize high-side and low-side of transformer without test ?

Description : How to recognize high-side and low-side of transformer without test ?

Last Answer : A typical type of transformer has two coils. One is called high voltage ( HV) winding and the other is called low voltage ( LV) winding. High quality delta is used in HV winding. As a result , ... without test, the shape of the bushing of the transformer can be identified as high side or low side.

Why the frequency of both coils of transformer is the same ?

Description : Why the frequency of both coils of transformer is the same ?

Last Answer : Answer : Using alternating current (AC) in one of the coils of the transformer to produce magnetic field creates another variable magnetic force line , which intersects the surrounding coil. As a ... of the transformer remains the same as voltage is generated in the secondary by the same supply.

What is Transformer Action ?

Description : What is Transformer Action ?

Last Answer : The primary and secondary coils of the transformer are connected by the same mutual flux. Therefore, when AC is supplied to the primary coil, the transfer of electricity from the primary ... the principle of electromagnetic induction . This process of transfer of power is called transformer action.

What is the mutual flux of transformer ?

Description : What is the mutual flux of transformer ?

Last Answer : Answer : Connecting AC , CERS to any one of the coils of the transformer creates a variable magnetic force line in the coil , which intersects the adjacent coil. As a result, voltage is ... , this induced voltage is the transformer voltage and this variable magnetic force line is called mutual flux.

What is Dry Type Transformer ?

Description : What is Dry Type Transformer ?

Last Answer : This type of transformer uses air instead of oil for cooling and insulation, so it is called dry type transformer.

What is the value of voltage and current of transformer ?

Description : What is the value of voltage and current of transformer ?

Last Answer : The value of voltage and current of the transformer depends on the number of patches of wires in the transformer.

Why Transformer is more efficient ?

Description : Why Transformer is more efficient ?

Last Answer : As there is no rotating part of the transformer, there is no loss of power due to friction and wind obstruction , which happens in other parts.

What is a step down transformer ?

Description : What is a step down transformer ?

Last Answer : If you get low voltage with high voltage supply, it is called step down transformer.

What is the function of oil in transformer ?

Description : What is the function of oil in transformer ?

Last Answer : The job of transformer oil is to cool the transformer. So that the transformer does not get hot and burn.

What is the unit of electric power ?

Description : What is the unit of electric power ?

Last Answer : Unit W of electric power

What is the unit of illumination ?

Description : What is the unit of illumination ?

Last Answer : : The amount of light radius found per unit area of a place is called illumination of that place. So the unit of illumination is lumen / sqft or lumen / sqm. When one lumen of light falls on an area of one square foot, it is called one lumen / square foot or 1 foot candle illumination.

How many watts equals one unit ?

Description : How many watts equals one unit ?

Last Answer : 1000 watts = 1 unit.

What is the practical unit of current ?

Description : What is the practical unit of current ?

Last Answer : The practical unit of current is ampere ( Amp).

What is the international unit of current measurement ?

Description : What is the international unit of current measurement ?

Last Answer : The international unit of current measurement is Ampere , which is abbreviated as 'A' .

What is the best economic power factor ?

Description : What is the best economic power factor ?

Last Answer : This means that raising the power factor results in maximum annual savings , in which case the value of the power factor is called the best saving power factor.

What happens if the value of power factor is low ?

Description : What happens if the value of power factor is low ?

Last Answer : ( a) Current flows more , ( b) Copper loss increases , ( c) Heat increases , ( d) Output decreases , ( e) Voltage drop increases , ( f) Different electrical machinery heats up quickly. , ( G) The life span of various electrical machinery and appliances is reduced.

What are the components of power transmission line ?

Description : What are the components of power transmission line ?

Last Answer : ( a) Power Plant , ( b) Conductor Wire , ( c) Transformer , ( d) Line Insulator , ( e) Line Support , ( f) Power Substation , ( g) Circuit Breaker , ( h) Relay , ( I) Isolator , ( j) Lighting Arrester

What is the Leading Power Factor ?

Description : What is the Leading Power Factor ?

Last Answer : When the capacitive load of an AC circuit exceeds the inductive load , the pf of the circuit is called the leading pf . Thank you!

What is Lagging Power Factor ?

Description : What is Lagging Power Factor ?

Last Answer : When the inductive load of an AC circuit exceeds the capacitive load , the pf of the circuit is called lagging pf .

Write the maximum power transfer theorem ?

Description : Write the maximum power transfer theorem ?

Last Answer : The maximum power transfer from a DC source to a resistive load will occur only when the internal resistance is equal to the series resistance connected to the load resistance source .

What is Unity Power Factor ?

Description : What is Unity Power Factor ?

Last Answer : There is no angular gap between current and voltage in pure resistance. That is, the phase angle of current and voltage is φ = 0, the power factor of that circuit is one or unit. This is called Unity Power Factor.

What is the leading power factor ?

Description : What is the leading power factor ?

Last Answer : When the amount of capacitive load is more than the inductive load in a circuit then the power factor of that circuit is called leading power factor.

What is lagging power factor ?

Description : What is lagging power factor ?

Last Answer : When the amount of inductive load is greater than the capacitive load in a circuit then the power factor of that circuit is called lagging power factor.

What is the power factor in pure resistive , capacitive , inductive load ?

Description : What is the power factor in pure resistive , capacitive , inductive load ?

Last Answer : Answer : Power factor cosΦ = 1 in pure resistive load, cosΦ = 0 in capacitive load , cosΦ = 0 in inductive load .

What is Reactive Power ?

Description : What is Reactive Power ?

Last Answer : The product of the voltage of the AC circuit and the product of the reactive current or the vertical component of the current is called reactive power.

How many types of power factor ?

Description : How many types of power factor ?

Last Answer : Three types , namely , 1) lagging power factor , 2) leading power factor , 3) unity power

What is the effect of resistance and reactance on power factor ?

Description : What is the effect of resistance and reactance on power factor ?

Last Answer : Power factor depends on resistance and reactance. As the resistance of the circuit increases, the phase angle between the current and the voltage decreases, resulting in an increase in the power factor ... current and the voltage increases, resulting in a decrease in the power factor of the circuit.

Active Power Depends on What Matters. ?

Description : Active Power Depends on What Matters. ?

Last Answer : Active power : Depending on current , voltage and power factor.