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.
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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 – SCR, IGBT, SCS and TRIAC
Experiment No.: 7 Experiment Name: Testing the proper functioning of power electronic switches – 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
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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
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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: A lightning arrester is a device used on electric power transmission and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal.
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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: The voltage regulation of a synchronous generator [Alternator] can be determined by various methods.
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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 90°C Cotton, Silk, Paper, Wood (without
