AC Induction motor (IM) are used as actuators in many industrial processes. Although IMs are reliable, they are subjected to some undesirable stresses, causing faults resulting in failure. Monitoring of an IM is a fast emerging technology for the detection of initial faults. It avoids unexpected failure of an industrial process. Monitoring techniques can be classified as the conventional and the digital techniques. 1.1 PROTECTION SCHEME OF INDUCTION MOTOR Classical monitoring techniques for three-phase IMs are generally provided by some combination of mechanical and electrical monitoring equipment. Mechanical forms of motor sensing are also limited in ability to detect electrical faults, such as stator insulation failures. In addition, the mechanical parts of the equipment can cause problems in the course of operation and can reduce the life and efficiency of a system. It is well known that IM monitoring has been studied by many researchers and reviewed in a number of works. Reviews about various stator faults and their causes, and detection techniques, latest trends, and diagnosis methods supported by the artificial intelligence, the microprocessor, the computer and other techniques in monitoring unbalanced voltage inter turn faults, stator winding temperature and microcontroller based digital protectors have been recently studied subjects. In these, while one or two variables were considered together to protect the IMs, the variables of the motor were not considered altogether. Measurements of the voltages, currents, temperatures, and speed were achieved and transferred to the computer for final protection decision. A programmable integrated circuit (PIC) based protection system has been introduced using Microprocessors and the solutions of various faults of the phase currents, the phase voltages, the speed, and the winding temperatures of an IM occurring in operation have been achieved with the help of the microcontroller, but these electrical parameters have not been displayed on a screen. Nowadays, the most widely used area of programmable logic controller (PLC) is the control circuits of industrial automation systems. The PLC systems are equipped with special I/O units appropriate for direct usage in industrial automation systems. The input components, such as the pressure, the level, and the temperature sensors, can be directly connected to the input. The driver components of the control circuit such as contactors and solenoid valves can directly be connected to the output.

1. A SEMINAR PRESENTATION ON
PROTECTION OF INDUCTION
MOTOR USING PLC
ELECTRICAL ENGINEERING
GOVERNMENT ENGINEERING COLLEGE ,AJMER
Seminar Coordinator Guided By :- Presented By:-
Mr. K.G Sharma Dr. Lata Gidwani ABHISHEK MATHUR
Associate professor Assistant professor VIII th semester
Electrical Branch

2. ABSTRACT
 In most modern industries there is a growing need for high
efficiency and availability in motor driver systems.
 Moreover, motor operation monitoring is necessary for the
implementation of proper and cost effective motor
maintenance.
 In this research, a PLC-based protection method for three-
phase induction motors is used .
 The PLC automated process costs less, provides higher
accuracy.
 The PLC correlates and controls the operational
parameters to the set point requested by the user and
monitor the motor.

3. INDUCTION MOTOR PROTECTION

4. INTRODUCTION
o Main aim of this research based project is to
design a motor driver system with the help
of PLC to control induction motor and
protect induction motor from possible faults .
o All operational data is provided by a device
that is able to read line currents, line-to-line
voltages, unbalanced current, unbalance
voltage and temperature.
o This systems are equipped with special I/O
units appropriate for direct usage in
industrial automation systems

5. EXISTING SYSTEM
 Fault Detection and Protection of Induction motor
using PIC Controller in Sept 2006 .
 The application of wireless sensor networks for
condition monitoring in three-phase induction
motors in 2007.
 A Connectivity Improving Mechanism for ZigBee
Wireless Sensor Networks.

6. FAULTS
EARTH FAULTS
UNDER VOLTAGE
OVER VOLTAGE OVERLOAD
SINGLE PHASE
PHASING REVERSAL

7. PROTECTION SYSTEM HARDWARES
 PROGRAMMABLE LOGIC CONTROLLER
 POWER SUPPLY
 RMS TO DC CONVERSION AD536 A
 RS-232 CABLE
 CURRENT/VOLTAGE TRANSFORMERS
 COMPUTER SYSTEM

8.  A PLC is a small computer used
for automation of real world
processes, such as control of
machinery on factory assembly
lines.
 It was originally developed to
replace mechanical relay,
timers, counters.
 Its purpose to monitor crucial
parameters & adjust process
operation accordingly.

9. APPLICATIONS OF PLC

10.  Sensors - converts a physical
condition into an electrical
signal.
 Discrete Input/output- referred to
as a digital input/output, is an
input/output that is either in an
ON or OFF condition.
 Analog Input/output:-An analog
input/output is a continuous,
variable signal.
 CPU :- is a microprocessor system
that contains the system memory
& decision making unit.

11. PLC PROGRAMMING
Ladder diagram
The ladder diagram is the most
popular programming language
Statement list Function block

13. POWER SUPPLY
 A Constant Power
Supply of 5V is
required in the
proposed system using
rectifiers , filters and
voltage regulator.

14. AD536A is a complete monolithic integrated
circuit that performs true rms to dc conversion

15. RS-232 CABLE
 it is a serial communication physical interface
through which information transfers in or out
one bit at a time.
 it provides the connection
between PLC and
computer system.

16. A current transformer is a type of "instrument transformer" that is
designed to provide a current in its secondary which is accurately
proportional to the current flowing in its primary.
Voltage transformers (VT) or potential transformers (PT) are another
type of instrument transformer, used for metering and protection
in high-voltage circuits.

17. SOFTWARE INTERFACING

19. SCADA MONITORING
SCADA stands for SUPERVISORY CONTROL
AND DATA ACQUISITION
its systems are used to monitor and control a
plant or equipment in industries graphically
along with the control hardware .

21. APPLICATION OF SYSTEM
Textile Industries
Industrial Pumps & Fans
Elevators
Cement mills
Rubber mills
Cranes

22.  This paper presents a part of an ongoing work.
 In all growing industries ,there is need of motor
driver systems to control and monitor of
induction motor from one central point using
PLC .
 This motor driver system will identified the fault
and protect the motor within a second

23. CONCLUSION
 In this study, a novel digital protection system for
three phase Induction motor designed and
implemented successfully.
 If any fault is observed during online operation of the
motor, a warning message appears on computer and
then the motor is stopped.
 it provides a visual environment, which makes the
system more user friendly than other protection
system.

24.  M. Peltola, “Slip of ac induction motors and how to minimize it” ABB Drives Press
Releases Technical Paper, ABB, New Berlin, 2003, pp. 1–7.
 I. Colak, H.Celik, ˙I.Sefa “On line protection system for induction motors” Energy
Convers. Manage.vol. 46, no. 17, pp. 2773–2786, 2005.
 A. Siddique, G.S.Yadava, and B.Singh, “A review of stator fault monitoring
techniques of induction motors” IEEE Trans. Energy Convers.vol. 20, no. 1, pp.
106114, Mar. 2005.
 Y. Zhongming and W. Bin, “A review on induction motor online fault diagnosis” in
3rd Int. Power Electron. Motion Control Conf.(PIEMC 2000),vol. 3, pp. 1353–1358.
 M. E. H. Benbouzid, “Bibliography on induction motors faults detection and
diagnosis” IEEE Trans. Energy Convers.vol. 14, no. 4, pp. 1065–1074, Dec. 1999.
 M.G. Ioannides, “Design and implementation of PLC-based monitoring control
system for induction motor,” IEEE Trans. Energy Convers.vol. 19, no. 3, pp. 469–476,
Sep. 2004.

26. QUERIES ????