2150909 - CONTROL SYSTEMS ENGINEERING - QUESTION BANK

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MID SEM EXAM SYLLABUS FOR 7 TH SEM, SUB: SWITCH GEAR AND PROTECTION (2170908)

7TH SEM ELECTRICAL 

1   Introduction to Protective Relaying and electromagnetic relays

                Faults, Causes and Effects, Protective Zones, Primary and                      Backup Protection, Desirable Qualities and Terms of Protective  Relaying, Basic Connection of Trip Circuit, Types of Relay Units,     Relay Pick up, Reset or Drop out, Pick up/ Drop off Ratio, Construction and Working of Different Electromagnetic Relays.

2  Over Current Protection of Transmission line

Introduction, Fuse, Thermal Relays, Over Current Relays, Application of Definite Time & IDMT O.C. Relays for Protection of Feeder, Directional Over Current Relay, Limitations of O.C. Relays

3  Differential Protection

Simple Differential Protection, Zone of Protection and Actual Behavior of Simple Differential Protection, Percentage Differential Protection, Earth Leakage Protection

4   Distance Protection of Transmission line

Drawbacks of O.C. Protection, Introduction to Distance Protection, Types of Distance Relay, Impedance, Reactance, MHO Relay, Performance of Distance Relay During Normal Load and Power Swing, Effect of Arc Resistance on Reach of Distance Relays.

5 Theory of circuit Interruption

Introduction, Physics of arc phenomena, Maintenance of the arc, Losses from plasma, Essential properties of arc, Arc interruption theories.

6  Circuit Constant in Relation to Circuit Breaking

Introduction, Circuit breaker rating, Circuit constants & circuit conditions Re-striking voltage transient Characteristics of re-striking voltage, Interaction between the breaker & circuit, Current chopping, duties of switch gear.

7

Theory & Practice of Conventional Circuit Breaker and modern circuit breakers

Automatic switch, Air-break circuit breakers, Oil circuit breakers, Single and multi break Construction, Air-blast circuit breaker.

MID SEM EXAM SYLLABUS FOR 5 TH SEM, SUB: ELEMENTS OF ELECTRICAL DESIGN (2150904)

5TH SEM

SUB : ELEMENTS OF ELECTRICAL DESIGN (2150904)

1) DESIGN OF STARTERS (WITH THEORY).

2) DESIGN FIELD REGULATORS.

3) DESIGN OF SMALL TRANSFORMERS.

4) DESIGN OF BALLAST.

5) DESIGNING OF DC WINDINGS. 

Simplex & Duplex windings; Lap & Wave windings; Applications; Basic terms related to armature windings.

6) DESIGNING OF AC WINDINGS. 

Introduction; No. of phases; Phase spread;Mush winding; Double layer windings; lap and wave winding

NOTICE : special extension arrangement FROM GTU FOR All the students whose course validity is expired.

With reference to the above mentioned NOTICE  all the concerned students are informed that GTU has decided to extend the term  in benefit  to all those students whose validity of the enrolment number has expired as per Notification No. 1 /2012 dated 13th April 2012, at the end of academic year 2016-17.

Their enrolled year are as below :-

         (i)   2009 enrolled BE(D2D) students        : 6 years validity

         (ii)  2010 enrolled BE(D2D) students        : 6 years validity
         (iii)  2011 enrolled BE(D2D) students       : 6 years validity

         (iv)  2008 enrolled BE students               : 8 years validity

         (v)  2009 enrolled BE students                : 8 years validity

The interested student will contact  institution immediately

If student will not register, his/her exam form will not be released. Last date for registering is 04-08-2017.  contact   before last date.

NOTE :-- All students term extension fees will be rs. 1500.

Undertaking for the Sardar Sarovar Visit

All the students who have registered for the Sardar Sarovar Visit will have to give undertaking in writing as per following format as attached herewith.

There will be single copy for all the registered students. Coordinators shall take a print out of this copy and do take necessary signatures of all the students.



UNDERTAKING FORM


Date of Visit: 09/08/17
Time: 5.45 A.M from GEC,Bharuch  College Gate
Return time 8.00 P.M (Approx.)





Prof. P.K.Shah

URGENT AND FINAL REMINDER FOR DESIGN ENGINEERING REGISTRATION

Our DE portal will now again accessible FOR Students/Team for registration till 4th August, Friday (2.00 pm) 2017...

SO, all the students who have not registered yet ( 3 RD AND 5 TH SEM) in DE Portal are instructed to register ASAP...

