Will be 20KW using 20 - 1KW Elements
The reason for this is for finer control and less of a hit on inverters.
Its easier on inverters to PWM an SSR on a small element than it is on a larger one.
So Im going to use SSRs on all these elements and build a custom PID control to control them.
Elements are Tempco 1000w - 480volt single phase elements. Threads are 1/2 NPT.
I started by taping a piece of string in a spiral around the piece of 6" tubing.
I then marked and drilled all of the holes progressing from 1/8" to 5/8".
Then I cut 1/2" heavy wall couplings and cut off a small portion with about 6 threads.
Then I TIG welded them on around the spiral.