A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?
A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________? A. 1 + 0.2 kVmm B. 2 + 0.5 kVmm C. 4 + 0.7 kV mmD. 5 + 0.9 kV mm