10EE756 Testing and commissioning Of Electrical Equipment B.E Question Bank : sjbit.edu.in

Name of the College : SJB Institute of Technology
Subject Code/Name : 10EE756-Testing and commissioning Of Electrical Equipment
Dept : Electrical And Electronics Engineering
Degree : B.E
SEM: : VII
Website : sjbit.edu.in
Document Type : Question Bank

Download Model Question Paper : https://www.pdfquestion.in/uploads/sjbit.edu.in/3265-EEE-VII-TESTING%20AND%20COMMISSIONING%20OF%20ELECTRICAL%20EQUIPMENT%20%5b10EE756%5d-QUESTION%20PAPER.pdf

SJBIT Commissioning Of Electrical Equipment

10EE756-Testing and commissioning Of Electrical Equipment Question Bank.

Related : SJB Institute of Technology 10EE761 Power System planning B.E Question Bank : www.pdfquestion.in/3263.html

UNIT 1& 2

1) What are the Standards and Specifications maintained in Transformer design? Jul-2014
2) Explain Installation, Inspection upon arrival at site and Storage facility at site Dec-2014
3)Explain phasor diagram & phasor group of transformer July-2013
4) Explain the design of a Tanks and testing of tanks in a transformer Dec-2013
5) Explain the importance of Transformer oil and its characteristics Dec-2013

6) Explain Electrical and Chemical properties of transformer oil Dec-12
7) Describe Testing of transformer oil Jul -12
8) Explain the different Drying techniques used in transformers. Jul -14
9) What are the Precautions to be taken while drying in a transformer July -13
10) Explain the various Testing techniques used in Transformers. Jul – 12
11) what are the steps used in Commissioning of transformers. Jul –12

UNIT 3 & 4

1) Explain the various SPECIFICATIONS and ratings of SM Jul -14
2) What are the various steps in installation of an alternator? Jul -14
3) What do you mean by Excitation system and explain various types. Jul – 09
4) Explain why cooling is required and explain various type in cooling Dec – 13
5) Explain Different Testing of Synchronous machines used. Dec-12
6) Explain various test being conducted in alternators. Jul – 12 8M

UNIT 5, 6 & 7

1) Explain the Procurement and Rating of a induction motor. Jul -14
2) Describe the techniques used in Drying of windings in Induction motors. Dec -08
3) Explain various Testing of induction motors Jul -14 ,Dec-12
4) Explain Load Test in a IM Jul- 13, Dec-12
5) Explain the various Methods of starting induction motors. Jul -12

UNIT 8

1) Explain the termsRelay,Fuse, Circuit breaker, Isolator, Loadbreak Switch Jul -14
2) Write a note on Circuit breaker and its types. Dec – 14
3) Explain the various Tests on circuit breakers Dec – 13
4) Explain Mechanical test (Endurance test) on Alternator. Dec -13
5) Explain Impulse voltage test and Time Vs Travel Characteristics of alternator. July -12
6) Explain Short circuit testing station and short circuit test July -12

Notes :
Part-A :
UNIT 1 & 2 : Transformers
Transformers :
a. Specifications : Power and distribution transformers as per BIS standards.
b. Installation : Location, site, selection, foundation details (like bolts size, their number, etc), code of practice for terminal plates, polarity & phase sequence, oil tanks, drying of windings and general inspection. 5 Hours

c. Commissioning tests : Following tests as per national & International Standards, volt ratio test, earth resistance, oil strength, Bucholtz& other relays, tap changing gear, fans & pumps, insulation test, impulse test, polarizing index, load & temperature rise test. 7 Hours

d. Specific Tests : Determination of performance curves like efficiency, regulation etc, and determination of mechanical stress under normal &abnormal conditions. 3 Hours

Unit 3 & 4 :
Synchronous Machines :
a. Specifications : As per BIS standards.
b. Installation : Physical inspection, foundation details, alignments, excitation systems, cooling and control gear, drying out.

c. Commissioning Tests : Insulation, Resistance measurement of armature & field windings, waveform & telephone interference tests, line charging capacitance. 4 Hours

d. Performance tests : Various tests to estimate the performance of generator operations, slip test, maximum lagging current, maximum reluctance power tests, sudden short circuit tests, transient & sub transient parameters, measurements of sequence impedances, capacitive reactance, and separation of losses, temperature rise test, and retardation tests. 6 Hours

e. Factory tests : Gap length, magnetic eccentricity, balancing vibrations, bearing performance 2 Hours

Part-B :
Unit : 5, 6 & 7
Induction Motors :
a. Specifications for different types of motors, Duty, I.P. protection. 2 Hours
b. Installation : Location of the motors (including the foundation details) & its control apparatus, shaft & alignment for various coupling, fitting of pulleys & coupling, drying of windings. 4 Hours

c. Commissioning Test : Mechanical tests for alignment, air gap symmetry, tests for bearings, vibrations & balancing. 5 Hours Electrical Tests: Insulation test, earth resistance, high voltage test, starting up, failure to speed up to take the load, type of test, routine test, factory test and site test (in accordance with ISI code 4 Hours

d. Specific Tests : Performance & temperature raise tests, stray load losses, shaft alignment, and rerating & special duty capability. 4 Hours

Unit 8 :
Switchgear and Protective Devices: Standards, types, specification, installation, commissioning tests, maintenance schedule, type & routine tests.