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How do you find the primary power of a transformer?
Use the same formula for all transformers. If for some reason you need a larger transformer to operate appliances, you still divide the wattage by the voltage to find the current. For a 120-volt primary, 2000-watt transformer, divide 2000 by 120 for the current (2000 Watts /120 volts =16.67 amps).
What is real power formula?
Real power (P), also known as true or active power, performs the “real work” within an electrical circuit. Then real power, (P) in an AC circuit is the same as power, P in a DC circuit. So just like DC circuits, it is always calculated as I2*R, where R is the total resistive component of the circuit.
What is meant by power factor?
Power factor (PF) is the ratio of working power, measured in kilowatts (kW), to apparent power, measured in kilovolt amperes (kVA). It is found by multiplying (kVA = V x A). The result is expressed as kVA units. PF expresses the ratio of true power used in a circuit to the apparent power delivered to the circuit.
How is the impedance of a power transformer measured?
The magnitude of the series impedance referred to the primary side of the transformer is: The short-circuit test:. Fairly low input voltage is applied to the primary side of the transformer. This voltage is adjusted until the current in the secondary winding equals to its rated value.
How to calculate the raminaing of a transformer?
Enter the voltage or current or VA rating of the transformer to calculate the raminaing one. Transformers are static equipment which is used to convert the voltage or current to the different levels. It is a heart of power systems. The total deliverable apparent power is the rating of the transformer.
How is the apparent power of a transformer rated?
The total deliverable apparent power is the rating of the transformer. The unit of apparent power is VA (Volt-Amp). Hence the transformer is rated by the VA only. Sometimes the transformer can be rated by kVA (kilo Volt-Amps) or MVA (Mega Volt-Amp).
How to calculate the MVA of a transformer?
MVA (Mega Volt-Amp) rating of the transformer S (MVA) is equal to the product of primary current I (Primary) in amps and Primary Voltage V (primary) in volts divided by 1000000. Learn More: Why Tertiary Winding is used in transformer? S (MVA) = V (primary) * I (Primary) / 1000000 = V (secondary) * I (secondary) / 1000000