|
Question bank (6Th
semester)
|
|
|
Design of D C Machines & Transformer[ 2160912]
|
|
|
1
|
Derive an output
equation of DC machines with usual notation
|
|
2
|
Briefly explain the factors
affecting window space factor on transformer
|
|
3
|
Derive the relation between Emf
per turn(Et) and transformer rating(Q)
|
|
4
|
How will the output and losses in
transformer vary with linear dimensions?
|
|
5
|
How area of core is affected by
weight of copper and iron.
|
|
6
|
Explain technical reasons for:
1. Circular coils are preferred in transformer winding. 2. Tapping’s are usually provided on H.V. Side of Transformer |
|
7
|
From the design data discuss how no
load current can be estimated in 3-phase core type transformer.
|
|
8
|
Derive the expression for finding
leakage reactance of three phase core type Transformer.
|
|
9
|
The length of the air-gap is not
uniform under the entire pole face. Why it is so?
|
|
10
|
Explain criteria for selection of
specific loading in d c machine.
|
|
11
|
Write a short note on heating of
electric machine.
|
|
12
|
Explain how pole body height is
fixed while designing field system of a DC machines
|
|
13
|
Explain steps to design field winding of a D.C. machine.
|
|
14
|
Explain various factor affecting
selection of number of poles for D.C. machine
|
|
15
|
List out diff. types of winding used in 3-
phase transformer with its voltage rating. Also explain any one in detail
|
|
16
|
Explain the process of
design of LV and HV winding of a transformer.
|
|
17
|
Explain the process of
design of core of a transformer.
|
|
18
|
Explain effect of change in frequency on
losses, voltage & leakage impedance
of transformer.
|
|
19
|
Explain various
factors affecting selection of air gap length in dc machine.
|
|
20
|
Derive an expression
of the number of Coils of DC machine armature from design parameter
with usual notations |
|
21
|
Explain guiding factors for choice of no of
armature slots. Also show the slot
view with insulations
|
|
22
|
Explain diff. cooling
methods used for oil immersed transformer
|
|
23
|
Explain : a.
Significance of mitered joints in transformer. b. Design difference between
power & distribution transformer.
|
|
24
|
Derive an output
equation of single phase Transformer with usual notation
|
|
25
|
Derive an output
equation of Three phase Transformer with usual notation
|
Thursday, 28 February 2019
Registration for Apprenticeship at Gujarat Alkalies & Chemicals Ltd. (2018 Passed out Electrical only)
2018 Passed out interested students from Electrical are hereby informed to register for Graduate Apprentice Trainee post of Gujarat Alkalies & Chemicals Ltd.
Last date of registration is 28/2/19. Stipend is likely to be Approx. 25000/p.m.
Register Here
Q bank of Testing & Commissioning of Electrical Equipments(For MID-1 only)
Subject Code: 2180901
Subject: Testing & Commissioning of Electrical Equipments
Subject: Testing & Commissioning of Electrical Equipments
| 1 | Draw DY1 & DY11 type transformer connections & state feasibility of connecting them in parallel with reason |
| 2 | Explain polarity test of power transformer |
| 3 | Explain meaning of insulation resistance. How is it measured for power transformer |
| 4 | Define a burden on a CT. What are the markings on primary & secondary terminal CTs? How the polarity of CT is determined. |
| 5 | Explain various troubles, causes & remedies of 3 phase induction motors |
| 6 | What is ‘slip’ of an Induction motor? How can you measure the slip of an induction Motor? |
| 7 | Explain starting test & No load test on 3-phase induction motor. |
| 8 | Explain Back to back test on DC Machine |
| 9 | Explain Field test on DC Machine |
| 10 | Explain tan delta test. |
| 11 | Explain procedure for determination of polarization index for transformer |
| 12 | Explain procedure for drying out of transformer. |
| 13 | Explain behavior of 3 phase induction motor under abnormal frequency condition and under single phasing condition. |
| 14 | How could you measure DC resistance of 3 phase induction motor? |
| 15 | Give reasons and remedial steps for 3 phase slip-ring induction motor for following conditions: 1) Motor fails to start. 2) Motor runs slow. 3) Motor runs hot. |
| 16 | Explain polarity test, ratio checking test and phase sequence test on potential transformer. |
| 17 | Enlist mechanical and electrical test required before commissioning of dc machine. Also write condition for normal working of the dc machine. |
