Deltech not only uses a phase angle fired SCR power controller but also uses an isolation type stepdown transformer to control the power supplied to molydisilicide heating elements (Figure 1).
However, the former instrument is sufficient to control the amps and volts needed to fire the load, and the stepdown transformer presents an additional expense.
Figure 1. Control system featuring phase angle fired SCR power controller and isolation type stepdown transformer. Image credits: Deltech Furnaces, Inc.
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This information has been sourced, reviewed and adapted from materials provided by Deltech, Inc.
For more information on this source, please visit Deltech, Inc.