Troubleshooting instrumentation and Control Systems
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Troubleshooting instrumentation and Control Systems Course
Introduction:
Course Objectives:
- To develop a structured approach to electrical troubleshooting using common terminology and to provide troubleshooting methods and solutions for various electrical equipment and control systems problems.
- To develop a better understanding of various test equipment used in electrical troubleshooting.
- To develop a better understanding of various electrical equipment and control systems design, functionality, and failure modes.
- To better understand work practices, which allow for successful troubleshooting including job plans.
- To provide examples of successful troubleshooting techniques and ‘hands-on’ experiences plus case studies and group problem-solving exercises.
- To provide troubleshooting methods and solutions for various electrical equipment and control systems problems.
Who Should Attend?
This course is intended for Electrical Maintenance Engineers, Supervisors, and Technicians working in maintenance related roles who need either a greater awareness of, or to become more proficient in, the troubleshooting of electrical equipment and control systems and electrical maintenance activities. Because the methods and examples are generic, personnel from all industries will benefit.
Course Outlines:
THE TECHNOLOGY OF ELECTRICAL EQUIPMENT
Definitions and descriptions of electrical equipment used in industrial applications including:
- Source Equipment – transformers
power supplies (UPS)
batteries
generators - Switching Equipment – switchgear
motor control center (MCC)
disconnects
contactors
overload relays
starters
neutral ground resistors (NGR) - Control Equipment – variable frequency drives (VFD)
programmable logic controllers (PLC)
distributed control systems (DCS)
power monitoring and control
relays and timers
limit switches
temperature switches
pressure switches
level switches
speed switches
vibration switches
safety and shutdown switches
motor/feeder protective devices - Load Equipment – motors (AC induction, asynchronous, DC)
heaters
solenoids
valve actuators
signaling and alarm devices
TROUBLESHOOTING APPLICABLE TO THE ABOVE LIST
- methods
- terminology
- principles
- special techniques
TEST EQUIPMENT
- digital voltmeter (DVM)
- oscilloscope or oscillograph
- megger
- hi-pot tester
- frequency meter
- ammeter (inline, clamp-on)
- power meter (watt, VAR)
- current transformer
- specialized equipment
TYPICAL PROBLEMS/FAILURES
- common-mode failures
- phase imbalance
- contact pitting/arcing
- electronic control component failure
- blown fusing
- damaged windings
- worn bearings
- damaged brushes
- burnt ballasts
- damaged excitation circuits
- battery cell failure
- inverter/rectifier failure
- high voltage bushing failure
- switch failure
- ground fault
TYPICAL TROUBLESHOOTING JOB PLAN DEVELOPMENT
- identify troubleshooting step sequence
- prepare procedures
- documentation
- follow-up
- regulatory requirements
- training
TYPICAL ELECTRICAL DRAWINGS AND SYMBOLS
- single-line
- control wiring
- distribution
- symbols