BURNDY Master Catalog (20190422)

Substation - Welded/EHV

Design Criteria Nomogram for Determining the Equivalent Height Nomogram for Determining the Equivalent Height

HEIGHT (he) OF A THREE PHASE LINE

Example:

For a three phase line height, (h), of 60 ft. and a phase spacing, (d), of 40 ft., the equivalent height, (he), is 19 ft.

h - Three Phase Line Height Above Ground

d - Phase to Phase Spacing

Nomogram for determining the equivalent height of a single conductor line having the same average voltage of gradient as the CENTER conductor of a horizontally spaced three phase line, with the same line to ground voltage and the same conductor size. All dimensions measured in the same units.

1-800-387-6487 (Canada) 1-603-647-5299 (International)

M-3