If a 75 kVA transformer is at 6% overload, what is the load on this transformer?

To determine the load on a transformer when it is at a certain percentage of overload, you first need to understand what a 6% overload means in practical terms. A 75 kVA transformer has a rated capacity of 75 kVA, which represents its maximum load capacity under normal operating conditions.

When the transformer is at a 6% overload, you calculate the load by taking 6% of the transformer's rated capacity and adding that amount to the rated capacity.

Here’s how the calculation works step-by-step:

1. Calculate 6% of the transformer’s rated capacity:

• 6% of 75 kVA = 0.06 * 75 = 4.5 kVA

2. Add this overload to the rated capacity:

• Load on the transformer = Rated capacity + Overload = 75 kVA + 4.5 kVA = 79.5 kVA

Therefore, when the transformer is at a 6% overload, the total load it is carrying is 79.5 kVA. This is why the correct choice is 79.5 kVA.