Control of Machines.

By: Bhattacharya, S.KContributor(s): Singh, BrijinderMaterial type: TextTextPublisher: Daryaganj : New Age International, 2006Copyright date: ©2006Edition: 2nd edDescription: 1 online resource (355 pages)Content type: text Media type: computer Carrier type: online resourceISBN: 9788122424409Subject(s): Electric controllers | Electric machineryGenre/Form: Electronic books.Additional physical formats: Print version:: Control of MachinesDDC classification: 621.3136 LOC classification: TK2851 -- .B43 2006ebOnline resources: Click to View
Contents:
Cover -- Preface -- Contents -- Chapter 1 Introduction to Control of Machines -- 1.1 General Idea of Controls -- 1.2 Disadvantages of Manual Control -- 1.3 Introduction to Magnetic Control -- 1.4 Advantages of Magnetic Control -- 1.5 Semi-Automatic and Automatic Control of Modern Machinery -- 1.6 Development of Control Circuit -- 1.6.1 Development of Two-wire and Three-wire Control -- 1.6.2 Remote Control Operation of a Motor -- 1.6.3 Interlocking of Drives -- Chapter 2 Control Circuit Components -- 2.1 Introduction -- 2.2 Fuses, Switches and Fuse Switch Units -- 2.3 Moulded Case Circuit Breaker and Miniature Circuit Breaker (MCCB & MCB) -- 2.4 Contactors -- 2.4.1 Solenoid Type Contactor -- 2.4.2 Clapper Type Contactor -- 2.4.3 Lock-out Type Contactor -- 2.4.4 Inductive Accelerating Contactors -- 2.5 Contactor Ratings -- 2.6 Relays -- 2.6.1 Voltage Relays -- 2.6.2 D.C. Series Current Relay -- 2.6.3 Frequency Responsive Relay -- 2.6.4 Latching Relays -- 2.7 Overload Relays -- 2.7.1 Bimetallic Thermal Overload Relay -- 2.7.2 Ratchet Type Eutectic Alloy Relay -- 2.7.3 Magnetic Dash Pot Oil Filled Relay -- 2.8 Time Delay Relays (Timers) -- 2.8.1 Thermal Timer -- 2.8.2 Pneumatic Timer -- 2.8.3 Motor Driven Timers -- 2.8.4 Electronic Timer -- 2.9 Phase Failure Relay (Single Phasing Preventer) -- 2.10 Push Button Switches -- 2.11 Selector Switches -- 2.12 Drum Switches -- 2.13 Limit Switches -- 2.13.1 A Simple Limit Switch -- 2.13.2 Rotary Cam Type Limit Switches -- 2.13.3 Heavy Duty Limit Switches -- 2.13.4 Speed Actuating Sensing Switches -- 2.14 Solenoid Valves -- 2.15 Pressure Switches -- 2.16 Pressure Transducer -- 2.17 Temperature Switches (Thermostats) -- 2.18 Float Switch -- 2.19 Control Transformer -- 2.20 Symbols for Various Components -- 2.21 Control Diagrams -- Chapter 3 Starters for 3-Phase Squirrel Cage Motor -- 3.1 Introduction.
3.1.1 Motor Current at Start and During Acceleration -- 3.1.2 No-load Speed and Final Speed of Motor -- 3.1.3 Starting of Motor -- 3.2 Primary Resistor Type Starters -- 3.2.1 Manual Primary Resistor Type Starter -- 3.2.2 Semi-automatic Stepless Resistance Starter -- 3.2.3 Automatic Primary Resistor Type Starter -- 3.3 Increment Resistance Starter -- 3.4 Line-Reactor Reduced Voltage Starter -- 3.5. Auto-Transformer Reduced Voltage Starters -- 3.5.1 Manual Auto-transformer Starter -- 3.5.2 Automatic Auto-transformer Starter (Open Circuit Transition) -- 3.5.3 Auto-Transformer Voltage Starter (Closed Circuit Transition) -- 3.6 Part Winding Motor Starter -- 3.6.1 Two Step Starting -- 3.6.2 Three Step Starting -- 3.7 Star-Delta Starter -- 3.7.1 Manual Star-delta Starter -- 3.7.2 Push-button Operated Manual Star-delta Starter -- 3.7.3 Semi-automatic Star-delta Starter -- 3.7.4 Automatic Star-delta Starter (Open Circuit Transition) -- 3.7.5 Automatic Star-delta Starter (Closed Circuit Transition) -- 3.8 Starters for Multi-Speed Motors -- 3.8.1 Starter for Two-Speed, Two Winding (Separate Winding) Motor -- 3.8.2 Two Speed One Winding (Consequent Pole) Motor Starter -- 3.9 Reversing the Direction of Rotation of Induction Motors -- 3.10 Plug Stopping of Motor -- 3.11 Dynamic Braking -- Chapter 4 Starters for Wound Rotor Induction Motors -- 4.1 Introduction -- 4.2 Motor Acceleration -- 4.3 Manual Face Plate Starter -- 4.4 Manual Starter Using Master Controllers -- 4.5 Automatic Control of Acceleration -- 4.5.1 Definite Time Limit Starter -- 4.5.2 Current Limit Acceleration Starter -- 4.5.3 Secondary Frequency Acceleration Starter -- Chapter 5 Starters for Direct Current Motors -- 5.1 Types of DC Motors and their Applications -- 5.1.1 Shunt Motor -- 5.1.2 Series Motor -- 5.1.3 Compound Motor -- 5.2 Principles of DC Motor Acceleration.
