Defender 3kVA Portable Transformer 110V 3000W (E203010)

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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. When a piece of electrical equipment malfunctions, the transformer is often the culprit. In that case, you’ll probably need to replace your transformer, and when you do, you’ll need to select one with the correct kVA for your needs. If not, you run the risk of frying your valuable equipment. The calculation for a three-phase transformer kVA is a little different from the calculation for a single-phase kVA. Once you’ve multiplied your voltage and amperage, you’ll also need to multiply by a constant — 1.732, which is the square root of 3 truncated to three decimal places:

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. When sizing a transformer it is important to determine the application. Depending if the application is three phase or single phase, this will determine which formula to use. 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. The Current that passes through transformer windings will determine the Copper Losses, whereas Iron Losses, Core Losses or Insulation Losses depends on voltage. What rating do you requireThe 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. Before you can calculate the necessary kVA for your transformer, you’ll need to figure out your load voltage, which is the voltage required to operate the electrical load. To determine your load voltage, you can look at your electrical schematic. NOTE: If you need assistance with circuit protection devices such as fuses or breakers, or wire sizing, please consult a licensed electrical contractor or electrician in your area who will be familiar with state and local codes.

NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 to get the minimum KVA rating needed. All values should be reviewed and confirmed by an electrician or electrical engineer. In the example above, we divided by 0.8 to increase the kVA of the transformer slightly. Why did we do that? Additional Standards/Certificates:Low Voltage Direct. (72/73/EEC), EMC Direct. (89/336/EEC), Machinery Direct. (89/392/EEC). Generally to BSEN 61558 The equation for three-phase transformers, which we’ll discuss in more detail below, is also slightly different. When you’re doing calculations with three-phase transformers, you’ll need to include a constant to make sure your work comes out correctly. Standard Transformer Sizes R Baker (Electrical) Ltd have an in-house engineering team readily available to work with you. From design through to installation our team are here to help. We aim to produce the most efficient and cost effective solution for your specific transformer requirements.Let i 1and i 2equal the currents through the two coils. You can use the formula i 1/i 2= V 2/V 1. In this case, i 1is 6, i 2is 4, and V 2is 10, and if you plug those numbers into the formula, you get 6/4 = 10/V 1. Solving for V 1gives you V 1= 10 * 4/6, so the voltage drop through the primary circuit should be 6.667 volts. In the example above, you would multiply 150 by 50 to get 7,500 and then divide that number by 1,000 to get 7.5 kilowatts. We manufacture custom built transformers for a variety of applications. Our technical team can design and build transformers for unique applications. Our transformer technicians drive us to the forefront of transformer design and manufacturing in the UK. We are an independent British company offering world class transformer solutions. The electrical load that connects to the secondary winding requires a particular input voltage, or load voltage. Let’s call that voltage V. You’ll need to know what this voltage is — you can find it by looking at the electrical schematic.We could say that an example load voltage V must be 150 volts. There are many useful tools online to aid you with transformer rating and design, here is a useful link; Transformer Basics How can we help?