Easy enough.  To find the power given current, multiply by the voltage and then the power factor to convert to W.  For a three phase system multiply by three to get the total power. The product of the voltage and current is the apparent power and measured in VA (or kVA) . L3-L1: 205V By Referring To The Circuit In Figure 3.1 And The Data Given In TABLE 1, (a) Determine The RMS Output Voltage, Vorms And The RMS Output Current, Torms. Similarly a transformer (with three windings, each identical) supplying a given kVA will have each winding supplying a third of the total power. An undersized breaker or same rating with load current breaker can trip and reset the circuit again and again. It supports following input voltages - … Three-phase supply voltages and load systems have two basic configurations; the 4-wire “wye” and the 3-wire “delta”. note: it is a good practice to add extra virtual load to your total load like 10% for future added equipment. = 17.32 Amps, Single phase power input in this instance is 17.32 Amps. Single phase to 3 phase power calculation input requirement = The square root of 3 (1.732) x 10 amps = 1.732 x 10 amps = 17.32 Amps. NAPCES I got the current draw on each phase, and the line-to-line voltages. if you have already calculated the total actual load (Total three phase power), now you can use the following formulas to choose the right generator for you. 6,000 / 1,000 = KVA = 6 KVA . The following formula calculates total power in a three-phase system based on KW and KVAr or voltage and current. Definition: A 3 Phase rectifier is a device which rectifies the input AC voltage with the use of 3 phase transformer and 3 diodes which are connected to each of the three phases of transformer secondary winding. You can't reduce the neutral demand load for 3-wire, single-phase, 208Y/120V or 480Y/277V circuits that consist of two line wires and the common conductor (neutral) of a 4-wire, 3-phase wye system. Calculate voltage drop in a single-phase dc circuit. AC three phase kilowatts to amps calculation Calculation with line to line voltage. Phase 3: 400A. Noting that no overload is permitted. Take a three phase motor (with three windings, each identical) consuming a given kW. Often where single phase loads are involved, residential and commercial premises for example, the system can be unbalanced with each phase have a different current and delivering or consuming a differing amount of power. Single- phase loads are connected to one leg of the wye between line and neutral. The type of motor is going to make this deviate - efficiencies, copper losses, etc. The main difference between a three phase system and a single phase system is the voltage.  In a three phase system we have the line to line voltage (V, three phase power is 36 kW, single phase power = 36/3 = 12 kW, phase 1 apparent power = 80 x 230 = 18,400 VA = 18.4 kVA    Â, phase 2 apparent power = 70 x 230 = 16,100 VA = 16.1 kVA    Â, phase 3 apparent power = 82 x 230 = 18,860 VA = 18.86 kVA, Total three phase power = 18.4 + 16.1 + 18.86 = 53.36 kVA. To increase/decrease the alternating volts in electric power, transformers are used. Notes. After all, a three phase circuit is essentially a combination of three separate single phase circuits which happen to have peaks and valleys separated by a period of time. 2728 S 163rd St. the prime power of the generator set is the 100% capacity of the generator, and this is where a variable load and unlimited hour usage are applied with an average load factor of 80% of the prime rating over each 24-hour period. As an example, consider a lo… The main difference between a three phase system and a single phase system is the voltage.  In a three phase system we have the line to line voltage (VLL)  and the phase voltage (VLN), related by: the easiest way to solve three phase problems is to convert them to a single phase problem.  Take a three phase motor (with three windings, each identical) consuming a given kW.  The kW per winding (single phase) has to be the total divided by 3.  Similarly a transformer (with three windings, each identical) supplying a given kVA will have each winding supplying a third of the total power.  To convert a  three phase problem to a single phase problem take the total kW (or kVA) and divide by three.