# Year: 2022

## Voltage Class

Voltage Class Maximum voltage under normal condition Tolerance Low Voltage (LV) 250 V +- 6% Medium Voltage (MV) 650 V +- 6% High Voltage (HV) 33 KV -9% to +6% Extra High Voltage (EHV) >33 KV 12.5% to 10%

## Use CRO to observe the output waveform of half wave-controlled rectifier with resistive load and determine the load voltage

Experiment No.: 8 Experiment Name: Observe the output waveform of half wave-controlled rectifier with resistive load using CRO and determine the load voltage. Objective: To observe the output waveform of half wave-controlled rectifier with resistive load using CRO. Determine the load voltage. Theory: A semi converter uses two diodes and two thyristor and there is …

## Testing the Proper Functioning of Power Electronic Switches â€“ SCR, IGBT, SCS and TRIAC

Experiment No.: 7 Experiment Name: Testing the proper functioning of power electronic switches â€“ SCR, IGBT, SCS and TRIAC Objective: To test SCR, IGBT, SCS and TRIAC. Theory: SCR: Silicon Controlled Rectifier (SCR) is a unidirectional semiconductor device made of silicon. This device is the solid state equivalent of thyratron and hence it is also …

## Study of VCB and Identification of Different Parts

Experiment No.: 8 Experiment Name: Study of Vacuum Circuit Breaker (VCB) and identify different parts. Objective: To study VCB To identify different parts of VCB Theory: A vacuum circuit breaker is such kind of circuit breaker where the arc quenching takes place in vacuum. The technology is suitable for mainly medium voltage application. For higher …

## Study of Different Lightning Arrester and Identification of Different Parts

Experiment No.: 7 Experiment Name: Study of different lightning arrester and identify different parts. Objective: To study of different lightning arrester To identify different parts of it Theory: AÂ lightning arrester is a device used onÂ electric power transmissionÂ andÂ telecommunicationÂ systems to protect theÂ insulationÂ andÂ conductorsÂ of the system from the damaging effects ofÂ lightning. The typical lightning arrester has aÂ high-voltageÂ terminal and aÂ groundÂ terminal. …

## Direct Loading Test on 3-ph Alternator to Determine the Regulation and Efficiency

Experiment No. : 8 Experiment Name: Perform the direct loading test on the given three phase alternator and determine the regulation and efficiency. Objective: To perform the direct loading test on the given three phase alternator. To determine the regulation and efficiency. Theory: TheÂ voltage regulationÂ of a synchronous generator [Alternator] can be determined by various methods. …

## Insulation Class

The electrical insulation system for wires used in generators, electric motors, transformers, and other wire-wound electrical components is divided into different classes by temperature and temperature rise. The electrical insulation system is sometimes referred to as insulation class or thermal classification. Sl. No. Insulation Class Temperature Materials Used 1. Y 90Â°C Cotton, Silk, Paper, Wood (without …

## Identify various components of Different Switchgears: A. Circuit Breaker, B. Isolator, C. CTs and PTs, D. Power and distribution Transformers and write their specifications

Experiment No: 6 Experiment Name: Identify various components of different switchgears: A. Circuit Breaker [: i) LT air circuit breaker; ii) Minimum Oil Circuit Breaker; iii) Air Blast Circuit Breaker; iv) SF6 Circuit Breaker; v) Vacuum Circuit Breaker] B. Isolator [vertical break, horizontal break] C. CTs and PTs D. Power and distribution Transformers and write …

## Testing the Over Current Relay and to Plot Inverse Characteristics

Experiment No.: 5 Experiment Name: Testing of Induction Type Over Current Relay using Relay Testing Kit to Plot the Inverse Characteristics. Theory: A non-directional heavily damped induction disc relay which has an adjustable inverse time/current characteristic with a definite minimum time. The relay has a high torque movement combined with low burden and low overshoot. …

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