Vd = 1. The inputs are the transformer kVA (power), and the voltage in the primary and secondary windings. X actual = 0.0047 ohms > value of the actual reactance This free online transformer calculator allows you to calculate the full load current in the primary and secondary transformer windings. Next, assign a K-factor designation that corresponds to the relative level of harmonics drawn by. X actual = 10 (1.63%) (0.23 KV) ^2 > use 230 V secondary as base voltage 1- List the kVA value for each load category to be supplied. R actual = 0.0031 ohms > value of the actual resistance R actual = 10 (1.08%) (0.23 KV) ^ 2 > use 230 V secondary as base voltage The process is still the same above but we differ only in the final calculation of the current since the value that we can get is to be multiplied with sqrt(3) or 1.73. The transformer has manufacturer rating given below. Vd = 231 A x įind the voltage drop of the three phase transformer supplying a 100 KVA load with a power factor of 0.80. If you have a Eurpoean voltage or something else that is uncommon here then give us a call. This tool only evaluates common voltages for North America (ie. X actual = 0.0182 ohms > value of the actual reactance This tool will allow you calculate the KVA that you need. If the ratio of KVA rating to percentage impedance of two transformers. X actual = 10 (3.44%) (0.23 KV) ^2 > use 230 V secondary as base voltage It is easy to calculate the maximum current that a transformer can deliver under. ![]() ![]() ![]() R actual = 0.01185 ohms > value of the actual resistance R actual = 10 (2.24%) (0.23 KV) ^ 2 > use 230 V secondary as base voltage In determinin23g the actual values we need to use the following formula, In this case the resistance and reactance of the transformer is given in its percentage form, therefore we need to determine the actual value of these quantities. Read: What is the Importance of X/R Ratio?įind the voltage drop of the single phase transformer supplying a 50 HP motor with a power factor of 0.70.
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