PART III

Electrical Inspectorate Department

©

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Government of Kerala

2015

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KERALA GAZETTE

B[nImcnIambn {]kn≤s∏SpØp∂Xv

PUBLISHED BY AUTHORITY

Regn. No. KERBIL/2012/45073

dated 5-9-2012 with RNI

Reg. No. KL/TV(N)/634/2015-17

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Thiruvananthapuram,

Tuesday

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Vol. IV

2015 HIvtSm_¿ 13

13th October 2015

1191 I∂n 27

27th Kanni 1191

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263

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ELECTRICAL INSPECTORATE DEPARTMENT

8

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264

13th OCT. 2015]

ELECTRICAL INSPECTORATE DEPARTMENT

9

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DETAILS OF ELECTRICAL SUPERVISOR ‘B’ GRADE

EXAMINATION—2015

PART I

PAPER-I

Basic Electrical Engineering—Theory

Maximum Marks—100

Time—3 Hours.

1.

Principles of Electricity:—Electric pressure,

current and resistance, Ohm’s Law, Kirchoff’s

Law—Specific resistance. Law of resistance and

their application for calculating voltage drop.

Series and parallel circuits. Unit of voltage,

current, resistance, power and energy, Relation

between electrical power unit (kW) and

mechanical power unit (H.P.), Inductance,

Capacitances, Reactance, Impedances.

2.

Electromagnetism—Production of E.M.F.—

Faraday’s and Lenz’s Laws and Fleming’s left

hand rule, Fleming’s right hand rules, Magnetic,

chemical and heating of electric current.

Magnetic properties of material, Permeability,

Hystersis, Electromagnets and their application.

3.

Materials — Conductors — Semi conductors and

insulators, Classes of insulation—Insulating

materials and their relative merits. Transformer

Oil, Effect of heat and moisture on insulation.

Lubricants and their uses—Dielectrics—

Dielectric strength permittivity.

4.

Circuits —Series, Parallel, Series-Parallel

circuits,

Phasor

addition,

subtraction,

multiplication and division, Complex impedance—

Phase Sequence Simple L.C.R. circuit and

solutions—Star

delta

connections

and

transformations. Power and power factor—Net

work solutions-3 phase circuits — Balanced and

unbalanced loads—Symmetrical components and

sequence impedance.

5.

Generation of Electricity — (a) A.C. Generators—

Constructional

features

and

essentials

components—E.M.F. equation—Synchronous

Reactance,

Regulation,

Voltage

Control

Synchronizing— Synchroscopes—Bright lamp and

dark lamp methods. (b) D.C. Generators—

Essential components and constructional features,

Shunt, Series and compound Generators and their

characteristics. Causes of Sparking - Interpoles,

Commutators and their maintenance, Carbon

brushes, their adjustment and methods of voltage

regulations.

6.

Transformer—Single phase and 3 phase

transformers—Constructional

features–

Transformation ratio –Voltage and current

equations–Magnetizing current, leakage reactance –

Equivalent

circuit

–

Core

and

copper

losses – Efficiency – Open circuit and short

circuit tests – Auto transformers – Temperature

rise

–3

phase

connections

and

vector

group

–

Scott

connection–Instrument

transformers–Territory windings–dry type trans-

former.

7.

Motors — (a) A. C. Motors—Rotating magnetic

field, single phase induction motors—Different

types—Working principle of 3 phase induction

motors—Squirrel cage and slip-ring—Methods of

starting, Slip torque characteristics, no load and

blocked rotor tests—Efficiency—Circle diagram

and determination of characteristics, Synchronous

motors, Commutator motors. (b) D.C. Motors–

Theory of series, shunt and compound wound

motors, their uses, installation, methods of

starting and speed control and reversal of

direction.

8.

Conversions—Motor generator sets—Rectifiers—

Half wave and Full wave rectifiers - Single phase

and 3 phase - Voltage Equation – Filtering.

9.

Batteries—Primary cells, Dry cells, Storage or

secondary batteries—Constructional features of

storage batteries or accumulators and their

installations. Lead acid cells, Nickel iron or

alkaline cells, Initial and subsequent charging of

batteries, charging circuits and their calculations.

Series and parallel circuits. Maintenance of

batteries. Use of hydrometers.

10.

Transmission and Distribution—Line constants—

Determination of voltage drop – Regulation—

Short, medium and long lines. Ferranti effect,

Economic size of conductors—Coronaloss –

Power loss –design of a ground conductor–

Lightening arrestors.

11.

Constructional feature of U.G. Cables—Fault

location—Murray and Varley loop tests –Charging

currents.

