What is substations? All Questions › Category: Switchgear And Protection › What is substations? 0 Vote Up Vote Down Chetan Shidling Staff asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down Chetan Shidling Staff answered 4 years ago Substation means where the voltage is step down. The substation is also used for controlling and switching. Substation consist of various equipment such as circuit breaker, isolator, power transformer, lightning arrester, etc.