7 EE (Elective)
ELECTRICAL INSTALLATION DESIGN UNIT 1: Load forecasting, regression analysis, numerical based on linear and exponential trends, Electrical installation for domestic, commercial and industrial consumers, calculation of connected load, selection of transformers, switchgears, cables and wires, single line diagram, special provisions for high rise buildings (IER-50-A), earthing requirements, megger and earth tests, use of earth leakage circuit breakers (special reference to be given to IER 2 (i, n, o, p, v, aa, aaa, aq, aqq, ar, av). UNIT 2: Cables: PVC and XLPE cables, their construction in brief, current ratings, specifications, derating factors, megger and continuity test. Overhead distribution lines upto 33 kV, Line apparatus and basic construction, clearances, selection of AAC and ACSR conductors, voltage drop calculations, Selection of Insulators, earthing requirements. (Special reference to be given to IER 77, 79, 80, 81, 87, 89, 90, 91, 92) UNIT 3: Illumination Design: Definitions, polar curves, simple calculations, working principles of fluorescent, sodium vapour and mercury vapour lamps, Capacitors and power factor improvement: Determination of rating and location of capacitors, calculation of payback period for additional capacitors. UNIT 4: Substations: Single line diagram, plan, elevation and clearances for 11 kV pole mounted, 11 kV plinth mounted (upto 1000 kVA and above 1000 kVA), 33 kV (upto 2500 kVA and above 2500 kVA) substations. Single line diagram for substation with two transformers in parallel, specifications of isolators, lightening arrestors, horn gap fuses, D.O. fuses, circuit breakers, instrument transformers, power transformers, LV HRC fuses, LV circuit breakers, (Special reference to be given to IER 31, 33, 35, 43, 44, 47, 48, 50, 51, 54, 58, 64, 64A, 67 and IS3043) UNIT 5: Determination of fault levels of various locations in substation, use of current limiting reactors, philosophy of protective relaying, overcurrent, earth fault, REF protection, earth leakage protection, OTI, WTI, Buchholz relays, Fire fighting equipments, restoration of a person affected by electric shock, Earthing: types, measurement of earth resistance. UNIT 6: Site testing of transformers (Visual, pre-commissioning tests like megger, magnetic balance, turns ratio), testing of oil, operational test for Buccholz, OTI, WTI, alarm and trip functions.
Books: 1. 2. 3. 4. 5. 6.
Pabla- Electric Power Distribution Systems Soni, Gupta, Bhatnagar – Electric Power S. Rao – Electrical Substation Wadhawa – Electrical Engineering handbook. Jain, Bajaj - Electrical Installation Design IER (Latest edition)
