Foralternating currents, the 7 kW amp transformation is different for a single phase and a 3 phase system; the power factor is needed in both cases. In case of the three-phase
Thereis a limit to the load that a single phase can handle and typically that number is set to 7.5 kW (or 7500 watts or 10 Horse Power) (but varies from state to state). So if the sum of wattage of all the appliances that you are running at a time is more than 7.5 kW, then you need a three-phase connection.
P= V x I Cos Φ for 1 phase load . Rated Load Current = P / (1.732 x V x Pf x Eff) I= 90000 / (1.732 x 415 x 0.8 x .99 ) =90000/540= 157 amp ~ 157 A. in ideal case 157 amp shall be current capacity of cable and if we look at the cable size chart we will find that for 157 amp the current rating cable size 70mm2 cable size would be perfect.
Howmany amps are in a single phase heater? A coworker is arguing the following: Each element is producing 15KW/3 = 5 KW per element. Treating each leg separately, one can treat it as a ‘single phase’ circuit with 208V across the element. So amps per leg is 5 KW *1000/208V = 24 amps.
BuyATO 10 hp 7.5 kw Soft Starter, 30A AC Motor Starter, 3 Phase 240V, with RS485 Communication Interface, Soft Starter for Three Phase Electric Motor: Input Frequency 50Hz/ 60Hz, 240v Input-Current: 30 amps 【Function】Make AC motor in soft start & soft stop, protecting AC motor from over-voltage, over-current and phase
. 331 711 22 309 110 577 873 627
7.5 kw to amps 3 phase