5.3 Manual Starters for DC Motors -- 5.3.1 Two-point Starter -- 5.3.2 Three-point Starter -- 5.3.3 Four-point Starter -- 5.4 Types of Starters for Automatic Acceleration -- 5.4.1 Direct-on-line Starter -- 5.4.2 Current Limit Acceleration Starters -- 5.4.3 Definite Timer Acceleration Starters -- 5.5 Reversing of DC Motors -- 5.6 Jogging Operation of Motor -- 5.7 Dynamic Breaking of Motor -- 5.8 Plugging Circuit for DC Motor -- Chapter 6 Control of Single Phase Motors -- 6.1 Types of Single Phase Motors -- 6.2 Universal Series Motors -- 6.2.1 Reversing Direction of Rotation of Universal Motor -- 6.2.2 Speed Control of Universal Motor -- 6.3 Shaded Pole Motor -- 6.4 Split Phase Motors -- 6.4.1 Standard Split Phase Motors -- 6.4.2 Capacitor Type Split Phase Motors -- 6.4.3 Starters for Capacitor Type Split Phase Motors -- 6.4.4 Starter for Two Value Capacitor Type Split-phase Motors -- 6.4.5 Starter for a Two Value Capacitor Motor Using a Current Relay and an AutoTransformer -- 6.4.6 Dynamic Breaking of Split Phase Motors -- 6.4.7 Plug Reversing of Capacitor Start Motors -- 6.4.8 Speed Control of Split Phase Motors -- 6.4.9 Speed Control of Permanent Split Capacitor Motors -- Chapter 7 Control of Synchronous Motors -- 7.1 Construction and Operation of a Synchronous Motor -- 7.2 Manual Push Button Synchronising Starter -- 7.3 Timed Semi-Automatic Synchronising -- 7.4 Automatic Starter Using Polarised Field Frequency Relay -- Chapter 8 Protection of Motors -- 8.1 Protection of AC Motors -- 8.2 Co-Ordination of Fuse, Over-Load Relay and Contactor/Circuit Breaker Operating Characteristics -- 8.3 Overload, Short Circuit, and Over-Temperature Protection -- 8.3.1 Overload and Short Circuit Protection -- 8.3.2 Over Temperature Protection -- 8.3.3 Under Voltage Protection -- 8.3.4 Phase Failure and Phase Reversal Protection -- 8.4 Protection of DC Motors.