265

13th OCT. 2015]

ELECTRICAL INSPECTORATE DEPARTMENT

10

PAPER-II

Basic Electrical Engineering—Application

Maximum Marks—100

Time—3 Hours.

1.

Design of Electrical Installations—Load survey-

Domestic-Commercial and industrial installations-

Connected load—Maximum demand-Demand

factor—Diversity factor, Load factor-Selection of

sub-station site-Transformer capacity-Selection of

distribution voltage-Main and sub-switch boards-

Distribution fuse board—M.C.C.—P.M.C.C.—

P.C.C. Distribution layout—Location of switch

board-Fault level calculations.

2.

Selection of Equipments—Different types of

breakers-O.C.B.—A.C.B - V.C.B.—M.C.C.B.—

M.C.B.—Contactors. Breaking capacity—Making

capacity. Selection of Distribution fuse board—

Continuous ratings-H.R.C. fuses- prospective

currents—Cut off values—Selection of major and

minor fuses – Grading switch boards, design of

outlets, fabrication, design-Parameters—F.B.A.

regulations. Cable short time and continuous

rating – De-rating factors - Methods of laying –

Design aspects of different type of cables in

Hazardous areas-Motors-Selection method of

starting D.C. Motors-Speed control, Limitation on

starting current and voltage drop-system distur-

bance. High voltage motors, Protection—

capacitors—Power

factors

improvement-

Selection and method of connection - Special type

transformers-Rectified

transformers–Scott

connection-

tertiary

windings.

Captive

generation—Determination of capacity - Load

segregation - Double bus system, change over

arrangements - I.S. Regulations.

3.

Protection—Basic methods of Transformer,

Generator, Motors and Feeder protections,

Thermal and magnetic releases-Relays-I.D.M.T

Instantaneous types-Over current - Earth fault and

earth leakage relays-Time and current setting- P.Ts

and C.Ts. Specification and error factors.

Static Relays I.S. Regulations.

4.

Earthing—Determination of size of earth bus,

number of earth electrodes. Plate, Pipe and strip

electrodes- Resistivity of soil measurement –

Computation of earth resistance-Different

materials used for earthing conductors-Current

densities-Corrosion factors-Disposition of

electrodes-Joints in earth conductors. Size of

earth conductors for equipments of various

capacities. Earth continuity wire-earth continuity

resistance. I.S. Regulations.

5.

Cable Joining—Aluminium and copper cable

joints—Type - precautions—Termination—I.S.

Regulations.

6.

Clearances—Statutory clearances of live parts

from ground and buildings— Sectional clearance-

Equipment clearance –Switch boards clearance

inside and outside –Oils containing equipments.

Indoor and outdoor equipment clearances-Relevant

standards and regulations.

7.

Special Type of Installations—C.T. Scan, X-ray,

Neon Sign, Lift, Cinema installations—Relevant

Rules, circuitry Safety precautions—Earthing -

precautionary measures-Energy meters—Tri-vector

meter—Installations and computation of energy.

8.

Testing and Maintenance—Insulation Tester-Earth

Tester—Relay testing kit., Schering bridge Break

down test of oil—Single phase and 3 phase

energy meter testing—Volt meter—Ammeter—

Wattmeter—Different installations—Recom-

mended values of insulation resistance—Earth

resistance measurements. Desired values -

Continuity measurements - Relay testing -

Maintenance of various electrical installations—

Relevant standards and regulations.

9.

Rules and Standards—The Electricity Act 2003,

the CEA (Measures Relating to Safety and

Electric Supply) Regulation 2010, Kerala Cinema

Regulation Rules 1988—Kerala Electricity

Licensing Boards Rules – Condition of Supply-

Provisions applicable to consumers and

contractors in particular I.S./ NEC- Specifications

I.E.C. Regulations.

PART II

Practical and Viva Voce.

Maximum Marks—100

A Practical Examination based on the Syllabus in Part I

will be held.

Note:—The candidate should obtain 50% in part II for a pass.

Electrical Supervisor Grade ‘B’ Competency

Certificate and Permit

(i) The successful candidates will be eligible for

getting Supervisor Competency Certificate and

permit as follows:—

(a) Those who pass the examination and secure

above 130 marks and below 180—‘‘All Low

Voltage Installations and Medium Voltage

Installations upto 25 kW”

(b) Those who pass the examination and secure marks

above 180—‘‘All Low Voltage Installations and

Medium Voltage Installations upto 50kW”.

(ii) Application for enhancing the scope of the

Electrical Supervisor permits will be considered

only after one year from the date of issue of the

permits and Competency.

266