Why ballast or stones are used in substation, give five reasons? Warning: Trying to access array offset on false in /home3/indiakep/public_html/wp-content/plugins/dw-question-answer/inc/Template.php on line 8 All Questions › Category: Switchgear And Protection › Why ballast or stones are used in substation, give five reasons? 0 Vote Up Vote Down Chetan Shidling Staff asked 6 years ago I need short information.