Electrical Distribution System Pdf Notes – EDS Notes | Free Lecture Notes download


Here you can download the free lecture Notes of Electrical Distribution System Pdf Notes – EDS Notes Pdf materials with multiple file links to download. The Electrical Distribution System Notes Pdf – EDS Pdf Notes book starts with the topics covering Introduction to distribution systems,  Radial and loop types of primary feeders, Rating of distribution substation, Derivation for voltage drop and power loss in lines,  Objectives of distribution system protection, General coordination procedure, Different types of power capacitors, Etc.

Electrical Distribution Systems Pdf Notes - EDS Notes Pdf - Electrical Distribution Systems Notes - EDS notes pdf

Electrical Distribution System Pdf Notes – EDS Notes Pdf

EDS notes pdf file to download are listed below please check it

Complete Notes

Link:Complete Notes

Note :- These notes are according to the R09 Syllabus book of JNTU.In R13 and R15,8-units of R09 syllabus are combined into 5-units in R13 and R15 syllabus. If you have any doubts please refer to the JNTU Syllabus Book.

UNIT – 1

Introduction to distribution systems, Load modelling and characteristics. Coincidence factor, contribution factor loss factor – Relationship between the load factor and loss factor. Classification of loads (Residential, commercial, Agricultural and Industrial) and their characteristics.


Design Considerations of Distribution Feeders: Radial and loop types of primary feeders, voltage levels, feeder loading; basic design practice of the secondary distribution system.


Location of Substations: Rating of distribution substation, service area within primary feeders. Benefits derived through optimal location of substations


Voltage drop and power-loss calculations: Derivation for voltage drop and power loss in lines, manual methods of solution for radial networks, three phase balanced primary lines.

Electrical Distribution System Notes Pdf – EDS Pdf Notes


Objectives of distribution system protection, types of common faults and procedure for fault calculations. Protective Devices: Principle of operation of Fuses, Circuit Reclosures, line sectionalizes, and circuit breakers


Coordination of Protective Devices: General coordination procedure.


Capacitive compensation for power-factor control. Different types of power capacitors, shunt and series capacitors, effect of shunt capacitors (Fixed and switched), Power factor correction, capacitor allocation – Economic justification – Procedure to determine the best capacitor location.


Voltage Control: Equipment for voltage control, effect of series capacitors, effect of AVB/AVR, line drop compensation.


1. Electrical Power Distribution and Automation by S.Sivanagaraju, V.Sankar, Dhanpat Rai & Co, 2006
2. Electric Power Distribution – by A.S. Pabla, Tata Mc Graw-hill Publishing company, 4th edition, 1997.

Text books

1. “Electric Power Distribution system, Engineering” – by Turan Gonen, CRC Press.
2. Electrical Power Distribution Systems – by V Kama Raju Tata Mc Graw-hill Publishing company, 2nd edition, 2010.

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Frequently Asked Questions

Q1: What are the different parts of distribution networks?

A1: Distribution networks take up the Distribution of electric power. Distribution networks consist of following parts:

  1. Distribution substation
  2. Primary distribution feeder
  3. Distribution Transformer
  4. Distributors
  5. Service mains

Q2: What are the factors electrical power distribution depends upon?

A2: Electrical power distribution system depends upon the following factors.

  1. System’s Maximum Demand: If the system’s maximum is more, then more numbers of feeders feed the ring.
  2. Ring main distributor’s Total Length: To compensate the voltage drop in the lone, if the length is more, more feeders to be connected to the ring system.
  3. Required Regulation of voltage: The number of feeders connected to the ring depends upon the permissible allowable voltage drop of the line.

Q3: What is a feeder, distributor and service maim?

A3: A conductor which connects the localized generation station or substation to the area where power needs to be distributed is called feeder.

A conductor through which tappings are taken for the supply to the customers or consumers is called A distributor. The tappings are taken along its length at various places. Hence the current through a distributor is not constant.

A small cable that connects the distributor to the consumers’ terminals is called a service maim.

Q4: What are the factors that are considered in the design of a distribution system?

A4: A distribution system must satisfy and meet customer’s needs from smallest to largest. To achieve this agenda, requirements of electricity users must be anticipated. Factors that are considered in the design of a distribution system include the following:

  • Type of structure depends on the usages required by the customer and type of utilization equipment.
  • Current utilization and future needs
  • Structure’s projected life
  • Structure’s flexibility
  • Different requirements of the load which includes maximum demand and time intervals for maximum demand.
  • Location of load equipment service entrance
  • Distribution equipment, Switchgear and panels
  • Type of installation methods that are used in the design

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