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1. |
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 mm |
D. | 5 + 0.9 kV mm |
Answer» E. | |