| 18 | Explain Growler and drop test by voltmeter for finding fault location in armature winding. |
| 19 | List out the various tests on transformer. Explain temp. Rise test for same. |
| 20 | Explain power frequency and impulse voltage withstand test on three phase distribution transformer |
| 21 | Explain the purification and filtration process of transformer oil. |
| 22 | Give causes, consequences and remedies for the following abnormal conditions of 3-phase induction motor. 1. Overheating 2. Stalling 3. Excessive speed. |
| 23 | State the methods of measurement of slip of induction motor. Also explain any one in detail. |
| 24 | Explain procedure for conducting Full load test on 3-phase induction motor. Also analyze characteristics of diff. parameters with curves. |
| 25 | What is the necessity of drying of electrical equipment? Explain polarization index of 3-phase induction motor. |
| 26 | Explain the significance of following in performance of electrical equipments. 1. Interpoles in d.c. m/c 2. Partial discharge test on transformer 3. Insulation co-ordination in sub station |
| 27 | Explain the causes of various troubles with commutator and brush gear in d.c. machines. Give remedies for same |
| 28 | Define Degree of Protection of Induction Motor.Explain I.P. and I.C. codes for same. |
| 29 | Explain purposes for performing No-load and Blocked rotor tests on 3-Ñ„ induction motor. |
| 30 | State the properties of good transformer oil? Explain BDV test on transformer oil. |
| 31 | List out the commissioning tests on power transformer. Explain the Voltage ratio test with the help of circuit diagram. |
| 32 | Explain drying out procedure of a 3-Ñ„ induction motor |
| 33 | For the following conditions explain in detail troubles, causes and its remedies for 3-Ñ„ squirrel cage induction motor. i) Motor fails to start ii) Motor runs at 1/7th synchronous speed. iii) Motor heats up |
| 34 | State different tests to be performed on DC machine for efficiency determination. Which test is best out of all on DC shunt motor? Justify your answer. |
| 35 | Differentiate between type and routine test. Explain any two routine test of Power transformer with necessary circuit diagram. |
| 36 | Explain the Troubleshooting and Maintenance of induction motor. |
| 37 | Explain the significance of Polarization Index Number. Explain drying out procedure of Power Transformer. |
| 38 | Explain the Phase group of Power Transformer with necessary vector and winding diagram. |
| 39 | Explain variation of voltage and frequency on performance of Induction motor. |
| 40 | Explain Hopkinson’s Test of D.C.Machines. |
| 41 | Explain
the following test regarding transformer (1) Polarity test (2) Loss
measurement (3) Power frequency with stand test. |
| 42 | What is the significance of polarity in case of current transformer? How can we test the polarity of C.T? |
| 43 | How the D.C/A.C resistance, insulation resistance and block rotor test can be performed on three phase induction motor? |
| 44 | What is the significance of partial discharge measurement and Tan Delta test in case of transformer? |
| 45 | How can we find Dy1 & Dy11 connection in the case of transformer? |
| 46 | How can you find out the polarity test in case of three phase power transformer and what is the significance of it? Can we connect Dy1 & Dy11 transformer in parallel? Give your reason. |
| 47 | Explain
noise measurement, vibration measurement and slip measurement in case of
three phase induction motor. Prof. P.K.Shah |
Tuesday, 26 February 2019
Most Urgent : Regarding 100 Points activity
All the students are informed to enter their 100 points activity on urgent basis as the portal is open for the entry. Students of final year (Year 2015-16 Enrolled students for BE and 2016-17 for D2D) are informed to do it on a priority basis as without completion of 100 points the will not be awarded the final degree.
Monday, 25 February 2019
Registration for Summer Internship Program of Saint Gobain Ltd(Only for 6th Sem Electrical)
Saint – Gobain India Pvt. Ltd. – Glass business, Jhagadia are planning to hire engineering interns for their Summer Internship Program.
For the same, we invite internship applications from 3rd year Mechanical & Electrical students at GEC, Bharuch.
This will be a 2 months paid internship program.
The selection procedure will include online test, Group Discussion and personal interview.
Interested students shall register by tomorrow afternoon 12.30 p.m.
