Three phase heater wiring and load calculations
I have a heater unit of 18 KW
It is a Three Phase unit in which I have connected 4 x 1.5 KW heater across each Phase to Neutral.
thus having 3 x 4 x 1.5 KW = 18 KW Total.
It draws appx 24 amps per phase and appx 1 amp in neutral due to little imbalance in heater.
The above are connected as Star or WYE. We have appx 240 V across Phase to neutral.
Not I intend to increase my heating to appx 27 KW.
I am to place an order for 1.5 heaters rated at 415 VAC
I will be connected the heaters as Delta.
That is 6 heaters is connected across two phases.
Thus I will be connecting 3 x 6 x 1.5 KW Heaters = Total 27 KW.
What I wish to know is what will be the ampears drawn from each phase of the supply.
I am confused.
Thanks & Best Regards