# Electrical Notebook

Hay, I am Pranab. Passed Diploma in Electrical Engineering on 2015 from K. G. Engineering Institute, Bishnupur

## SSC JE Electrical / Mock Test Series : 2

Topic : Mixed Technical (Electrical Engg.) No. of Question : 100 Type : MCQ Time : 60 Minutes

## SSC Junior Engineer (Electrical) Free Mock Test Series

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## SSC JE Electrical / Mock Test Series : 1

Topic : Mixed Technical (Electrical Engg.) No. of Question : 100 Type : MCQ Time : 60 Minutes

## Relays for Protection against 50 MVA 132/33 kV Transformer

Sl. No. Type of Relay Relay Name Appearance ANSI Code Purpose 1. Numerical Relay Trafo. Differential Protection Relay 87 For protection against phase-to-phase fault and phase to earth faults 2. Numerical Relay Over Current & Earth Fault Protn. Relay 51 For protection of transformers from over current and earth faults 3. Circulating Current E/F Diffn. …

## 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. …

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