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Basics on Switchboards & their General Arrangement drawings

Name: Basics on Switchboards & their General Arrangement drawings
Rating: 4.6 (587 reviews)

MCC Electrical Panel - Basics & considerations for panel layout (GA) drawings for Switchboard / control panel

Created byIconic Educademy, Iconic Techno Solution

Last updated 10/2022

English

What you'll learn

Basics about Switchboards / Control Panels
Basics about GA (General Arrangement) Drawings for Switchboard - Read and understand GA's
Various Feeder types - Incomer / Outgoing / Transformer / Bus PT etc.
Key switchgears that affect the module / feeder sizing or feeder placement - Like ACB's, MCCB's , Door mounted components etc.
Ingress Protection
Learn about various IP's applicable for MCC's & PCC's
How IP protection impact GA drawings
Form of Segregation
Various Panel design / Executions
Understand Diversity Factor
As a designer, students will be able to create technically correct general arrangement drawings
As consultants, students will be able to evaluate / read and understand general arrangement drawings
It can help the contractors to decide the control room size based on the GA layout of panels
Optimize the system / general arrangement drawings

Course content

6 sections • 26 lectures • 2h 2m total length

Introduction and Course Flow3:00
Introduction to the course : Basics on Switchboards & Their General Arrangement drawings.
What you will learn from this course
Flow of the course & Topics covered.
Basic Details about GA4:08
Welcome to the very first lecture on Basics of GA. In this lecture we will learn about :
Understanding what a GA is?
GA drawings wrt Switchboards
Importance of GA drawings
Details shared in a GA drawing
Getting to know some technical terms in reference to GA drawings.
What details can one get from the GA drawing?
Contd. Basic Details about GA5:46
CONTD. BASIC DETAILS ON GA
In this lecture we learn:
When these drawings need to be developed in the switchboard manufacturing process?
Learn briefly about the different part of manufacturing phases
Difference between tender purpose GA and engineering phase GA
Importance and role played by tender purpose GA
Importance and role played by engineering/ design phase GA
On what basis is this GA drawing created?
Details given in SLD & technical specification document
And finally how these details affect the GA drawing
Getting aware of technical terms.
More on GA drawings
Various Types of GA Drawings4:22
We have learnt :
• What is a GA
• Why is it required
• When is it developed or drawn?
• What inputs are required to create GA drawings
• And Details that are conveyed by GA drawings

Now we will discuss the variations in GA drawings:
Based on the application or load requirement
Based on the depiction of the switchboard
GA drawing Views
Building Blocks of GA Drawings7:35
In this lecture we will learn about building blocks of GA drawings or Switchboards or Electrical panels or control panels.
We will learn about MCC's / PCC's:
• what are the various parts or
• what constitutes a complete general arrangement drawing of the switchboard?
Feeder area
Busbar area
Learn what a busbar is?
Difference between busbar and cable
Why busbar is used in electrical panels
Main busbar
Vertical busbar
Buslinks
Building Blocks of GA Drawings
Contd. Building Blocks of GA Drawings.4:42
We will continue our study of building blocks of Switchboards or GA drawings
Cable area - Cable Alley/ Cable chamber
Foundation plan
Busducts
The area which houses incoming & outgoing cable connections from terminals to th
Contd. Building Blocks of GA Drawing4:48
Further continuing our study on building blocks of Switchboard or GA drawings:
IP protection
Ventilation arrangement
Access to the panel – front / rear
Forms of segregations

Basic Details on Feeder2:50
Welcome to this section wherein we will learn
Basic details about feeders
Different feeder types
Consideration required for optimum arrangement of feeders in the feeder area.

In this lecture we will start with basic details of feeders.
What a feeder is?
Other terms used for feeder
Introduction to feeder types.

We shall touch up feeder types in the subsequent lecture.
Basic Details on Feeder
Types of Feeder5:53
In this lecture we will study about the different feeder types:
Incomer Feeder
Bus - Coupler Feeder
Bus - PT Feeder
Control - Trafo Feeder
Motor Outgoing feeders
Power Outgoing feeders
Types of Feeder
Contd. Types of Feeder5:24
Continuing our study on feeder types, we will now learn about
Capacitor feeders
Heater feeder
Marshalling feeders
ATS (automatic transfer switch) feeder
Contd. Types of Feeder
Basics on Feeder Sizing5:14
After having understood basics of feeders and their various types, we will learn about Module sizing in this lecture.
What module sizing implies?
Impact of cable size and number of cables on Module sizing & placement
Impact of door mounted components
To-scale drawings for module sizing
How module sizing is arrived at in daily working at manufacturing companies?
Disadvantage of having lot of variations in Module sizing
Module size multiplier
Basics on Feeder Sizing
Basics on Feeder Placement5:31
In this lecture we will learn about : Logic of feeder placement
Considerations for feeder placement
Based on rating and size feeder
Vertical dropper rating
Glanding & Cabling space
Cable size
Cable entry location
Cable termination
Meaning of cable entry
Basics on Feeder Placement