NOTICE FOR FIRST YEAR SEBC STUDENTS
NOTICE FOR FIRST YEAR SEBC STUDENTS
CLICK HERE
NOTE- In above list here by inform electrical students to meet Prof Hitesh Solanki sir at student section ( Admin building ) or at work shop mechanical with following documents self attested documents up to 26/2/2019
1) Caste certificate
2) 12 th marksheet
3) Admission proof of college
4) Bank passbook xerox/ cancel cheque xerox
5) Residential address proof xerox
CLICK HERE
NOTE- In above list here by inform electrical students to meet Prof Hitesh Solanki sir at student section ( Admin building ) or at work shop mechanical with following documents self attested documents up to 26/2/2019
1) Caste certificate
2) 12 th marksheet
3) Admission proof of college
4) Bank passbook xerox/ cancel cheque xerox
5) Residential address proof xerox
EPS II MID SEM -I EXAM SYLLABUS
EPS II MID SEM -I EXAM SYLLABUS
Chapter-1 Symmetrical Three-Phase Faults:
Transients in RL Series circuits, Short-Circuit currents and the reactances of Synchronous machines, Internal voltages of loaded machines under transient conditions, The bus impedance matrix in fault calculations, A bus impedance matrix equivalent network, The selection of circuit breakers.
Chapter -2 Symmetrical Components:
Synthesis of Unsymmetrical phasors from their symmetrical components, The symmetrical components of unsymmetrical phasors, Phase shift of symmetrical components in Star-Delta Transformer Banks [2], Power in terms of symmetrical components, Sequence circuits of Y and Δ impedances, Sequence circuits of a symmetrical transmission line, Sequence circuits of the synchronous machine, Sequence circuits of a Y- Δ transformer, Unsymmetrical series impedances, Sequence networks.
Chapter -3 Current and Voltage Relations on a Transmission Line
Current and Voltage Relations on a Transmission Line: Representation of line, The short transmission line, The medium-length line, The long transmission line: Solution of the differential equations, The long transmission line: Interpretation of the equations, The long transmission line: Hyperbolic form of the differential equations, The equivalent circuit of a long line, Power flow through a transmission line (circle diagrams), Reactive compensation of transmission lines.
Chapter -4 Corona
Critical Disruptive Voltage, Corona Loss, Line Design based on Corona, Disadvantages of Corona, Radio Interference, Inductive interference between Power and Communication lines.
Examples related to above topics
Chapter-1 Symmetrical Three-Phase Faults:
Transients in RL Series circuits, Short-Circuit currents and the reactances of Synchronous machines, Internal voltages of loaded machines under transient conditions, The bus impedance matrix in fault calculations, A bus impedance matrix equivalent network, The selection of circuit breakers.
Chapter -2 Symmetrical Components:
Synthesis of Unsymmetrical phasors from their symmetrical components, The symmetrical components of unsymmetrical phasors, Phase shift of symmetrical components in Star-Delta Transformer Banks [2], Power in terms of symmetrical components, Sequence circuits of Y and Δ impedances, Sequence circuits of a symmetrical transmission line, Sequence circuits of the synchronous machine, Sequence circuits of a Y- Δ transformer, Unsymmetrical series impedances, Sequence networks.
Chapter -3 Current and Voltage Relations on a Transmission Line
Current and Voltage Relations on a Transmission Line: Representation of line, The short transmission line, The medium-length line, The long transmission line: Solution of the differential equations, The long transmission line: Interpretation of the equations, The long transmission line: Hyperbolic form of the differential equations, The equivalent circuit of a long line, Power flow through a transmission line (circle diagrams), Reactive compensation of transmission lines.
Chapter -4 Corona
Critical Disruptive Voltage, Corona Loss, Line Design based on Corona, Disadvantages of Corona, Radio Interference, Inductive interference between Power and Communication lines.
Examples related to above topics
Notice for Change in Classroom on 26-2-19
The following changes in the classroom have been made for 26-2-19, Tuesday during 10.30 AM to 12.30 PM.
Class Room No.
4-A : 4005
4-B : 4006
6-A : 4009
6-B : 4007
For the rest of the divisions, the classrooms/laboratories are unchanged.
Class Room No.
4-A : 4005
4-B : 4006
6-A : 4009
6-B : 4007
For the rest of the divisions, the classrooms/laboratories are unchanged.
MID - 1 SYLLABUS OF PSPD FOR SEM-8th ELECTRICAL
MID - 1 SYLLABUS OF POWER SYSTEM PLANNING AND DESIGN
SUBJECT CODE: 2180903
CH.-1 Transmission lines design
CH.-2 Design of distribution systems
CH.-3 Design of power system
CH.-4 Power System Earthing
Also refer old GTU papers.
