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Vacuum Circuit Breaker

Vacuum Circuit Breaker: Although the advantages of interrupting the arc in a vacuum were recognized as early as the nineteenth century, this did not find wide application till a few…

Three Phase Auto Recloser vs Single Phase Auto Recloser

Three Phase Auto Recloser vs Single Phase Auto Reclose: Three Phase Auto Recloser is one in which the three phases of the transmission line are opened after fault incidence, independent…

Types of Auto Reclosing: Types of Auto Reclosing can be broadly classified in two categories: Medium voltage auto-reclose where continuity of supply is the principal aim. High voltage auto-reclose where…

Important Questions of Sub Stations

Important Questions of Sub Stations: 1. What is a sub-station ? Name the factors that should be taken care of while designing and erecting a substation. 2. Discuss the different…

Measures for Energy Conservation in Electrical Drives

Measures for Energy Conservation in Electrical Drives: Following Measures for Energy Conservation in Electrical Drives: Use of efficient semiconductor converters. Use of efficient motors. Use of variable speed drives. Energy…

Power Factor Improvement Methods

Power Factor Improvement Methods: There are many drives which operate at a low power factor. Some of Power Factor Improvement Methods are: An induction motor direct on line. ac-dc diode…

Braking System in Train

Braking System in Train: Braking System in Train has number of advantages over mechanical braking. It reduces wear and tear on rails and wheels, substantially increasing their life. It is…

Electric Traction Services

Electric Traction Services: Electric Traction Services can be broadly classified as: Electric Trains. Electric buses, trams (or tramways) and trolleys. Battery driven and solar powered vehicles. Electric Trains: Electric trains…