MID EXAM QUESTION PAPER FORMAT

5th SEMESTER MID EXAM PAPER FORMAT


7th SEMESTER MID EXAM PAPER FORMAT

	Question bank                 ( 7Th  Semester- Electrical)
	Design of A C Machines[ subject code : 2170909]
1	Derive an output equation for 3-ф induction motor with usual notation.
2	Explain the points to be considered for the selection of number of stator slots of an 3-phase induction motor.
3	Explain the factors that effects the choice of specific magnetic & electric  loading in case of a induction machine.
4	Discuss the effect of air gap length on the performance of a 3-phase induction motor.
5	Discuss how the magnetizing current can be estimated from the design data in a three phase induction motor.
6	Discuss the effect of variation of main dimension(D&L) on performance (Rating, losses & efficiency) of  3-ф induction motor
7	Discuss the Harmonic  torque in 3-ф induction motor
8	Prove that torque produce by 5TH harmonics is in backward direction & 7TH harmonics is in forward direction.
9	State the rules for the selection of rotor slots. Describe the methods for reducing the effect of harmonics torque.
10	Explain the deciding factor for stator slots and state the equation for 1) Area of stator slots 2) Stator winding resistance 3) Stator copper losses
11	Explain steps of design of field winding of alternator.
12	Discuss the Methods to reduce the harmonic torque in induction motor
13	Explain importance of damper winding in synchronous machine.
14	Explain the terms “critical speed” and “run away speed” with reference to synchronous machine.
15	Define and explain the term “short circuit ratio” of a synchronous generator and discuss its influences on the machine performance.
16	Explain the effect of skewing the rotor slots in a squirrel cage induction motor.
17	What is the role of damper winding in (i) synchronous generator and (ii)synchronous motor? Derive the equation of MMF of damper winding.
18	Explain the factors that effects the choice of specific magnetic & electric  loading in case of a synchronous machine.
19	Write the steps and necessary equations for rotor design of an synchronous machine
20	Explain the factors which are to be considered while selecting the armature slots of a synchronous machine.
21	Explain briefly the methods for improving e.m.f. wave form of an alternator.
22	Discuss in steps the design of field winding of a salient pole synchronous machine.
23	Discuss the design differences of a salient pole and non salient pole synchronous machines.
24	Explain the factors to be considered while selecting number of armature slots in the design of a synchronous machine.
25	Explain the design of salient pole rotor in a synchronous machine.
26	Explain the current distribution in the bars and the end rings of a squirrel cage induction motor. Also derive the relation for the current in the end ring.
27	What is dispersion coefficient? What is its effect on (i)max.  power factor (ii) over load capacity of induction motor?
28	Derive the equation of rotor resistance referred to stator side, for a squirrel cage induction motor.

MID-SEMESTER TEST SYLLABUS Design of A C Machines(7Th Semester- Electrical)

[ subject code : 2170909] (1)DESIGN OF THREE PHASE INDUCTION MOTOR: MAIN DIMENSIONS: Output equation, choice of specific loadings, separation of D and L. STATOR DESIGN: Stator winding design, Calculation of no. of turns per phase, Conductor’s area, Shape of the stator slots, Area of stator slots, Stator teeth design, Depth of the stator core, Length of air gap, Numerical problems related to above topics. ROTOR DESIGN: A. Squirrel cage rotor – Selection of no. of rotor slots, Effect of harmonics and choice of rotor slots to minimize harmonics, vibration, noise and voltage ripples, Rules for selecting no. of rotor slots, Methods for reducing harmonic torque, Design of rotor bars and rotor slots. Design of end rings and rotor core. B. Wound rotor - Calculation of number of rotor slots, Number of turns, Cross sectional area of rotor conductors, Types of rotor windings, Check for rotor tooth density, Design of rotor slot and rotor core. (2)DESIGN OF SYNCHRONOUS MACHINE: Output equation and design of main dimensions, Short Circuit Ratio (SCR) and its significance, Length of air gap and shape of pole face. ARMATURE DESIGN: Armature winding (Single layer and double layer), Number of armature slots, Slot dimensions, Length of mean turn, Calculation of armature resistance and reactance. DESIGN OF FIELD SYSTEM: Design of magnetic circuit, Open circuit characteristic, Determination of full load field MMF, Design of field winding, Determination of direct and quadrature axis synchronous reactance, Short circuit characteristics.

5th & 7th SEMESTER MID EXAM TIME TABLE