There are some example files in comsol:
https://www.comsol.com/model/electric-field-from-power-lines-108291
https://www.comsol.com/model/magnetic-field-from-power-lines-108451
But the problem is the structure here is built from a .mphbin file that I cannot access individually to edit it. The power line they considered here is horizontally spaced whereas I need them to be vertically spaced.