8.4.1 Field Failure Protection Circuit for dc Shunt Motors -- 8.4.2 Field Acceleration Protection Circuit -- 8.4.3 Field Deceleration Protection Circuit -- Chapter 9 Industrial Control Circuits -- 9.1 Introduction -- 9.2 Planer Machine -- 9.3 Skip Hoist Control -- 9.4 Automatic Control for a Water Pump -- 9.5 Lifting Magnet -- 9.6 Control of Electrical Oven -- 9.7 Overhead Crane -- 9.8 Battery Trolley -- 9.9 Battery Operated Truck -- 9.10 Air Compressor -- 9.11 Walking Beam -- 9.12 Conveyor System -- 9.13 Elevator -- Chapter 10 Troubleshooting in Control Circuits -- 10.1 Introduction -- 10.2 Trouble Spots -- 10.2.1 Fuses -- 10.2.2 Loose Connections -- 10.2.3 Faulty Contacts -- 10.2.4 Incorrect Wire Marking -- 10.2.5 Combination Problems -- 10.2.6 Low Voltage -- 10.2.7 Grounding -- 10.2.8 Momentary Faults -- 10.2.9 Poor Maintenance -- 10.3 General Procedure for Troubleshooting -- Chapter 11 Static Control of Machines -- 11.1 Introduction -- 11.2 Advantages of Static Control over Magnetic Relay Control -- 11.3 Disadvantages of Static Control over Magnetic Relay Control -- 11.4 Explanation of Different Gates -- 11.4.1 AND Gate -- 11.4.2 OR Gate -- 11.4.3 NOT Gate or Inverter -- 11.4.4 NOR Gate -- 11.4.5 NAND Gate -- 11.4.6 Exclusive OR gate -- 11.5 Solid State Timer -- 11.6 Memory Elements (Off-Return Type) -- 11.6.1 Clocked RS Flip-Flop -- 11.6.2 JK Flip Flop -- 11.7 Retentive Memory Element -- 11.8 Development of Logic Circuits -- 11.9 Input Devices for Solid State Logic -- 11.9.1 Capacitive Switch Filters -- 11.9.2 Bounce Eliminators -- 11.9.3 Signal Converters -- 11.10 Output Devices for Solid State Logic -- 11.11 Solenoid Valve Operated Cylinder Piston Assembly -- 11.12 Control of Three Stage Air Conditioning System -- 11.13 Speed Control of Wound Rotor Induction Motor -- 11.14 Control of Planer Machine -- 11.15 Control of Three Conveyors.
11.16 Shift Register -- 11.17 Conveyor System Using a Shift Register -- 11.18 Counter -- 11.19 Decoder -- 11.20 Loading of Castings Into Annealing Furnace Using Decade Counter and Decoder -- 11.21 Mono Shot -- 11.22 Clock -- 11.23 Automatic Filling of Silos Using a Clock and a Monoshot -- 11.24 Down Counter -- 11.25 Encoder -- 11.26 Product Dispersion Conveyor System Using a Down-Counter, an Encoder, a Mono-Shot and a Timer -- Chapter 12 Programmable Logic Controller -- 12.1 Introduction -- 12.2 Input/Output Section -- 12.2.1 Fixed I/O -- 12.2.2 Modular I/O -- 12.3 Discrete Input Modules -- 12.3.1 AC Discrete Input Module -- 12.3.2 DC Discrete Input Module -- 12.4 Discrete Output Modules -- 12.4.1 AC Output Module -- 12.4.2 DC Output Modules -- 12.4.3 Rating of Output Modules -- 12.5 Analog I/O Modules -- 12.6 Safety Circuit -- 12.7 Processor Unit -- 12.7.1 Internal Self Diagnostic System -- 12.7.2 Memory Types -- 12.7.3 Input Image Table -- 12.7.4 Output Image Table -- 12.7.5 User Program Memory -- 12.7.6 Variable Data Memory -- 12.8 Programming Device -- 12.8.1 Dedicated Desktop Programmers -- 12.8.2 Hand-held Programmers -- 12.8.3 Computer Programmers -- 12.8.4 Advantages of Using Personal Computers for Programming -- 12.8.5 Disadvantages of Using Personal Computer for Programming a PLC -- 12.9 Fundamental PLC Programming -- 12.9.1 Introduction -- 12.9.2 Physical Components Versus Program Components -- 12.9.3 Examine ON Instruction -- 12.9.4 Examine OFF Instruction -- 12.9.5 Internal Relay Instruction -- 12.9.6 Latching Instruction -- 12.9.7 Output Instruction -- 12.9.8 Programming Stop Push-buttons -- 12.9.9 Logical Holding Instructions Versus Discrete Holding Contacts -- 12.9.10 Overload Contacts -- 12.9.11 Master Control Relay Instruction -- 12.9.12 Branch Open and Branch Close Instructions -- 12.9.13 Timer Instruction.
12.9.14 Counter Instruction.
Summary: Control of Machines is one of the most important functional areas for electrical and mechanical engineers working in industry. In this era of automation and control, every engineer has to acquaint himself on the design installation, and maintenance of control systems. This subject must find its place as a compulsory applied engineering subject in degree and diploma curriculum. Some progressive states and autonomous institutions have already introduced this subject in their curriculum. In this book, static control and programmable controllers have been included keeping in view the latest developments in modern industry. Relay and static control have been dealt with in details. Most of the control circuits included in this book have been taken from Indian industry. A chapter has been devoted to protection of motors and troubleshooting in control circuits.
