Troubleshooting, Maintenance & Protection of AC Electrical Motors & Driver

Tanggal
20-22 Maret 2012
22-24 Mei 2012

Pukul
08.00 – 16.00 WIB

Tempat
Hotel Ambarukmo, Yogyakarta

DESKRIPSI
It is estimated that electrical drives and other rotating equipment consume about 50% of the total electrical energy consumed in the world today. The cost of maintaining electrical motors can be a significant amount in the budget item of manufacturing and mining industries.

This workshop gives you a thorough understanding of electrical motor’s working, maintenance and failure modes and gives you the tools to maintain and troubleshoot electrical motors. You will gain valuable insight into the selection of the protection necessary to ensure your motors are protected against fault conditions, so as to ensure reliability and long life.

You will gain a fundamental understanding of the installation, operation and troubleshooting of electric motors. Typical applications of electric motors in mining, manufacturing, materials handling and process control are covered in detail. You will learn the basic steps in specifying, installing, wiring and commissioning motors. The concluding section of the course gives you the fundamental tools in troubleshooting motors confidently and effectively.

MATERI

FUNDAMENTALS OF MOTOR TECHNOLOGY
- Basic principles of rotating electric machines
- Fundamental principles of speed control
- Efficiency, torque, inertia, horsepower/power factor
- Torque-speed curves
- How the motor produces torque
- Types of motors
AC MOTOR THEORY, CONSTRUCTION AND MAINTENANCE
- Basic construction and physical configuration, windings
- Principles of operation and performance
THREE PHASE AC INDUCTION MOTORS
- Components
- Theory of operation
- Induction motor design
- Duty cycles
- Insulation and Cooling requirements
- Starting methods
- Selecting motors
- Maintenance of AC machines
- Types of faults, fault finding and testing of AC machines
- Testing instrumentation
PROTECTION OF AC MOTORS
- Protective devices
  - Thermal Overload
  - Over Current / Overload
  - Under-voltage / Over-voltage
  - Under frequency
  - Current unbalance or negative phase sequence
  - Earth fault protection
  - Pole slip / Out of step
  - Loss of excitation
  - Over fluxing
  - Stall protection / acceleration time / Start up supervision (Time between starts / Starts per hour)
  - Voltage controlled or restrained over current
- Protection settings
SPEED CONTROL OF AC MOTORS
- Introduction to Variable Speed Drives or Power Electronic Converters
- Types, and Designs of Variable Speed Drives
PROTECTION OF AC CONVERTORS AND MOTORS
- Frequency converter protection circuits
- Protection settings
CONTROL SYSTEMS FOR AC VARIABLE SPEED DRIVES
- Control theory of VSDs explained
THE SELECTION OF AC CONVERTORS FOR VARIABLE SPEED DRIVE APPLICATIONS
- Selection procedure
- Nature of the load
- Selection of correct size motor and converter
INSTALLATION AND COMMISSIONING OF AC VARIABLE SPEED DRIVES
- General Installation and environmental requirements
- Electrical connections and Earthing requirements
- Control wiring and pre-commissioning
- Commissioning tests
NEW TECHNOLOGIES AND DEVELOPMENTS

METODE
Presentasi, Diskusi, Simulasi, Studi kasus, Evaluasi

OBJECTIVES

Understand AC motor operation and construction
Specify, select and install motors
Specify protection requirements for motors
Specify speed control requirements for motors
Reduce downtime on electrical motors
Improve plant safety
Improve plant throughput
Reduce spares usage and requirements
Install and commission motors
Fix faults on motors
Interpret motor performance curves
Interface control circuits of motors with PLCs/DCSs

PEMATERI
Ir. Teguh Santoso and Team

PARTICIPANTS
Anyone associated with the use of electrical motors in the industrial or automation environment. The workshop will also benefit those working in system design as well as site commissioning, maintenance and troubleshooting. Typical personnel who would benefit are: