Rajasthan Rajya Vidhut Prasaran Nigam Limited (RVPNL) is a company established by the government of Rajasthan to provide reliable power transmission services to customers. The presentation discusses the 132 KV G.S.S. substation in Jalore, which receives power from the SSTPS power plant. Key components of a substation include transformers, circuit breakers, current transformers, lightning arresters, and more. The sequence and functions of these components are then explained individually, such as how lightning arresters provide protection from surges and how current transformers are used to measure high currents.