Electrical Single Line Diagrams, Read & Understand

Course Title:

Mastering Single Line Diagram:

Covering Low Voltage AC, Low Voltage DC, Medium Voltage & High Voltage Single Line Diagrams.

Course Details:

Welcome to the course of “Single Line Diagram”.  In power engineering, a single-line diagram (SLD), also sometimes called one-line diagram, is a symbolic representation of a three-phase electric power system.

The one-line diagram has its largest application in power flow studies. Electrical elements such as circuit breakers, transformers, capacitors, bus bars, and conductors are shown by standardized schematic symbols. Instead of representing each of three phases with a separate line or terminal, only one conductor is represented.

Whenever it comes to start new project, define scope of work, Single line diagram is always the most important document to consider & prepare.  Furthermore single line diagram is also required to prepare shutdown / maintenance method statement.

Following topics are covered in this training:

Introduction to Single Line Diagram

Three Line Diagram

What is difference between single line and three line diagram

How to represent different element in Single line Vs three line diagram

Components of Single Line Diagram, we will see how these components are shown in drawings and how these components actually looks like.

Circuit Breaker

Isolator

Earth Switch

Power Transformer

Voltage Transformer

Current Transformer

Lighting Arrestor

Auxiliary Transformer

Mimic

Control Cubicle

Cable Compartment

Surge counter

Busbar

Local / Remote Control

High Speed Earth Switch

Three Position Switch

MV CB with draw out mechanism

Introduction to interlocking, Isolator & Circuit Breaker, Isolator and earth Switch, Bus bar isolator and busbar earth Switch

Cable Sealing End

SF6 to air bushing

NGR

Start point earthing  through resistor / solidly earth

Continuous and short circuit rating of equipment

Understanding ANSI codes

Current Transformer Polarity

Current Transformer Cores

Protection and metering cores of current transformer

Why Current transformer secondary must of shorted for all times

Protection and metering classes of instrument transformers

What will happened if current transformer is connected with wrong polarity.

Metal Enclosed and Metal Clad Switch Gear

Synchronizing

SLD for wind power plant

Ring Main Units

Connections of wind turbines to loops

Zigzag transformer and why zigzag transformer is used

Why neutral point of star connected transformer is grounded

Incoming and outgoing feeder philosophy

Percentage impedance of transformer and its relationship with tap changer

Review ACDB Single line Diagram with interlocking

Review ACDB Single line Diagram with interlocking

Review 132/11kV Single bus Single Breaker Scheme Single line diagram

Review 132/11kV Double bus Single Breaker Scheme Single line diagram

Relay and metering SLD

Regards

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