Report on Fundamentals of Transformer Making and Switchgear Assembling

Abstract

This report is written on the basic of substation that is divided into two parts. One is transformer and another one is switchgear. In this report we focus on various machines which are used for transformer making and switchgear assembling. A transformer is a device that can transfer energy rom one circuit to another by electromagnetic induction To make a transformer, one hundred ourteen tasks were held and we were part of it. Basically a transformer has two coils: LT low tension) coil and HT (high tension) coil. coil is mainly made of copper strip wire and this wire is imported by the company from India, Japan and Singapore. Number of turns ofLT coil depends on transformer power (KVA). LT coil is directly connected to the load, is caned also. lIT coil is made by two types of copper wires, one is bear copper and the one is super enable. Bear copper is not insulated, so msulation is required but super enable is insulated. In most of the cases, bear copper is used to make transformers because sometimes super enable's insulation breaks down. If the insulation breaks then the total transformer falls down. side is called primary side also. Two types of coil are used, spiral a nd disc type of coil. Spiral coil is used for (50-1000) KV A and disc coil is used for above 1000 KV A If the disc type of coil is used then the cost becomes higher, but it has some advantages Jjke long longevity, high insulation and cooling system is better than spiral coil.