A single-phase transformer uses a single-phase alternating current. It has two lines of alternating current (AC) power.Below are a few common types:

In many industries, including health care, manufacturing, electrical contracting, higher education and corrections, reliable, high-quality transformers are essential for keeping operations running efficiently. Large facilities and industrial processes require substantial amounts of power, and they need dependable transformers to convert the energy coming from the power plant into a form they can use for their equipment and building utilities.The last step is to convert the figure in kilowatts to kilovolt-amperes. When you do that, you’ll need to divide by 0.8, which represents the typical power factor of a load. In the example above, you’d divide 7.5 by 0.8 to get 9.375 kVA.

So you’ll multiply your kVA rating by 1,000 and then divide by the amperage. If your transformer has a kVA rating of 75 and your amperage is 312.5, you’ll plug those numbers into the equation — 75 * 1,000 / 312.5 = 240 volts. How to Determine Secondary Voltage Remember that every transformer has a primary and secondary side. In many cases, you’ll want to calculate the primary voltage, which is the voltage the transformer receives from a power source. The kVA unit represents kilovolt-amperes, or 1,000 volt-amperes. A transformer with a 1.0 kVA rating is the same as a transformer with a 1,000 VA rating and can handle 100 volts at 10 amps of current. To determine your kVA size, you’ll need to make a series of calculations based on your electrical schematics.When you’re figuring out kVA size, it’s helpful to have the terminology and abbreviations straight before you begin. You’ll sometimes see transformers, especially smaller ones, sized in units of VA. VA stands for volt-amperes. A transformer with a 100 VA rating, for instance, can handle 100 volts at one ampere(amp) of current. Alternatively, you may have the kVA of your transformer and want to calculate the necessary voltage. In that case, you can adjust the equation we used above. Since you know kVA = V * l / 1,000, we can solve for V to get V = kVA * 1,000 / l.

There are a few different formulas which can be used to determine the size of a transformer. A useful formula is presented below. The primary and secondary circuits coil around the magnetic part of the transformer. A couple of different factors determine the secondary voltage — the number of turns in the coils and the voltage and current of the primary circuit.

Specification

Once you’ve located or calculated these two figures, you can use them to figure out the load’s power requirements in kilowatts. To do that, you’ll need to multiply the required input voltage (V) by the required current load in amperes (l) and then divide that number by 1,000:

A malfunctioning or broken-down transformer can lead to costly delays and make your business less profitable. Keep your operations running efficiently by staying on top of transformer repairs or getting a custom new system from ELSCO Transformers. Our essential staff members have over two decades of experience in the industry, and we parlay that extensive experience, knowledge and expertise into giving you reliable units that will run dependably and perform well for years. Additional Standards/Certificates:Low Voltage Direct. (72/73/EEC), EMC Direct. (89/336/EEC), Machinery Direct. (89/392/EEC). Generally to BSEN 61558 In the example above, we divided by 0.8 to increase the kVA of the transformer slightly. Why did we do that? Starting a device generally requires more current than running it. To account for this additional current requirement, it’s often helpful to put a start factor into your calculations. A good rule of thumb is to multiply the voltage by the amperage and then multiply by an additional start factor of 125%. Dividing by 0.8, of course, is the same thing as multiplying by 1.25.

Portable Transformer 3.3kva 110v 17kg

Let’s say you have a transformer with 300 turns in its primary coil and 150 turns in its secondary coil. You also know that the voltage drop through the first coil is 10 volts. Plugging these numbers into the equation given above yields 300/150 = 10/t 2, so you know t 2, the voltage drop through the secondary coil, is 5 volts. How to Determine Primary Voltage