Basic Details on ACB3:33
In the last section we covered basics on different feeder types and consideration for placing of feeders. We also touched upon the considerations for module sizing wherein we mentioned that there should be sufficient enough to place all the components in a systematic manner.
Hence, the physical size of the components in the compartment, and, the necessary spacing between the components, play a major role in the module sizing and in turn, in feeder placement.

So, let us discuss few major switchgear, with regards the mounting, fixing, operation, maintenance aspects i.e. the mechanical aspects of the switchgear.
In this section we will learn about Air circuit breakers (ACB's):
Rating
Size
Mounting Arrangement
Cable Termination
Busduct Entry
Basic Details on ACB
Basic on Placement & Sizing of MCCB/ FSU/ Isolator Feeder.5:45
In this lecture we will study about MCCB’s, FSU's & Isolators:
Rating Range
Mounting Arrangement
Orientation
Pole
Termination Arrangement
Alignment with operating handle
Aesthetics of Switchboards
Basic on Placement & Sizing of MCCB/ FSU/ Isolator Feeder
Basics on placement on Contactor and Other plate mounted components.4:43
In this lecture we will now take up Contactors & other plate mounted components, such as:
Power and auxiliary contactor
Overload relay
MCB
Soft starters
VFD
Power supply module
Control fuse and other such components.

Mounting Sequence
Maintenance Aspect
Testing
Din rail mounting
Basics on placement on Contactor and Other plate mounted components.
Basics on placement of door mounted component and their impact on feeder sizing5:21
In this lecture we shall learn about the mounting and placement consideration for door mounted components, such as:
Indication lamps
Push buttons
Meters
Protection relays
Selector switches
Door drive handle
We will learn
Why these components are mounted on the door
Mounting Arrangement
Clearance between components
Fouling of components
How sizing can affect placement
Door strength
Basics on placement of door mounted component and their impact on feeder sizing
Basic on placement and mounting consideration for CT's & PT's3:12
Basics on placement of CT's & PT's
Basics on placement of Heat generating equipments & Consideration for interlocks3:39
Consideration for placement & mounting of HEAT GENERATING equipments such as
VARIABLE FREQUENCY DRIVE
TRANSFORMERS
SOFT STARTER
CAPACITORS
REACTORS etc.

Heat dissipation - ventilation arrangement
Required clearance
Recommended cooling arrangement

How Interlocks affect feeder placement
Mechanical Interlocking
Basics on placement of feeders - Heat generating equipments

IP protection4:52
In this lecture we will learn
What is IP protection?
Why is it important?
How is it important for Electrical Switchboards?
What is the significance of the 2 digits in IP rating?
IP's Applicable for Electrical Switchboards - Motor Control Centers and Power control centers
What various IP's mean:
IP 42
IP 54
IP 55
IP 65
IP protection
How does IP protection impact GA drawings3:17
Now that we are well aware of what IP means, let us see their impact on the switchboard GA drawing.
Based on what IP is specified?
Indoor / Outdoor Installation of Electrical Switchboards
How Ventilation arrangement is impacted by the IP rating?
Main factors on which IP rating depends
IP protection Impact on switchboard
Forms of Segregation5:52
In this lecture we will learn
What form of segregation is?
How can it be achieved?
Why segregation is required ?
What are the various forms of segregation?
Forms of Segregation

Basics of panel design5:49
In the previous sections, we have learnt about the various area that help form the complete GA drawing and subsequently in the building of the electrical switchboard.

These are namely, the feeder area, main busbar chamber, cable alley, vertical dropper etc.

