Sir I am training at five weeks
MRS, LTS,TAS,ELECTRONI LAB,
PLZ SIR send my mail id
ajaykumariimt415[at]gmail.com

Indian Railway is the world’s fourth largest commercial, by number of employees with over million employees. Railways were first introduced in India in 1853. Indian Railways operates both long distance and suburban rail system on a multi-gauge network of board meter and narrow gauges.  Form 20th Dec 2010, the railways had developed a 5 digit numbering system. This need is required because IR RUNS 10,000 trains daily
The feeders that receives the power form CESC, and the power is step down with the help of step down transformer and then supplied to various colonies, piller box, etc. This process is shown with the help of above connection diagram .  6kv from CESC goes to HT ocb 400A with the hwlp of HT busbar 400A is divided into two 200A and sent to two transformer each of 250 kva then sent to various parts.
OIL TYPE TRANSFORMER Transformer oil or insulating oil is usually a highly-refined mineral oil that is stable at high temp and has excellent electrical insulating properties. It is used in oil-filled transformers, circuit breakers. Its function are to Insulate, suppress corona and arcing, and to serve as a coolant. The oil helps cool the transformer because it also provides part if the electrical insulation between internal live parts, transformer oil must remain stable at high temp for an external radiation through which the oil circulates by natural convection. The flash point(min) and pour point(max) are 140 c to -6 c respectively. The dielectric strength of new untreated oil is MV/m (RMS)and after treatment it should be>24 MV/m (RMS)