CH.-1 Transmission lines design
CH.-2 Design of distribution systems
CH.-3 Design of power system
CH.-4 Power System Earthing
Also refer old GTU papers.
MID SEM-1 SYLLABUS OF SIGNALS AND SYSTEMS
SUBJECT CODE: 2141005 (SEM:4)
Note: Students will have prepare past papers of GTU as per syllabus contents.
Chapter1:
Basic definitions, Classification of signals and systems. Signal operations and properties. Basic continuous time signals, signal sampling and quantization, discretization of continuous time signals, discrete time signals. Basic system properties, Representation of digital signals. Case study of different signals form communication and biomedical field
Chapter 2:
Impulse response characterization and convolution integral for CT- LTI system, signal responses to CT-LTI system, properties of convolution, LTI system response properties from impulse response.
Chapter 3: (Partial only)
Impulse response characterization and convolution sum, Causal signal response to DT-LTI systems. Properties of convolution summation.
Chapter 4:
The z-Transform, Convergence of z-Transform, Basic z-Transform, Properties of z-Transform, Inverse z-Transform and Solving difference equation using z-Transform.
Note: Students will have prepare past papers of GTU as per syllabus contents.
Chapter1:
Basic definitions, Classification of signals and systems. Signal operations and properties. Basic continuous time signals, signal sampling and quantization, discretization of continuous time signals, discrete time signals. Basic system properties, Representation of digital signals. Case study of different signals form communication and biomedical field
Chapter 2:
Impulse response characterization and convolution integral for CT- LTI system, signal responses to CT-LTI system, properties of convolution, LTI system response properties from impulse response.
Chapter 3: (Partial only)
Impulse response characterization and convolution sum, Causal signal response to DT-LTI systems. Properties of convolution summation.
Chapter 4:
The z-Transform, Convergence of z-Transform, Basic z-Transform, Properties of z-Transform, Inverse z-Transform and Solving difference equation using z-Transform.
MID SEM TEST SYLLABUS
SUBJECT : DESIGN
OF DC MACHINES AND TRANSFORMER
SUBJECT CODE : 2160912
SEMESTER
: 6TH
Ch – 1 :GENERAL DESIGN
ASPECTS:
Specific electric loading and Specific
magnetic loading;
Output coefficient; Output equations for
transformers and
rotating machines;Factors affecting size of
machines;
Criteria for selection of specific loadings;
Heating and
Cooling of Transformers and rotating
machines
Ch – 2 :DESIGN OF THREE PHASE
TRANSFORMER:
Types of
transformers; Position of HV and LV windings and
its importance; Relation between core and yoke
cross
section area
and its significance; Different types of transformer
windings; Different positions of taping;
Window space factor;
Factors affecting window space factor;
Relation between
emf per turn
and transformer rating; Stacking factor.
MAIN
DIMENSIONS:
Design of window dimensions, yoke dimensions and overall
core dimensions; Numerical examples.
DESIGN OF WINDINGS:
Design of HVand LV windings (No. of turns and area of
cross section); Selection of type of winding.
PERFORMANCE PARAMETERS
ESTIMATION:
Primary and secondary winding resistance and Leakage reactance
calculation; Calculation of no
load current, losses and temperature
rise of transformer;
Ch -3 : DESIGN OF DC
MACHINES:
Introduction; Output
equation; MMF calculation; Selection of
number of poles; Design of core length and
armature diameter;
Carter’s fringing curves and its significance;
Design of length
of air gap; Numerical
examples.
ARMATURE DESIGN:
Choice of armature
winding; Armature conductor; Number of
armature slots; Slot dimensions; Slot loading;
Design of armature
core; Numerical examples.
DESIGN OF FIELD SYSTEMS:
Pole design; Design of field winding of shunt, series and compound
machines;
MID SEM SYLLABUS FOR THE SUB: PSOC 8TH SEM
CHAPT: 1.
Automatic Generation and Voltage Control: Introduction; Load Frequency Control (Single Area Case); Load Frequency Control and Economic Despatch Control; Two-Area Load Frequency Control; Optimal (Two-Area) Load Frequency Control; Automatic Voltage Control; Load Frequency Control with Generation Rate Constraints (GRCs); Speed Governor Dead-Band and Its Effect on AGC; Digital LF Controllers; Decentralized Control.
