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INDUSTRIAL ELECTRICAL SYSTEMS

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.

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Description

Learner Profile:

This course is aimed at maintenance techs, facilities techs, fitters, mechanical craft people looking to cross skill, anyone working with electrically controlled equipment.

Competence in written and spoken English is also essential. International students whose first language is not English are required to have an appropriate score in an approved examination in English language. We accept an IELTS test score of 6. We also accept IELTS equivalents such as TOELF score 60-78 and Cambridge exam level B2

At the end of the course learners will be able to:

• Test electrical systems to narrow down a problem area.

• List electrical hazards when testing live systems and list ways to minimise hazards.

• Use electrical schematics to navigate a system effectively.

• Carry out isolation and verification before physical work on or near live parts.

• Describe the operating principle of fuses, MCBs, RCDs and RCBO’s

• Competently use multi-meters and grip-Ons to test systems.

• Test 3-phase motor circuits controlled by contactors and overloads.

• Demonstrate how to troubleshoot a range of common faults on work-based technology.

• Perform motor bench testing including insulation resistance testing.

• Perform maintenance tasks on VSD driven motors including cloning drives, common parameter adjustments, fault code causes, setting IP addresses.


Learner Prerequisites: QQI Level 5 or equivalent ideally in a related technical area

Course Modules

Unit 1 Electrical Concepts: 


• 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: 


• 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 


• 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


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


• 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 


• 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.

Duration

6 days Blended/Classroom (9.00am - 4.30pm)


Self-Direct Hour 20 -100 hours, depending on entry level knowledge.

Certification

QQI Level 6