Notes on PSI is a write up that covers some of the basic points on Traction Substation and Traction Switching Stations. To view the same in PDF format click the link below :
Posted by Anup Mohan on Friday, August 30, 2013,
In :
Design
Cable sizing is the process of selecting the appropriate sizes for electrical power cable so that the chosen cable works efficiently. Cable sizes are typically described in terms of cross sectional area or in terms of Standard Wire Gauge (SWG) according to the geographic region. It is important to chose the apt size of cable for all applications so that it is ensured the cable satisfies the following requirements; a) The cable should be able to operate continuously under full load with out a... Continue reading ...
Posted by Anup Mohan on Thursday, November 3, 2011,
In :
Transformers
Any transformer is rated based on their losses. The losses of the transformer i.e. the Iron loss depend on the voltage and the copper loss depends on the current. Since the loss does not depend on the power factor, a transformer is rated in terms of kVA (kilo-Volt-Ampere).
A transformer is sized based on the load connected to it. There are two types of load, viz. Continuous load and Intermittent load. As the name suggests, continuous load will always be connected with to secondary of the tran... Continue reading ...