CHAPT:2 Power System Security: Introduction; System State Classification; Security Analysis; Contingency Analysis.
CHAPT 3. Reactive Power and Voltage Control: Introduction; Reactive power requirement of an uncompensated line; Implication of surge impedance loading; Reactive loss characteristics of transmission line; Operation of a transmission line at no load condition; Operation of a transmission line under heavy loading condition; Voltage regulation of the transmission line and its relation with reactive power; Maximum power transfer in an uncompensated line; Line loadability. Reactive power-voltage (Q-V) coupling concept; Governing effects on reactive power flow; Relation between voltage and reactive power at a node in a power system; Reactive power requirement for control of voltage in long lines;Operational aspects in reactive power and voltage control; Basic principle of system voltage control; Reactive power flow constraints and their implications in loss of voltage; Effect of transformer tap changing in the post disturbance period; Effect of generator excitation adjustment in the post disturbance period; Practical aspects of reactive power flow problems leading to voltage collapse in EHV lines.
4. State Estimation: Introduction; Least Squares Estimation: The Basic Solution; Static State Estimation of Power Systems; Tracking State Estimation of Power Systems; Some Computational Considerations; External System Equivalency; Treatment of Bad Data; Network Observability and Pseudo-Measurements; Application of Power System State Estimation
Automatic Generation and Voltage Control: Introduction; Load Frequency Control (Single Area Case); Load Frequency Control and Economic Despatch Control; Two-Area Load Frequency Control; Optimal (Two-Area) Load Frequency Control; Automatic Voltage Control; Load Frequency Control with Generation Rate Constraints (GRCs); Speed Governor Dead-Band and Its Effect on AGC; Digital LF Controllers; Decentralized Control.
CHAPT:2 Power System Security: Introduction; System State Classification; Security Analysis; Contingency Analysis.
CHAPT 3. Reactive Power and Voltage Control: Introduction; Reactive power requirement of an uncompensated line; Implication of surge impedance loading; Reactive loss characteristics of transmission line; Operation of a transmission line at no load condition; Operation of a transmission line under heavy loading condition; Voltage regulation of the transmission line and its relation with reactive power; Maximum power transfer in an uncompensated line; Line loadability. Reactive power-voltage (Q-V) coupling concept; Governing effects on reactive power flow; Relation between voltage and reactive power at a node in a power system; Reactive power requirement for control of voltage in long lines;Operational aspects in reactive power and voltage control; Basic principle of system voltage control; Reactive power flow constraints and their implications in loss of voltage; Effect of transformer tap changing in the post disturbance period; Effect of generator excitation adjustment in the post disturbance period; Practical aspects of reactive power flow problems leading to voltage collapse in EHV lines.
4. State Estimation: Introduction; Least Squares Estimation: The Basic Solution; Static State Estimation of Power Systems; Tracking State Estimation of Power Systems; Some Computational Considerations; External System Equivalency; Treatment of Bad Data; Network Observability and Pseudo-Measurements; Application of Power System State Estimation
Mid sem syllabus for the sub: FIELD THEORY (2140909)
1. Vector Analysis
Scalars and Vectors, Vector Algebra, The rectangular co-ordinate system, Vector components and unit vectors, The vector field, The dot product, The cross product, Circular cylindrical co-ordinates, Spherical co-ordinate system.
2.Coulomb’s law and Electric Field Intensity
The experimental law of Coulomb, Electric field intensity, Field due to a continuous volume charge distribution, Field of a line charge, Field of a sheet charge.
3.Electric Flux Density, Gauss’ law and Divergence
Electric flux density, Gauss’ law, Application of Gauss’ law: some symmetrical charge distributions, Application of Gauss’ law to differential volume element, Divergence, Maxwell’s first equation, The divergence theorem.
4. Energy and Potential
Energy expended in moving a point charge in electric field, The line integral, Definition of potential and potential difference, The potential field of a point charge, The potential field of a system of charges, Potential gradient, The dipole, Energy density in the electrostatic field.
5.The Steady Magnetic Field
Biot Savart law, Ampere’s circuital law, Curl, Stoke’s theorem, Magnetic flux and magnetic flux density, The scalar and vector magnetic potentials, Derivation of steady magnetic field laws.
