Someone the other day asked me how the transformer primary current could be calculated if the transformer was only partially loaded on the secondary with a purely resistive load?
So for instance lets say for example we had a 100KVA 3phase 480Vpri - 208V sec transformer but the secondary load was only 50kW purely resistive. How would we calculate the current on the primary? I know we simply couldn't reflect the 50kW over to the primary and solve for current since we need to account for the reactive current in the transformer. (Lets ignore internal transformer losses for now).
How would we account for the transformer magnetising current for calculating the primary current on the transformer for the given secondary load?
So for instance lets say for example we had a 100KVA 3phase 480Vpri - 208V sec transformer but the secondary load was only 50kW purely resistive. How would we calculate the current on the primary? I know we simply couldn't reflect the 50kW over to the primary and solve for current since we need to account for the reactive current in the transformer. (Lets ignore internal transformer losses for now).
How would we account for the transformer magnetising current for calculating the primary current on the transformer for the given secondary load?