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Cover -- Preface -- Contents -- Chapter 1 Introduction to Control of Machines -- 1.1 General Idea of Controls -- 1.2 Disadvantages of Manual Control -- 1.3 Introduction to Magnetic Control -- 1.4 Advantages of Magnetic Control -- 1.5 Semi-Automatic and Automatic Control of Modern Machinery -- 1.6 Development of Control Circuit -- 1.6.1 Development of Two-wire and Three-wire Control -- 1.6.2 Remote Control Operation of a Motor -- 1.6.3 Interlocking of Drives -- Chapter 2 Control Circuit Components -- 2.1 Introduction -- 2.2 Fuses, Switches and Fuse Switch Units -- 2.3 Moulded Case Circuit Breaker and Miniature Circuit Breaker (MCCB & MCB) -- 2.4 Contactors -- 2.4.1 Solenoid Type Contactor -- 2.4.2 Clapper Type Contactor -- 2.4.3 Lock-out Type Contactor -- 2.4.4 Inductive Accelerating Contactors -- 2.5 Contactor Ratings -- 2.6 Relays -- 2.6.1 Voltage Relays -- 2.6.2 D.C. Series Current Relay -- 2.6.3 Frequency Responsive Relay -- 2.6.4 Latching Relays -- 2.7 Overload Relays -- 2.7.1 Bimetallic Thermal Overload Relay -- 2.7.2 Ratchet Type Eutectic Alloy Relay -- 2.7.3 Magnetic Dash Pot Oil Filled Relay -- 2.8 Time Delay Relays (Timers) -- 2.8.1 Thermal Timer -- 2.8.2 Pneumatic Timer -- 2.8.3 Motor Driven Timers -- 2.8.4 Electronic Timer -- 2.9 Phase Failure Relay (Single Phasing Preventer) -- 2.10 Push Button Switches -- 2.11 Selector Switches -- 2.12 Drum Switches -- 2.13 Limit Switches -- 2.13.1 A Simple Limit Switch -- 2.13.2 Rotary Cam Type Limit Switches -- 2.13.3 Heavy Duty Limit Switches -- 2.13.4 Speed Actuating Sensing Switches -- 2.14 Solenoid Valves -- 2.15 Pressure Switches -- 2.16 Pressure Transducer -- 2.17 Temperature Switches (Thermostats) -- 2.18 Float Switch -- 2.19 Control Transformer -- 2.20 Symbols for Various Components -- 2.21 Control Diagrams -- Chapter 3 Starters for 3-Phase Squirrel Cage Motor -- 3.1 Introduction.

3.1.1 Motor Current at Start and During Acceleration -- 3.1.2 No-load Speed and Final Speed of Motor -- 3.1.3 Starting of Motor -- 3.2 Primary Resistor Type Starters -- 3.2.1 Manual Primary Resistor Type Starter -- 3.2.2 Semi-automatic Stepless Resistance Starter -- 3.2.3 Automatic Primary Resistor Type Starter -- 3.3 Increment Resistance Starter -- 3.4 Line-Reactor Reduced Voltage Starter -- 3.5. Auto-Transformer Reduced Voltage Starters -- 3.5.1 Manual Auto-transformer Starter -- 3.5.2 Automatic Auto-transformer Starter (Open Circuit Transition) -- 3.5.3 Auto-Transformer Voltage Starter (Closed Circuit Transition) -- 3.6 Part Winding Motor Starter -- 3.6.1 Two Step Starting -- 3.6.2 Three Step Starting -- 3.7 Star-Delta Starter -- 3.7.1 Manual Star-delta Starter -- 3.7.2 Push-button Operated Manual Star-delta Starter -- 3.7.3 Semi-automatic Star-delta Starter -- 3.7.4 Automatic Star-delta Starter (Open Circuit Transition) -- 3.7.5 Automatic Star-delta Starter (Closed Circuit Transition) -- 3.8 Starters for Multi-Speed Motors -- 3.8.1 Starter for Two-Speed, Two Winding (Separate Winding) Motor -- 3.8.2 Two Speed One Winding (Consequent Pole) Motor Starter -- 3.9 Reversing the Direction of Rotation of Induction Motors -- 3.10 Plug Stopping of Motor -- 3.11 Dynamic Braking -- Chapter 4 Starters for Wound Rotor Induction Motors -- 4.1 Introduction -- 4.2 Motor Acceleration -- 4.3 Manual Face Plate Starter -- 4.4 Manual Starter Using Master Controllers -- 4.5 Automatic Control of Acceleration -- 4.5.1 Definite Time Limit Starter -- 4.5.2 Current Limit Acceleration Starter -- 4.5.3 Secondary Frequency Acceleration Starter -- Chapter 5 Starters for Direct Current Motors -- 5.1 Types of DC Motors and their Applications -- 5.1.1 Shunt Motor -- 5.1.2 Series Motor -- 5.1.3 Compound Motor -- 5.2 Principles of DC Motor Acceleration.

