Siemens - Basics Of Control Components WW.pdf

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Basics of
Control Components
Table of Contents
Introduction ...............................................................................2
Electrical Symbols ....................................................................6
Line Diagrams ........................................................................16
Overload Protection ................................................................22
Overload Relays .....................................................................26
Manual Control .......................................................................35
Magnetic Contactors and Starters ..........................................41
Contactor and Starter Ratings ................................................47
Class 14 NEMA Starters with Bimetal Overload Relays .........50
Class 14 ESP100 Starters ......................................................51
SIRIUS Type 3R Starters........................................................52
Multi-Speed Starters ...............................................................55
Reversing Starters ..................................................................58
Reduced-Voltage Starting.......................................................60
SIRIUS Soft Starters...............................................................65
Lighting and Heating Contactors ............................................67
Pilot Devices ...........................................................................70
Control Transformers ..............................................................81
Control Relays ........................................................................82
Solid-State Switching Devices ................................................88
Monitoring Relays ...................................................................90
Time Relays ............................................................................91
Terminal Blocks and Supplementary Protectors .....................96
LOGO! Logic Module ..............................................................98
Fastbus Busbar Adapter System ..........................................100
Review Answers ...................................................................103
Final Exam............................................................................104
1
Introduction
Welcome to another course in the STEP series,
Siemens
Technical Education Program,
designed to prepare our
distributors to sell Siemens Energy & Automation products more
effectively. This course covers
Basics of Control Components
and related products.
Upon completion of Basics of Control Components you will be
able to:
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State the purpose and general principles of control
components and circuits
State the difference between manual and automatic control
operation
Identify various symbols which represent control
components
Read a basic line diagram
Describe the construction and operating principles of
manual starters
Describe the construction and operating principles of
magnetic contactors and magnetic motor starters
Identify various manual starters and magnetic motor
starters, and describe their operation in a control circuit
Explain the need for motor overload protection
State the need for reduced-voltage motor starting
Describe typical motor starting methods
2
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Describe the construction and operating principles of
lighting and heating contactors
Describe the operating principles of control relays
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This knowledge will help you better understand customer
applications. In addition, you will be better able to describe
products to customers and determine important differences
between products. You should complete
Basics of Electricity
before attempting
Basics of Control Components.
An
understanding of many of the concepts covered in
Basics of
Electricity
is required for
Basics of Control Components.
If you are an employee of a Siemens Energy & Automation
authorized distributor, fill out the final exam tear-out card and
mail in the card. We will mail you a certificate of completion if
you score a passing grade. Good luck with your efforts.
Underwriters Laboratories Inc. is a registered trademark of
Underwriters Laboratories Inc., Northbrook, IL 60062. The
abbreviation “UL” shall be understood to mean Underwriters
Laboratories Inc.
3
Control Circuits
Control
Control,
as applied to control circuits, is a broad term that
means anything from a simple toggle switch to a complex
system of components (which may include relays, contactors,
timers, switches, and indicating lights). Every electrical circuit
for light or power has control elements. One example of a
simple control circuit is a light switch that is used to turn lights
on and off.
Of course, there are many other devices and equipment
systems in industrial applications. Motor control, for example,
can be used to start and stop a motor and to protect the motor,
associated machinery, and personnel. In addition, motor
controllers might also be used for reversing, changing speed,
jogging, sequencing, and pilot-light indication. Control circuits
can be complex, accomplishing high degrees of automatic,
precise machine operation.
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