0
What is the formula to calculate magnetizing current on a transformer?
Wiki User
∙ 10y ago
Measure the primary inductance with the secondary open. Then use 6.28FL (F= frequency, L=henries) to find the reactance in ohms (unless it's a tiny transformer the dc resistance can be ignored). Once that's found use ohm's law I=V/R. If you don't have an LCR meter simply measuring no-load current will also work. If you have no meters you're in for alot of guess work as you need to know the permeability of the core material at the particular flux density/voltage it normally runs at.
Wiki User
∙ 10y ago
Wiki User
∙ 14y agoFrom N*I=H*l
I=(H*l)/N
where I is excitation current, H is magnetic field intensity, l is the length of magnetic core (mean), and N is the number of turns.
Add your answer:
Earn +20 pts
What is the current in 1KVA Transformer?
Tis question is incompleet.1000 va =1 kva.This is the power capacity of transformer. A transformer having 2 currents Primary current and secondary current . for that we required both voltage. Simply we can calculate by a formula Voltage x Current x 0.8(power factor)=1000.
How can calculate amps for 12v 50w halogen lamp?
The formula for current is Amps = Watts/Volts. The lamp itself would draw 4.16 amps. Since the voltage of the lamp is 12 volts there is a internal transformer involved in the fixture itself. It doesn't matter what the input (primary) voltage to the transformer is, so long as it meets the manufacturer's specification as to the proper voltage to operate the fixture.
How can calculate amps for 12V 50W halogen lamp in 230V input?
It would be pretty much undefined, since the filament of the halogen bulb would fail immediately then there would be an open circuit with no current draw. <<>> The formula for current is Amps = Watts/Volts. The lamp itself would draw 4.16 amps. Since the voltage of the lamp is 12 volts there is a internal transformer involved in the fixture itself. It doesn't matter what the input (primary) voltage to the transformer is, so long as it meets the manufacturer's specification as to the proper voltage to operate the fixture.
What is the formula to calculate secondary current?
The secondary current is calculated by dividing the secondary current by the impedance of the load. This value shouldn't exceed the secondary-winding's rated current except for short periods of time.
What is the Formula to calculate KVA?
(volts x amps)/1000AnswerThe 'volt ampere' (V.A) is the unit of measurement for apparent power of a load, and is the product of the supply voltage and the load current. To convert volt amperes into kilovolt amperes, divide by 1000.
What is the current in 1KVA Transformer?
Tis question is incompleet.1000 va =1 kva.This is the power capacity of transformer. A transformer having 2 currents Primary current and secondary current . for that we required both voltage. Simply we can calculate by a formula Voltage x Current x 0.8(power factor)=1000.
How do you calculate primary curuent?
Current is calculated on the load. If your question on transformer primary current, then use the formula N1I1=N2I2, where N1 and N2 are primary and secondary coil turns and I1 and I2 are current in respective coils. This is very basic simple formula. You have reframe your question more specifically.
What formula calculates the current drawn by the transformer for mains electricity?
p=r*i
Does the formula used to calculate the turns ratio uses the phase voltages and phase current?
For a transformer, the turns ratio always applies between its primary and secondary windings. So the turns ratio for a three-phase transformer is the ratio of primary to secondary phase voltages, not between line voltages.
What is formula for calculate maximum current?
volts divided by resistance equals maximum amperage (current)
What is the formula to calculate Conduction current in a coaxial cable?
Jc=sigma.E
How do you calculate current?
to fine I (current) when you have R (resistance) and V (voltage) you use the formula: I = V / R
What formula would be used to convert at current transformer rating at 60Hz to 25Hz?
I don't understand your question. Are you asking how to convert from 60hz to 25hz using a transformer? That cannot be done. Frequency in = frequency out.
How can calculate amps for 12v 50w halogen lamp?
The formula for current is Amps = Watts/Volts. The lamp itself would draw 4.16 amps. Since the voltage of the lamp is 12 volts there is a internal transformer involved in the fixture itself. It doesn't matter what the input (primary) voltage to the transformer is, so long as it meets the manufacturer's specification as to the proper voltage to operate the fixture.
What is the formula for gain in a power amplifier that has a step down transformer?
A: there is no formula the gain of the amp is just reduced by the transformer turn ratio minus efficiency or loss. the transformer is for isolation and impedance matching
How do you calculate the current flowing through a heater?
The formula you are looking for is I = W/E. Amps = Watts/Volts.
How many amps can a 480 to 120 vac 3KVA transformer handle?
If the transformer is three phase the calculation is I = 30,000 / 1.73 E. If the transformer is single phase the calculation is I = 30,000 / E. (Where I = current and E = secondary voltage) It is important to note the voltage in the first formula is line to line (typically how it is specified in three phase power systems), and the second formula it is line to neutral.
