UEEEL0005 - Develop and connect electrical control circuits

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Unit code: UEEEL0005 | Study level: TAFE
Credit points
N/A
Location
Sunshine
Prerequisites
UEECD0007 - Apply work health and safety regulations, codes and practices in the workplace
UEECD0019 - Fabricate, assemble and dismantle utilities industry components
UEECD0020 - Fix and secure electrotechnology equipment
UEECD0051 - Use drawings, diagrams, schedules, standards, codes and specifications
UEEEL0003 - Arrange circuits, control and protection for electrical installations
UEEEL0019 - Solve problems in direct current (d.c.) machines
UEEEL0020 - Solve problems in low voltage a.c. circuits
UEEEL0021 - Solve problems in magnetic and electromagnetic devices
UEEEL0023 - Terminate cables, cords and accessories for low voltage circuits
UEEEL0024 - Test and connect alternating current (a.c.) rotating machines
UEEEL0025 - Test and connect transformers
UEECD0044 - Solve problems in multiple path circuits
UEECD0046 - Solve problems in single path circuits
(Or equivalent to be determined by unit coordinator)
Overview
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Overview

This unit involves the skills and knowledge required to develop, connect and functionally test electrical power and control circuits that perform specific control functions.
It includes working safely, developing schematic diagrams and converting them to wiring diagrams, selecting and connecting contactors and control devices to perform a specific function. It also includes testing electrical control circuits and completing circuit development activities documentation.
The skills and knowledge described in this unit require a licence or permit to practice in the workplace where work is carried out on electrical installations which are designed to operate at voltages greater than 50 volt (V) alternating current (a.c.) or 120 V direct current (d.c.).

Assessment

For Melbourne campuses

Assessment tasks will be designed to reinforce & extend knowledge and skill competence within set & controlled parameters in accordance with each unit’s learning outcomes & performance criteria requirements, incl the setting of work based practical application tasks designed to provide evidence of competence outcomes, within periodic and scheduled timelines.
Students will be expected to demonstrate the following required skills:
*applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and workplace procedures and practices, including using risk control measures
*applying sustainable energy principles and practices
*using manufacturers’ catalogues to select:
*circuit components for appropriate duty ratings
*control devices for specified requirements
*pushbuttons/pilot lamps for specific requirements
*relays for specified requirements
*the most suitable motor starter for a given situation
*timers for specified functions
*labelling wires and terminals
*converting circuit (schematic) diagrams to wiring diagrams
developing forward reverse circuit requiring interlocking from a description of the circuit operation, including jog and interlock functions:
*electrical control circuit in accordance with a written description (specification) and listing the sequence of operation
*control circuit incorporating local and remote start and stop buttons and electrical interlocking
*simple stop-start control circuit that incorporates pilot lights and latching circuit
*timer controlled circuits from a written description and listing the sequence of circuit operation
*measuring starting current and torque of selected motor starters
*connecting and testing:
*circuit with a braking feature to operate a three phase motor
*control devices into control circuits
*direct-on-line (DOL) motor starter and testing the operation of the power and control circuits
*variable speed drive (VSD)
*electronic (soft) starter
*electrical circuits with local and remote start-stop control
*input and output devices to a programmable relay using a diagram
*motor starter power and control circuits for correct operation
*multiple motor starting circuit which incorporates start, stop and jog control
*simple electrical control circuit from circuit diagrams
*timer controlled circuit using a circuit diagram as a guide
*completing and documenting circuit development activities.

Students will also be expected to demonstrate the following knowledge:
*operating principles, basic contact configurations and identification and common applications of:
*control relays
*timers
*contactors
*thermal overloads
*control circuits, including:
*converting circuit (schematic) diagrams to wiring diagrams
*identification of circuit diagrams (schematic) symbols and explain the operation of components represented
*switching configurations and common applications of push buttons
*control circuit drawing conventions
*remote stop-start control and electrical interlocking, including:
*operation of local and remote start-stop control of relays
*operation of an electrically interlocked control circuit
*applying circuit checking and testing techniques to an electrical control circuit
*time delay relays, including timer circuit checking and testing procedures
*circuits using contactors, including:
*circuit diagram symbols
*circuit development using a contactor
*using contactors for motor control
*jogging and interlocking, including:
*purpose and application of jogging control of motors
*electrical/mechanical interlocking
*operation of motor control using start, stop and jog buttons
*control devices, including:
*common control devices used in automatic control circuits: limit switches, proximity switches, photoelectric cells, pressure switches, float switches, light sensors and temperature sensors
*basic operating principles of common control devices
*advantages and disadvantages of common control devices
*applications for common control devices
*programmable relays, including:
*advantages of programmable relays over electromagnetic control circuit control
*typical applications of programmable relays
*block diagram representation and basic operating principles
*input and output parameters, listing, connections and output types
*basic programming of ladder circuits consisting of inputs, outputs i.e. stop-start circuit
*using the monitoring facility of the programmable relay to verify each ladder circuit operation
*programming timers and using the monitoring facility of the programmable relay to check the values of the timer
*external devices
*implications of programming normally closed field devices
*conversion of control circuits
*common faults and their symptoms
*three phase induction motor starters, including:
*reasons for limiting the starting current of large motors
*requirements of AS/NZS 3000 and the local supply authority requirements, with regard to starting and control of motors
*operating principles, applications and circuits for:
*direct on line (DOL) starter
*variable speed drive (VSD)
*variable frequency drive (VFD)
*electronic (soft) starter
*three phase induction motor starters- reduced voltage, including:
*operating principles and circuits for reduced voltage starters
*common applications for starter types
*comparison of motor starters basic characteristics
*three phase induction motor reversal and braking, including:
*operating principles and control circuits for reversal and braking methods
*comparison of the different braking methods used
*typical applications for braking methods
*three phase induction motor speed control, including:
*operating principles and circuits for motor speed control
*relevant manufacturer specifications.

Required reading

The qualified trainer and assessor will advise students of class notes, reading materials produced by VU Polytechnic and further support via VU Polytechnic e-learning system and/or in person.

As part of a course

This unit is studied as part of the following course(s):

Certificate III in Electrotechnology Electrician
UEE30820 | Certificate iii | Duration:

Refer to the course page for information on how to apply for the course. VU takes care to ensure the accuracy of this unit information, but reserves the right to change or withdraw courses offered at any time. Please check that unit information is current with the Student Contact Centre.

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