Let us now understand these from the construction point of view.
Hence we will learn about the various ‘Design’ that are possible in Form 3 & form 4 types of panels.
Single unit panels
Multi unit panels
On what basis is a particular design of panel selected?
Full height feeders
Basics on panel design
cont. basic on panel design4:42
We will be discussing SUP designs in detail here.
Why SUP design is used?
In SUP design we will see
Single Tier design
Two Tier design
Three Tier design

On what basis is it decided which tier design should be used?
Criteria for deciding the panel design
Dimensions of panel
cont. basic on panel design

Some other considerations like Diversity factor & Vertical dropper sizing4:05
Now that we have a pretty good understanding of the various details that help us to design a GA drawing. We have already studied:
Building blocks of GA, their importance and role played by them
Switchgears & role played by them w.r.t. feeder sizing
Considerations for feeder placement
IP protection
Forms of segregation
Panel designs

In this lecture we will take up few of the remaining topics such as the vertical dropper sizing & diversity factor
How do we decide the rating of the vertical dropper?
Concept of diversity factor
Vertical dropper sizing and diversity factor
Practicing designing GA drawings for SUP5:00
In this lecture we will try to design a simple GA drawing consisting of SUP's or ACB panels.
We will see the various possibilities
Why a certain design - single tier or two tier design is selected?
Practicing designing GA drawings for MUP3:45
In this lecture we will try to design a simple GA drawing consisting of MUP'S or Non-ACB panels.
We will see the various possibilities
Why a certain design is selected?
How verticals are estimated and how feeders are placed in the most optimum manner.

Requirements

Should have a basic knowledge or degree in Electrical Engineering - B tech, B.E., Diploma or any similar relevant educational background

Description

Electrical Control panel - Basics & considerations for general arrangement (GA) drawings for Switchboard / control panel /Electrical Panels

Electrical Switchboard / control panel design

Basics on Switchboards & their General Arrangement drawings is a basic course to start learning about switchboard or their general arrangement drawings. We have covered various concepts that are required to design general arrangement drawings for low voltage switchboards. We start with very basics and eventually build on it.

This course is even suitable for students who want to learn about the switchboards or control panels.

Some of the topics that you will come across are:

1) Basic details on Switchboards & GA Drawings

What is GA drawing?
Where is it used ?
Why are electrical panel layout drawings needed?
What are the inputs required to draw a GA drawing?
Variations in GA drawings
Basic Building blocks of a Switchboard or GA drawings.

2) Feeders / Modules/ Functional Units

Basics on feeders / modules /functional units.
Different feeder types : Incomer / Bus-coupler / Outgoings / Motor Feeders etc.
Basic considerations for feeder sizing / module sizing
Basic considerations for feeder placement

3) Switchgear - ·ACB's, MCCB's, Other plate mounted components, door mounted components, Heat generating equipments etc.

How they affect the feeder sizing and, in turn, affect the placement in Switchboards
Consideration for din-rail mounted components
Consideration for mounting and placement of CT's & PT's
Heat generating equipments
How interlocks affect feeder placement

4) IP Protection

What is IP protection?
Why is it important?
How is it important for Electrical Switchboards?
What is the significance of the 2 digits in IP rating?
IP's Applicable for Electrical Switchboards - Motor Control Centers and Power control centers
What various IP's mean: IP 42, IP 54, IP 55 etc.
How IP protection impacts ventilation arrangement

5) Form of Segregation

What form of segregation is?
Why segregation is required ?
What are the various forms of segregation?

6) Different variations of panel design and how they define the GA drawing

Single unit panels
Multi unit panels
On what basis is a particular design of panel selected?
Full height feeders

7) Vertical dropper rating and sizing & diversity factor. And lastly Practice Exercise

How vertical dropper rating is decided.
What is diversity factor
SUP's & MUP's - Various possibilities
Why a certain design is selected
Total vertical count
Optimum feeder placement

Who this course is for:

Final year engineering electrical / mechanical - B Tech, B.E., Diploma, ITI
Anyone planning to work in LV/ MV Switchboard Manufacturing Companies
Students who want to pursue a career in electrical automation companies
Planning career in electrical contracting and consultant companies
Who want to understand various concepts about mechanical assembly, arrangement of feeders, forms for segregation.

Basics on Switchboards & their General Arrangement drawings

What you'll learn

Explore related topics

Course content

Introduction and Concept Building7 lectures • 34min

Feeder Placement & Understanding Module Sizing5 lectures • 25min

Mounting and Placement considerations for switchgears6 lectures • 26min

IP protection and Forms of Segregation3 lectures • 14min

Panel Designs2 lectures • 11min

Other considerations and Practice3 lectures • 13min

Requirements

Description

Who this course is for: