Description

Course Aim:

This course enables industrial maintenance technicians to safely, commission and diagnose faults in specialist AC/DC industrial components and systems including safety relays, induction motors and variable speed drives. This course tackles the common problems of induction motor and control circuit faults, with the goal of helping technicians identify the root cause.

Course Content (Modules):

Unit 1

Electrical Concepts: at the end of this learners should be able to:

• Describe Current, Voltage and Resistance

• Build series and parallel circuits • Measure currents and voltages

• Explain how Ohms Law works in Parallel and in Series Circuits

Unit 2

Electrical Safety Awareness: at the end of this learners should be able to:

• List the hazards associated with electricity

• Appreciate why precautions are necessary

• List the effects of electricity on the human body

• Evaluate if it is necessary to work LIVE

• List the types of electrical fault and circuit protection

• Appreciate why and when LOTO is required

• Follow procedures for working on equipment LIVE and De-energised

• List the types of fault conditions that can be detected and protected.

• Describe the principle of operation of circuit breakers

• Choose correct MCB rating and trip characteristics for given application

• Explain Fuse types, ratings and application examples

• List a set of scenarios that could cause the activation of RCD’s and RCBO’s.

• Troubleshoot to find the cause of a tripping RCD in a typical distribution board.

Unit 3

Circuits and Circuits Components – at the end of this learners should be able to:

• Understand the differences between conductors and insulators

• Understand the concept and units of voltage, current and resistance. Use Ohm’s law to predict circuit behaviour

• Competently use a multimeter to measure V, I and R.

• Understand Kirchoff’s current law

• Work out what voltages and currents will be at different points in series and parallel circuits

• Understand how to detect and conclude that circuits have open or short circuit faults

• Use the correct specification language to describe switchgear in terms of poles and throws (ways)

• Understand the principles of electro-magnetism and how it applies to DC motors

Unit 4

AC Systems - at the end of this learners should be able to:

• Describe the characteristics of an AC Sine Wave in terms of RMS voltage, peak voltage, frequency, and time period.

• Deduce Inductive Reactance in an AC coil.

• Test step-up and step-down transformers.

• AC/DC relay/contactor circuits.

Unit 5

3-phase and motor control circuits: at the end of this learners should be able to:

• Describe how 3-phase power is generated and distributed.

• Explain the principle of induction motors including motor poles and rpm, star/delta wiring setups, Power, and Torque ratings. Types of Motors and their suitable applications

• Interpret motor nameplate data.

• Bench-test motors

• Wire and test 3ph motor using contactors and overloads.

• Troubleshoot forward and reverse and also star delta 3-phase motor circuits.

• Select, maintain, test, and replace motors.

• Diagnose and fix common motor problems.

• Use industrial schematics to fault-find 3 phase motor circuits.

Unit 6

Variable Speed Drives - - at the end of this learners should be able to:

• Control and monitor motors using a variable speed drive.

• Upload and download parameters when replacing drive.

• Troubleshoot with drive fault codes.

• Alter common parameters - ramp times, max frequency, torque limit, jog frequency.

• Control drives on an ethernet network.

• Wire control inputs and outputs – start/stop, forward/reverse, jog and faulted.