King Abdul Aziz University College of Engineering Electrical and Computer Department

1
King Abdul Aziz University College of
Engineering Electrical and Computer Department

• EE 454
• SWITCHG. PROT. OF PWR. SYS.
• Lectures Book
• Dr. ABDULRAHMAN ALMASOUD

2
Function Of Industrial Switchgear

• Foreword
• Purpose And Types

3
Switchgear Protection

• Lecture 2
• System and substation layout
• System layout
• I- radial feeder.
• II- parallel feeder.
• III- ring system.
• Iv- combination of the past three kinds.

4
(No Transcript)
5
Substation layout

• Substation layout
• Substations usually different in size,
  construction, cost and complexity according to
  voltage, location and function.
• The common feature they have is marshalling of
  all the associated circuits, through CB, switches
  on to bus bar as shown Fig (1-2-2A).
• (From Protection Relaying by Blackburn Page 338)
• 1-Single bus single breaker
  Fig (10.1)
• 2-Double bus with bus tie single breaker
  Fig (10.2)
• 3-Main transfer bus single breaker
  Fig (10.3)
• 4-Double bus single breaker
  Fig (10.4)
• 5-Double bus Double breaker
  Fig (10.5)
• 6-Ring bus
  Fig (10.6)
• 7-Breaker and a half bus
  Fig (10.7)
• 8-Bus and transformer single breaker
  Fig (10.8)

6
(No Transcript)
7
(No Transcript)
8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
Function of Substation

• Introduction

14
(No Transcript)
15
(No Transcript)
16
Functions of Substation

• Voltage Transformer function 1
• Circuit Switching function 2
• Voltage Regulation function 3
• VAR Control function 4
• System Protection function 5

17
Design Considerations

• Safety
• Simplicity
• Reliability
• Maintenance
• Flexibility

18
Radial Systems

• Introduction
• Simple Radial Systems
• Expanded Radial Systems
• Single-Ended Unit Substations

19
Radial SystemsSimple And Expanded Radial Systems
20
Radial SystemsSingle-Ended Unit Substations
21
Loop Systems

• Primary Loop Systems
• Secondary Loop Systems

22
Loop SystemsPrimary Loop Systems
23
(No Transcript)
24
Selective Systems -

• Primary selective system

25

• Secondary Selective System -