How to Choose a Transformer Based on Size and Selection?

How to Choose a Transformer Based on Size and Selection?

Transformer sizing is essential for efficient and dependable power distribution in buildings & companies. Here’s a basic guide to help you recognize the different steps involved in finding the proper transformer size:

Step- 1). Calculate the entire Connected Load

Step- 2). Add 10% Extra Load for Upcoming Expansion

Step- 3). Calculate the Maximum Demand Load

Step- 4). Convert Maximum Demand Load to kVA

Step- 5). Calculate Transformer Capacity

Step- 6). Choose the Transformer Size

1). Calculate the entire Connected Load

Sum up the entire electrical load of all equipment and devices inside the building or enterprise.

2). Add 10% Extra Load for Upcoming Expansion

It’s always apparent to prepare ahead. Add 10% to the overall load to accommodate for any future expansion and verify your transformer can manage it.

3). Calculate the Maximum Demand Load

Calculate the Maximum Demand Load by applying a Demand Factor to the altered total load. This aids in knowing the peak load that the transformer must sustain.

4). Convert Maximum Demand Load to kVA

The load is usually calculated in kW. To convert it to kVA, divide the Maximum Demand Load by the system’s Power Factor (0.8 or 0.9 for typical industrial settings.

5). Calculate Transformer Capacity

The needed transformer capacity may be calculated using the Maximum Demand (in kVA) and any derating factors, as well as the transformer’s efficiency.

6). Choose the Transformer Size

Finally, use the transformer selection chart to pick a transformer size that corresponds to the predicted capacity, guaranteeing maximum efficiency and lifetime.

By following these procedures, you can guarantee that the transformer you choose will fulfill your project’s present and future requirements while also delivering a stable power supply.

Transformer Calculator

Transformer KVA Calculator based on load