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How many amps can you draw from a 25kva 3 phase step down transformer?
Wiki User
∙ 11y ago
For practical purposes, Transformers do not lose power during transformation. Thus, if you have the VA of the transformer, you can simply divide the VA by the voltage to get a rough idea of maximum current.
In a real application, the maximum amperage will be dependent on the phase angle of the transformer.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoImpossible. 25KVA is a power measurement. To convert to amps, you must have voltage.
In the case of three phase:
P = Voltage * current * sqrt(3) (assuming voltage is line to line)
The current in the equation is phase current, thus the current calculated above will flow in all three branches, and will be 120 degrees out of phase with the other phases.
Wiki User
∙ 14y agoAmps and kVA are two different things. In fact the "A" in "kVA" stands for Amps. The question is about the same as asking "How many meters is a liter?"
Wiki User
∙ 10y agoEach line is 220 v to neutral so with 25/3 kVA from each line the current is 37.9 amps which is 25000/(3x220). Therefore each line can supply 37.9 amps.
Wiki User
∙ 11y agoTo answer this question the voltage has to be stated. I = W/E. Amps = Watts (or VA)/Volts.
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Can you convert three phase 480 volts to single phase 110 volts?
If you have a 220v three phase delta system, the phase-to-phase voltage is 220v single phase; hence, no conversion is necessary. Don't worry about 220-240v rating, the voltage rating is nominal. Your 110v single phase has actually already be taken from a center-tapped transformer on your three phase system.
On a stup down transformer what does the xo symbol mean?
On a step down transformer XO symbol denotes the secondary split phase grounding point. This is also where the neutral of the three wire secondary is connected. The transformer connection is known as a single phase - three wire - with one secondary winding.
What will happen if we use current transformer of different rating for each phase in three phase supply?
A current transformer has to have the same ratio as the meter that it drives. Full scale deflection on the meter is 5 amps which equals the maximum allowed current on the phase that it is reading. A different ratio on the CT to meter would show an erroneous reading on the meter depending on the ratio of the connected CT. To keep costs down the meter is common to all three phases and is read by connecting the meter to the phase CT through a three position switch.
Can 3 single phase transformers can replace 1 three phase transformer?
Yes, you can use three single phase transformers on three phase applications and interconnect them to serve as a single transformer or you could use one single phase transformer fed from two of the three lines in a step down application.
What is the line side of the 3 phase transformer?
The primary line side of a 3 phase transformer should be marked H1, H2, H3. The line side is the incoming voltage that you want to step up or step down or isolate.
Can you convert three phase 480 volts to single phase 110 volts?
If you have a 220v three phase delta system, the phase-to-phase voltage is 220v single phase; hence, no conversion is necessary. Don't worry about 220-240v rating, the voltage rating is nominal. Your 110v single phase has actually already be taken from a center-tapped transformer on your three phase system.
How many output amps is a 45 kva transformer?
There is not enough information provided to answer. KVA is short for "Kilo Volt Amperes". That is, thousands of Volt Amps. In order to determine how many Amperes are flowing, you must know at what voltage it is operating. Amperes = 45,000 ÷ volts Bill Slugg
Can you put a transformer on a 32 amp generate to drop the amps to 16 amps?
The purpose of a transformer is to transform one voltage to another voltage. This can be in the configuration of stepping up the voltage or stepping down the voltage . The load is what establishes what the current from the transformer is going to be.
What happens to the transformer ratings when you use a three phase step down as a step up transformer?
Nothing. The same rating is applicable.
How do you figure out maximum current of a 240V transformer circuit?
Your best bet is to go to Acme Transformer on the web and once you are on their web page select how do I rate a transformer, they have everything single phase 3 phase step up step down.
How are the amperes for transformer calculated?
Find the wire from the secondary of the transformer. If it's a step-down transformer the thicker wire is the secondary. Measure its diameter in inches and calculate its cross-section area in square inches. The current rating for transformer wire is 1000 amps per square inch, or 1.55 amps per square mm.
On a stup down transformer what does the xo symbol mean?
On a step down transformer XO symbol denotes the secondary split phase grounding point. This is also where the neutral of the three wire secondary is connected. The transformer connection is known as a single phase - three wire - with one secondary winding.
What are operation of single-phase transformer?
To stept up or step down the voltage of transmisson of electricity.
How can you step down a 15kv transformer single phase to 220v?
A transformer steps the voltage of an electrical power supply up or down. The transformer must be correctly designed for the voltage and current levels that it is intended for. Only ac can be used with a transformer, which is designed to work at a particular frequency.
What will happen if we use current transformer of different rating for each phase in three phase supply?
A current transformer has to have the same ratio as the meter that it drives. Full scale deflection on the meter is 5 amps which equals the maximum allowed current on the phase that it is reading. A different ratio on the CT to meter would show an erroneous reading on the meter depending on the ratio of the connected CT. To keep costs down the meter is common to all three phases and is read by connecting the meter to the phase CT through a three position switch.
Can 3 single phase transformers can replace 1 three phase transformer?
Yes, you can use three single phase transformers on three phase applications and interconnect them to serve as a single transformer or you could use one single phase transformer fed from two of the three lines in a step down application.
How can i calculate amperes for transformers?
Find the wire from the secondary of the transformer. If it's a step-down transformer the thicker wire is the secondary. Measure its diameter in inches and calculate its cross-section area in square inches. The current rating for transformer wire is 1000 amps per square inch, or 1.55 amps per square mm.
