How to Choose Transformer Capacity

The capacity of the transformer refers to the maximum load power that the transformer can withstand, measured in kilovolt amperes (KVA). The selection of transformer capacity is based on the demand of the load, and generally requires consideration of the following:

1. Load Power

The capacity of the transformer needs to meet the requirements of the load, and the larger the load power, the larger the required transformer capacity.

2. Load Nature

The requirements for the transformer capacity are different for different types of loads. For example, the requirements for the transformer capacity are different for the loads of electric motors, lighting, etc.

3. Load Variation

If there is a large load variation, it is necessary to choose a transformer with a larger capacity to ensure its normal operation.

4. System Voltage

The transformer capacity also needs to be determined based on the system voltage, and the higher the voltage, the larger the required transformer capacity.

5. Power Stability

If the power supply is unstable, a transformer with a larger capacity needs to be selected to ensure the normal power supply of the load.

6. Operating Environment

It is also necessary to consider the operating environment, such as the temperature and the humidity would have a certain impact on the capacity of the transformer.

In the process of selecting transformer capacity, the following should be noted:

1. The future load growth should be considered to reserve a certain amount of capacity.

2. If the load is not constant, it should be calculated based on the specific operating conditions.

3. The temperature and capacity limits of the transformer should be considered to avoid selecting transformer that are too small or too large.

4. When selecting a transformer, not only the capacity should be considered, but also the other factors such as its quality, maintenance, and upkeep should be considered.

5. The selected transformer should comply with national and industry standards, and the outdated transformers should be avoided to use.

It is very important to determine the capacity of the transformer. Choosing the appropriate capacity can ensure the normal operation of the transformer, while also reducing energy waste and economic losses.