Deepakkumar Yadav
Deepakkumar Yadav Transformer Windings Q. Draw neat sketches and discuss the special features of following windings used for 3 phase transformer : Cylindrical winding, Helical winding, Crossover winding, Disc winding. List the typical voltage and current ranges over which they are used. Q. Why transformer LV winding is place near to Core? Different type of windings are … Read more
Testing of Electrical Transformer (A) Polarity Test (B) Phasing Out Test (A) Transformer Polarity Test The H.V. and L.V. terminals of a single phase and three phase transformer should always be marked as shown in Figure (IS 2026-1962). For a 3 phase transformer, viewed from H.V. side the arrangement of both sets of terminals shall … Read more
Types of Transformers Q. Give the types of transformers. Types of Transformers (A) According to the secondary voltage. Step-up Step down. (B) According to the supply system Single phase. 3-phase transformer (C) According to the purpose Power transformer Distribution transformer Instrument transformer Auto transformer (D) According to the construction Core type Shell type Distributed core … Read more
Working Principle of Transformer Q. Explain the working principle of a transformer. The transformer works on the principle of electromagnetic Induction. Explanation of Working Transformer has the iron core. There are two windings put on the iron core. One winding has N1 number of turns and is connected to A.C. supply. This winding is called … Read more
Electric Power flow Give stages where transformers are used in electric system. (I) Generation of Electric Power The electricity is generated in the generating station by a generator (alternator). The generator generates electrical power at a definite voltage. The generating voltage is 6.6KV or 11KV. (II) Transmission of Electric Power Q. Why Transmission … Read more
Electrical Transformer Q. Give the construction of a three phase transformer. Explain the same. Q. Write a note on Transformer. A transformer is a static device, which transfers power from one circuit to another circuit with the desired change is voltage and current without any change in the frequency. It consists of two or more … Read more
Why Transformer Neutral Connected to Earth Distribution systems are earthed to create a reference point for the system voltage, to facilitate the detection and discriminative isolation of faults involving contact to earth, and to limit over-voltages under transient conditions. A neutral earthing system is a system in which the neutral is connected to earth, either … Read more
Electrical Faults and Electrical Faults Causes Failures which are mechanical in nature are very slow and show some visible signs of their approach. But electrical failures are sudden and without any pre-warning, excepting to an experienced person. After the electrical installation is commissioned, it normally works alright. Failures however rises later on due to the following causes … Read more
Oil Circuit Breakers : Q. State the required properties of oil in CB. Q. What is Oil Circuit Breaker. Search Results Web resuQ. What is Oil Circuit Breaker Properties of oil in C.B. : It should have high dielectric strength. It should have good thermal conductivity. It should have high breakdown strength. It should have low … Read more
Low oil Circuit Breakers (MOCB) Q. Draw neat diagram MOCB. Explain its working. Q. Draw a neat labeled diagram of MOCB. In case of bulk oil circuit breaker oil is used for two functions. – Firstly it acts as an arc-quenching medium and … Read more