# TSSPDCL Sub Engineer Syllabus PDF

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## TSSPDCL Sub Engineer Syllabus 2022 PDF

SYLLABUS FOR SUB-ENGINEER (ELECTRICAL) IN TSTRANSCO SCHEME OF EXAMINATION
Paper
Subject
Duration
(Minutes)
Maximum
Marks
No. of Questions
80 Questions
(Diploma in Electrical
Engineering: 65 Questions and
General Awareness and
Numerical Ability: 15 Questions).
Diploma in Electrical
Engineering & General
Awareness and
Numerical Ability

65 Marks.
Section-A:
Diploma in Electrical Engineering.
I ELECTRICAL MACHINES:
TRANSFORMERS: Emf equation of single phase transformer, operation of transformer on load, equivalent circuit, vector diagram, open-circuit and short-circuit tests, voltage regulation, losses and efficiency, all-day efficiency, parallel operation of single-phase transformers with equal voltage ratios. Voltage and current relations for three-phase transformer connections. Principle of operation of auto-transformer. Cooling of power transformer, Operation of Buchhloz’s relay.

D.C. GENERATORS AND MOTORS: Expression for emi equation of D.C.Generator, armature windings, armature reaction types of generators, characteristics. Torque equation of D.C.Motor, characteristics, speed control,
starters, losses and efficiency. Testing of D.C. Machines THREE-PHASE INDUCTION MOTORS: Constructional aspects of cage and wound rotor types of induction motors, expression for torque, torque-slip characteristics, full load torque, starting torque and maximum torque, effects of variation of rotor resistance; losses and efficiency, different starting methods, speed control methods. SINGLE-PHASE INDUCTION MOTORS AND

COMMUTATOR MOTORS:
Constructional features and operation of single-phase induction motors: split phase, capacitor and shaded pole types. Principle of operation of A.C. series motor, universal motor, Schrage motor.

II. SWITCHGEAR AND PROTECTION:
FAULTS AND SWITCHING APPARATUS: Short-circuit calculations: fuses and isolators; circuit breakers: theory of arc interruption and different types of oil circuit breakers; lightning arresters and their selection and location. PROTECTIVE RELAYING: Basic requirements of protective relaying, primary and back-up protection; cassification of electromagnetic relays and their principles of operation time current characteristic curves: induction type over-current relay, distance relays, Merz price protection, differential protection of transformers, bus bar protection.