BURNDY Master Catalog (20190422)

Substation - Welded/EHV

Design Criteria / Nomogram for Finding Average Conductor- Surface Voltage-Gradient from Line Dimensions and Voltage

Nomogram for finding the average conductor-surface voltage-gradient from line dimensions and voltage

Example: For a 30 ft. high single phase bus* of 4” diameter, V/E = 30. At 450 kV to ground the average conductor-surface voltage-gradient is 15 kV RMS/CM. *For the equivalent single phase height (he) of a 3 phase bus arrangement see the nomogram for determing the equivalent Height (he) of a three phase line.

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M-6