Kerala Gazette, No. 51, Part Part III, 19 December 2023

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Regn.No. KERBIL/2012/45073

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മകരള സരകാര

GOVERNMENT OF KERALA

മകരള ഗസറ് KERALA GAZETTE

ആധികാരികാേയി ്പസിദറ്റപടുതുനത

PUBLISHED BY AUTHORITY

ചചാവ, 2023 ഡിസംബര 19

Tuesday, 19th December 2023

1199 ധനു 3

1945 അ്ഗഹായനം 28

3rd Dhanu 1199

28th Agrahayana 1945

വാലം 12

നരേ 51

No.

Vol. XII

Part III

Electrical Inspectorate Department

©

മകരള സരകാര

GOVERNMENT OF KERALA

2023This is a digitally signed Gazette. Authenticity may be verified through https://compose.kerala.gov.in/

https://samraksha.ceikerala.gov.in

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DETAILS OF ELECTRICAL SUPERVISOR 'B' GRADE EXAMINATION-2023

PART-1

PAPER-1

Basic Electrical Engineering–Theory

Maximum Marks-100.

Time-3 Hours.

1. Principles of Electricity:—Electric pressure, current and resistance, Ohm's Law, Kirchoffs 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.-Faradays and Lenzs Laws and Flemings Left hand rule, Flemings 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–Dielectric-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. Transformers:—Single phase and 3 phase transformers-Constructional features Transformation ratio-Voltage and current equation-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 transformer.

7. Motors:—(a) A.C.Motors-Rotating magnetic field, single phase induction motores-Different types- Working Principle of 3 phase induction motors- Squirrel case 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 or accumulators and their installations. Lead acid cells, Nickel iron and 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-Powerloss-design of ground conductor-Lightening arrestors.

11. Constructional feature of U.G.Cables:—Fault location-Murray and varley loop tests-Charging currents.

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.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. -Conductors. 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 disturbances. 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. Clearance:—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-Recommended Values of insulation resistance-Earth resistance measurements. Desired values-Continuity 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 Voice

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 up to 25kW"

(b) Those who pass the examination and secure marks above 180-"All Low Voltage Installations and Medium Voltage installations up to 50kW"

(ii) Application for enhancing the scope of the Electrical Supervisor Permits will be considered only after one year from the date or issue of the permits and competency.

____________________________________________________________________________________________________________________________ PUBLISHED BY THE SUPERINTENDENT OF GOVERNMENT PRESSES AT THE GOVERNMENT CENTRAL PRESS, THIRUVANANTHAPURAM, 2023This is a digitally signed Gazette. Authenticity may be verified through https://compose.kerala.gov.in/