6.Magnetic Forces, Materials and Inductance
Force on a moving charge, Force on a differential current element, Force between differential current elements, Force and torque on a closed circuit, The nature of magnetic materials, Magnetization and permeability, Magnetic boundary conditions, The magnetic circuit, Potential energy and forces on magnetic materials, Inductance and mutual inductance
Scalars and Vectors, Vector Algebra, The rectangular co-ordinate system, Vector components and unit vectors, The vector field, The dot product, The cross product, Circular cylindrical co-ordinates, Spherical co-ordinate system.
2.Coulomb’s law and Electric Field Intensity
The experimental law of Coulomb, Electric field intensity, Field due to a continuous volume charge distribution, Field of a line charge, Field of a sheet charge.
3.Electric Flux Density, Gauss’ law and Divergence
Electric flux density, Gauss’ law, Application of Gauss’ law: some symmetrical charge distributions, Application of Gauss’ law to differential volume element, Divergence, Maxwell’s first equation, The divergence theorem.
4. Energy and Potential
Energy expended in moving a point charge in electric field, The line integral, Definition of potential and potential difference, The potential field of a point charge, The potential field of a system of charges, Potential gradient, The dipole, Energy density in the electrostatic field.
5.The Steady Magnetic Field
Biot Savart law, Ampere’s circuital law, Curl, Stoke’s theorem, Magnetic flux and magnetic flux density, The scalar and vector magnetic potentials, Derivation of steady magnetic field laws.
6.Magnetic Forces, Materials and Inductance
Force on a moving charge, Force on a differential current element, Force between differential current elements, Force and torque on a closed circuit, The nature of magnetic materials, Magnetization and permeability, Magnetic boundary conditions, The magnetic circuit, Potential energy and forces on magnetic materials, Inductance and mutual inductance
ELECTRICAL POWER GENERATION (2140908) MID EXAM SYLLABUS
ELECTRICAL POWER GENERATION
MID EXAM SYLLABUS
SUBJECT CODE: 2140908
|
|
|
|
|
|
Topics
|
|
|
|
|
|
|
|
|
Chapter No.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1
|
Introduction:
Amount of generation
of electric power
from Conventional and non conventional sources of energy in Gujarat and
India and some developed countries of the world.
|
|||||||||||
|
2
|
Steam
power station:
|
|||||||||||
|
|
Schematic arrangement, advantages and
disadvantages, choice of site, efficiency of steam power station, Types of
prime movers, characteristic, speed control & auxiliaries. Environmental
aspects for selecting the sites and locations of thermal power stations.
|
|||||||||||
|
|
|
|||||||||||
|
3
|
Hydro power station:
|
|
||||||||||
|
|
Schematic arrangement, advantages and
disadvantages, choice of site
constituents of hydro
power plant, Hydro
turbine. Environmental aspects
for selecting the sites and
locations of hydro power stations
|
|||||||||||
|
|
|
|||||||||||
|
4
|
Nuclear
power station:
|
|||||||||||
|
|
Schematic arrangement, advantages and
disadvantages, selection of site, types
of reactors, Hazards,
Environmental aspects for selecting the sites and locations of
nuclear power stations.
|
|||||||||||
|
|
|
|||||||||||
|
5
|
Diesel
power station:
Introduction, Schematic arrangement, advantages and disadvantages,
Choice and characteristic of diesel engines, auxiliaries.
|
|||||||||||
|
|
|
|||||||||||
|
7
|
Tariff and Economic aspects in power Generation:
|
|||||||||||
|
|
Terms
commonly used in
system operation, various
factors affecting cost of generation: Load curves, load duration
curves, Connected load, maximum load, Peak load, base load and peak load
power plants, load factor, Plant capacity factor, Plant use factor, Demand
factor, diversity factor,
Cost of power
plant, Tariffs
|
|||||||||||
|
|
|
|||||||||||
|
11
|
Substation
|
|||||||||||
|
|
Classification of Substations, substation
equipments, Specification and selection of equipments, Site selection of
substation
|
|||||||||||
|
|
|
|||||||||||
|
12
|
Neutral
Earthing:
|
|||||||||||
|
|
Introduction, isolated neutral, earth neutral
systems-solid, resistance, reactance. Arc suppression coil, voltage
transformer and earthing, transformer, earthing systems.
|
|||||||||||
*************************************************************************************
Subscribe to:
Posts (Atom)