Almost every industry, from basic manufacturing industries to critical healthcare facilities and testing laboratories, requires high-quality reliable transformers to keep their operations running safely and efficiently. Larger facilities require larger amounts of power, which means more dependable transformers to convert the energy coming from the power plant, into a form that can be used for the equipment.
But, in order to have the transformers do so effectively, businesses need to know how much power their particular transformers can give them. It is the transformer’s rating that provides this information. The rating, or size, is the transformer’s power level in kilovolt-amperes, denoted by kVA. You need to select a transformer with the correct kVA for your needs. If not, you may run the risk of damaging your valuable equipment. Seems difficult? But fortunately, it’s not as difficult as it sounds. In fact, sizing your transformer is relatively simple. You just need to use a simple straightforward formula to generate your kVA requirements, using the current and voltage of your electrical load. Let’s help you know how you can calculate the required kVA rating.
Calculating the kVA value
Transformers come in two basic ratings – volt-amperes (VA) and kilovolt-amperes (kVA). A transformer with a 100 VA rating can handle 100 volts at one ampere of current. Similarly, a transformer with a 1.0 kVA rating (1000 volt-amperes) can handle 100 volts at 10 amperes of current. To determine your appropriate kVA size, you need to make a few calculations, based on your electrical schematic.
There are two main measurements that you’ll need, that of the voltage (V) and of the current (I). Voltage is the electrical load that connects to the secondary winding, and current is the flow that the electrical load requires. Both these values can be determined simply by looking at the electrical schematic. Once these two values have been determined, you can then use them to figure out the load’s power requirements. To do that, you’ll need to multiple the voltage with the load, and then divide the number by 1000; hence, the formula being –
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