Transformer Amperage Calculator:
Enter the values of power, P(W), and voltage, V(V), to determine the value of transformer amperage, I(A).
Transformer Amperage:
Transformer amperage refers to the current (measured in amperes or amps) that flows through a transformer’s primary or secondary winding when a specific amount of electrical power (watts) is delivered at a specific voltage (volts).
It indicates how much current the transformer must handle under a given load condition.
The amperage is important for choosing the appropriate wire size, breaker rating, and transformer capacity to avoid overheating or damage.Current in a transformer is determined using the basic electrical formula: Current (I) = Power (P) / Voltage (V).
This relationship helps engineers ensure that transformers operate within safe and efficient limits.Power is typically expressed in watts (W) or kilowatts (kW), and voltage in volts (V).
If the power is in kilowatts, it must be converted to watts by multiplying by 1,000 before applying the formula.The calculation applies to both single-phase and three-phase systems, although the formula differs slightly for each.
Higher currents require thicker wires and larger circuit protection devices.Transformer amperage is a key part of transformer sizing and selection in electrical installations.Accurate amperage calculations lead to improved efficiency and longer transformer lifespan.
Transformer Amperage, I(A) in amperes equals power, P(W) in watts, divided by voltage, V(V) in volts.
Transformer Amperage, I(A)= P(W)/V(V)
I(A)= transformer amperage in amperes, A.
P(W)= power in Watts, W.
V(V)= voltage in volts, V.
Transformer Amperage Calculation:
A transformer supplies 4000 watts at 230 volts. Find the transformer amperage.
Given: P(W)= 4000W, V(V)= 230V.
Transformer Amperage, I(A)= P(W)/V(V)
I(A)= 4000 / 230
I(A)= 17.39A.
A transformer delivers 7200 watts of power with a current of 30 A. What is the voltage?
Given: P(W)= 7200W, I(A)= 30A.
Transformer Amperage, I(A)= P(W)/V(V)
V(V)= P(W)/ I(A)
V(V)= 7200 / 30
V(V)= 240V.