5.3 Manual Starters for DC Motors -- 5.3.1 Two-point Starter -- 5.3.2 Three-point Starter -- 5.3.3 Four-point Starter -- 5.4 Types of Starters for Automatic Acceleration -- 5.4.1 Direct-on-line Starter -- 5.4.2 Current Limit Acceleration Starters -- 5.4.3 Definite Timer Acceleration Starters -- 5.5 Reversing of DC Motors -- 5.6 Jogging Operation of Motor -- 5.7 Dynamic Breaking of Motor -- 5.8 Plugging Circuit for DC Motor -- Chapter 6 Control of Single Phase Motors -- 6.1 Types of Single Phase Motors -- 6.2 Universal Series Motors -- 6.2.1 Reversing Direction of Rotation of Universal Motor -- 6.2.2 Speed Control of Universal Motor -- 6.3 Shaded Pole Motor -- 6.4 Split Phase Motors -- 6.4.1 Standard Split Phase Motors -- 6.4.2 Capacitor Type Split Phase Motors -- 6.4.3 Starters for Capacitor Type Split Phase Motors -- 6.4.4 Starter for Two Value Capacitor Type Split-phase Motors -- 6.4.5 Starter for a Two Value Capacitor Motor Using a Current Relay and an AutoTransformer -- 6.4.6 Dynamic Breaking of Split Phase Motors -- 6.4.7 Plug Reversing of Capacitor Start Motors -- 6.4.8 Speed Control of Split Phase Motors -- 6.4.9 Speed Control of Permanent Split Capacitor Motors -- Chapter 7 Control of Synchronous Motors -- 7.1 Construction and Operation of a Synchronous Motor -- 7.2 Manual Push Button Synchronising Starter -- 7.3 Timed Semi-Automatic Synchronising -- 7.4 Automatic Starter Using Polarised Field Frequency Relay -- Chapter 8 Protection of Motors -- 8.1 Protection of AC Motors -- 8.2 Co-Ordination of Fuse, Over-Load Relay and Contactor/Circuit Breaker Operating Characteristics -- 8.3 Overload, Short Circuit, and Over-Temperature Protection -- 8.3.1 Overload and Short Circuit Protection -- 8.3.2 Over Temperature Protection -- 8.3.3 Under Voltage Protection -- 8.3.4 Phase Failure and Phase Reversal Protection -- 8.4 Protection of DC Motors.

