PANELS AND STARTERS

OSC: Design and Wire an Oscillating Panel

Overview

You will be taught on how to design, wire and commission an Oscillating Motor starter

Key and critical concepts which you will learn:

  • Draw circuit diagrams for the main and control circuits, with two stop / start stations, for a three-phase Oscillating motor starter installation.
  • Wire an Oscillating Motor starter and connect it to a motor, according to the given wiring diagram.
  • Test the circuit and test-run the installation.

Tools, consumables, machinery and equipment required:

  • Module book / learning material
  • Pen/ pencil
  • Booklet to make notes
  • Main breaker, 2 contactors, 1 overload, control breaker, emergency, 2stops, 2starts, lamp, 3 phase induction motor, connecting wires, emergency stop, voltmeter and ammeter, 2 Limit switches
  • Wire stripper, side cutter, tube spanner no 10, round nose plier
  • Circuit diagram
  • Safety glasses
  • Measuring instrument – multimeter

Application:

An Oscillating Motor starter control system is often used when it’s necessary to reverse the direction of rotation of a motor automatically e.g. in lifts, overhead cranes and machines.

VSD: Wire a Variable Speed Drive

Overview

You will be taught on how to design, wire and commission a variable Speed Drive
Motor starter

Key and critical concepts which you will learn:

  • Draw circuit diagrams for the main and control circuits, with one stop/start
  • station, for a three-phase DOL motor starter installation.
  • Wire an DOL Motor starter and connect it to a motor, according to the given wiring diagram.
  • Test the circuit and test-run the installation.

Tools, consumables, machinery and equipment required:

  • Module book / learning material
  • Pen/ pencil
  • Booklet to make notes
  • Main breaker, 1 contactor, 1 overload, control breaker, emergency stop, 1 stops,1 starts, lamp, 3 phase induction motor, connecting wires, voltmeter and ammeter,
  • Wire stripper, side cutter, tube spanner no 10, round nose plier
  • Circuit diagram
  • Safety glasses
  • Measuring instrument – multimeter

Application:

A Variable Speed Drive Motor starter control system is often used when it’s
necessary to control the speed of a motor automatically e.g. in lifts, overhead cranes
and machines.

PM-T: Pole Changing Motors

Overview

In this module you will be taught about pole changing motor theory

Key and critical concepts which you will learn:

  • Explain how the speed of a squirrel cage induction motor can be changed while the frequency of the supply voltage remains constant.
  • Explain the effect on a squirrel cage induction motor, when the supply voltage is lowered.
  • Show, by means of diagrams, how a “constant-kilowatt” motor is connected in the fast and slow speeds and explain why it is a “constant-kilowatt” motor.
  • Show by means of diagrams, how a “constant-torque” motor is connected in the fast and slow speeds and explain why it is a “constant-torque” motor.
  • Show, by means of diagrams, how a “variable-torque, variable-kilowatt” motor is connected in the fast and slow speeds and explain why it is a “variable-torque, variable-kilowatt” motor.
  • Name two uses for each of the motors mentioned.
  • State how many poles a pole changing motor will

Tools, consumables, machinery and equipment required:

  • Learning material
  • Circuit diagram
  • Three phase pole changing induction motor

Application:

  • These motors can be used where you need to control the speed of the motor either run it fast or slow

AT-1: Wire a Fully Auto Transformer Starter

Overview:

 In this module you will be taught how to wire a fully automatic transformer starter  

Key and critical concepts which you will learn:

  • Draw circuit diagrams for the main and control circuits, of a fully automatic auto-transformer starter.
  • Wire a fully automatic auto-transformer starter and connect it to a motor.
  • Test the circuit and test-run the installation

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires, control breakers
  • Auto transformer, contactors, overload, emergency stop, stop button, start button, timer switch, relay
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase induction motor

Application:

  • These motors can be used where you need to reduce the line voltage at starting. It therefore also reduces the starting current.

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures

FF-2-E: Fault Find Basic Electrical Circuit

Overview:

In this module you will be taught how to do a basic fault finding on an electrical panel or starter correctly and safely. You will also be taught on how to follow the proper procedure when you fault find. As an electrical learner you always be faced with challenges to do find faults in the electrical environment

Key and critical concepts which you will learn:

  • Use a systematic approach to fault find electrical circuits.
  • Locate faults on given electrical panels or equipment by using circuit diagrams and inspection and testing procedures.

Tools, consumables, machinery and equipment required:

  • Relay panel or sequence starter panel or any other wired panel
  • Circuit diagram
  • Measuring instrument
  • Lock out tag

Application:

Any electrical work environment whereby you are expected to do maintenance or fixing a breakdown, domestic and industrial

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures
  • Electrical symbols

SL-2: Wire a Liquid Starter

Overview:

 In this module you will be taught how to connect a liquid starter to a slipring motor  

Key and critical concepts which you will learn:

  • Draw the main and control circuits of a liquid starter
  •  Wire the motor to the starter

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires, control circuit breaker
  • Panel with a liquid starter which consist of contactor, overload, emergency stop, stop button, start button
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase slipring motor

Application:

  • These motors can be used where you need to regulate the starting current to a much lower value and for speed control.

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures

SL-3: Wire a Drum Controller

Overview:

 In this module you will be taught how to wire a grid and controller to a slip ring motor   

Key and critical concepts which you will learn:

  • Draw the circuit of grid and controller starter
  •  Wire the motor to the starter

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires, control circuit breaker
  • Panel with a grid and control starter  
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase slipring motor

Application:

  • These motors can be used where you need to regulate the starting current to a much lower value and for speed control.

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures

SL-1: Wire a Resistance Starter

Overview:

 In this module you will be taught how to connect a resistance starter to a slip ring motor  

Key and critical concepts which you will learn:

  • Draw the main and control circuits for a slip-ring motor and starter.
  •  Wire the motor to the starter

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires, control circuit
  • Panel with a resistance starter which consist of contactors, overloads, emergency stop, stop button, start button, indicating lamps, wire wound resistances
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase slipring motor

Application:

  • These motors can be used where you need to regulate the starting current to a much lower value and for speed control.

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures

PM-3: Connect a Pole Changing Motor (Fully Automated)

Overview:

 In this module you will be taught how to connect a three- phase pole changing motor to a fully automatic starter  

Key and critical concepts which you will learn:

  • Draw the wiring diagrams for the main and control circuits for a star and a delta three phase pole changing motor and connect them to a fully automatic speed control starter

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires
  • Contactors, overloads, emergency stop, stop button x2, start button x2
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase pole changing induction motor

Application:

  • These motors can be used where you need to control the different speed of the motor run it either fast or slow   

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures

PM-2: Connect a Pole Changing Motor (Contractors)

Overview:

 In this module you will be taught how to connect a three- phase pole changing motor to contactors

Key and critical concepts which you will learn:

  • Draw the wiring diagrams for the main and control circuits of a star and a delta three-phase pole changing motor and connect them to contactors with stop and start stations

Tools, consumables, machinery and equipment required:

  • Panel with main breaker, connecting wires
  • Contactors, overloads, emergency stop, stop button x2, start button x2
  • Wire stripper, side cutter, tube spanner no 10, round plier
  • Circuit diagram
  • Three phase pole changing induction motor

Application:

  • These motors can be used where you need to control the different speed of the motor run it either fast or slow  

Additional resources

  • Subject matter experts
  • In-company Standard Operating Procedures