8.4.1 Field Failure Protection Circuit for dc Shunt Motors -- 8.4.2 Field Acceleration Protection Circuit -- 8.4.3 Field Deceleration Protection Circuit -- Chapter 9 Industrial Control Circuits -- 9.1 Introduction -- 9.2 Planer Machine -- 9.3 Skip Hoist Control -- 9.4 Automatic Control for a Water Pump -- 9.5 Lifting Magnet -- 9.6 Control of Electrical Oven -- 9.7 Overhead Crane -- 9.8 Battery Trolley -- 9.9 Battery Operated Truck -- 9.10 Air Compressor -- 9.11 Walking Beam -- 9.12 Conveyor System -- 9.13 Elevator -- Chapter 10 Troubleshooting in Control Circuits -- 10.1 Introduction -- 10.2 Trouble Spots -- 10.2.1 Fuses -- 10.2.2 Loose Connections -- 10.2.3 Faulty Contacts -- 10.2.4 Incorrect Wire Marking -- 10.2.5 Combination Problems -- 10.2.6 Low Voltage -- 10.2.7 Grounding -- 10.2.8 Momentary Faults -- 10.2.9 Poor Maintenance -- 10.3 General Procedure for Troubleshooting -- Chapter 11 Static Control of Machines -- 11.1 Introduction -- 11.2 Advantages of Static Control over Magnetic Relay Control -- 11.3 Disadvantages of Static Control over Magnetic Relay Control -- 11.4 Explanation of Different Gates -- 11.4.1 AND Gate -- 11.4.2 OR Gate -- 11.4.3 NOT Gate or Inverter -- 11.4.4 NOR Gate -- 11.4.5 NAND Gate -- 11.4.6 Exclusive OR gate -- 11.5 Solid State Timer -- 11.6 Memory Elements (Off-Return Type) -- 11.6.1 Clocked RS Flip-Flop -- 11.6.2 JK Flip Flop -- 11.7 Retentive Memory Element -- 11.8 Development of Logic Circuits -- 11.9 Input Devices for Solid State Logic -- 11.9.1 Capacitive Switch Filters -- 11.9.2 Bounce Eliminators -- 11.9.3 Signal Converters -- 11.10 Output Devices for Solid State Logic -- 11.11 Solenoid Valve Operated Cylinder Piston Assembly -- 11.12 Control of Three Stage Air Conditioning System -- 11.13 Speed Control of Wound Rotor Induction Motor -- 11.14 Control of Planer Machine -- 11.15 Control of Three Conveyors.

11.16 Shift Register -- 11.17 Conveyor System Using a Shift Register -- 11.18 Counter -- 11.19 Decoder -- 11.20 Loading of Castings Into Annealing Furnace Using Decade Counter and Decoder -- 11.21 Mono Shot -- 11.22 Clock -- 11.23 Automatic Filling of Silos Using a Clock and a Monoshot -- 11.24 Down Counter -- 11.25 Encoder -- 11.26 Product Dispersion Conveyor System Using a Down-Counter, an Encoder, a Mono-Shot and a Timer -- Chapter 12 Programmable Logic Controller -- 12.1 Introduction -- 12.2 Input/Output Section -- 12.2.1 Fixed I/O -- 12.2.2 Modular I/O -- 12.3 Discrete Input Modules -- 12.3.1 AC Discrete Input Module -- 12.3.2 DC Discrete Input Module -- 12.4 Discrete Output Modules -- 12.4.1 AC Output Module -- 12.4.2 DC Output Modules -- 12.4.3 Rating of Output Modules -- 12.5 Analog I/O Modules -- 12.6 Safety Circuit -- 12.7 Processor Unit -- 12.7.1 Internal Self Diagnostic System -- 12.7.2 Memory Types -- 12.7.3 Input Image Table -- 12.7.4 Output Image Table -- 12.7.5 User Program Memory -- 12.7.6 Variable Data Memory -- 12.8 Programming Device -- 12.8.1 Dedicated Desktop Programmers -- 12.8.2 Hand-held Programmers -- 12.8.3 Computer Programmers -- 12.8.4 Advantages of Using Personal Computers for Programming -- 12.8.5 Disadvantages of Using Personal Computer for Programming a PLC -- 12.9 Fundamental PLC Programming -- 12.9.1 Introduction -- 12.9.2 Physical Components Versus Program Components -- 12.9.3 Examine ON Instruction -- 12.9.4 Examine OFF Instruction -- 12.9.5 Internal Relay Instruction -- 12.9.6 Latching Instruction -- 12.9.7 Output Instruction -- 12.9.8 Programming Stop Push-buttons -- 12.9.9 Logical Holding Instructions Versus Discrete Holding Contacts -- 12.9.10 Overload Contacts -- 12.9.11 Master Control Relay Instruction -- 12.9.12 Branch Open and Branch Close Instructions -- 12.9.13 Timer Instruction.

12.9.14 Counter Instruction.

Control of Machines is one of the most important functional areas for electrical and mechanical engineers working in industry. In this era of automation and control, every engineer has to acquaint himself on the design installation, and maintenance of control systems. This subject must find its place as a compulsory applied engineering subject in degree and diploma curriculum. Some progressive states and autonomous institutions have already introduced this subject in their curriculum. In this book, static control and programmable controllers have been included keeping in view the latest developments in modern industry. Relay and static control have been dealt with in details. Most of the control circuits included in this book have been taken from Indian industry. A chapter has been devoted to protection of motors and troubleshooting in control circuits.

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Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2018. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.

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