Prepare And Install A Booster Return Conductor On 25 50 Kv Ac Overhead Traction Equipment Ohte Under Isolated And Earthed Conditions Training

Objectives:
• Understand the basic principles of 25/50 kV AC overhead traction equipment (OHTE).
• Identify key components of a booster return conductor system.
• Comprehend the safety protocols for working on OHTE under isolated and earthed conditions.
• Explain the statutory and regulatory requirements (OHS Act, SANS 10219).
• Recognise the importance of earthing and bonding in traction systems.

Topics:
• Overview of 25/50 kV AC traction power supply.
• Components of OHTE: catenary, contact wire, return conductor, booster transformers.
• Purpose and function of the booster return conductor.
• Safety legislation: OHS Act, SANS 10219, and relevant standards.
• Hazard identification: electrical shock, arc flash, working at height.
• Isolation and earthing principles.
• Personal protective equipment (PPE) for OHTE work.
• Introduction to work permits and safety documentation.

Objectives:
• Identify and select appropriate tools and equipment for booster return conductor installation.
• Perform pre-installation inspections and measurements.
• Interpret technical drawings and installation specifications.
• Prepare the work site for safe installation.
• Apply correct handling and storage procedures for conductors and fittings.

Topics:
• Types of tools: tensioning devices, crimping tools, hoists, and insulated tools.
• Equipment inspection and certification.
• Reading and interpreting installation drawings and schematics.
• Site assessment: access, ground conditions, existing infrastructure.
• Material handling: conductor coils, insulators, clamps, connectors.
• Pre-installation checks: conductor continuity, insulation resistance.
• Setting up temporary earthing and bonding.
• Work permit and risk assessment completion.

Objectives:
• Demonstrate safe isolation procedures for 25/50 kV OHTE.
• Install booster return conductor components under isolated conditions.
• Apply correct tensioning and sagging techniques.
• Connect booster transformers and bonding leads.
• Verify installation integrity using appropriate testing methods.

Topics:
• Step-by-step isolation procedure: switching, proving dead, earthing.
• Installing support structures: brackets, insulators, and clamps.
• Stringing the return conductor: pulling, tensioning, and sag adjustment.
• Connecting booster transformers: primary and secondary windings.
• Bonding connections to rails and earthing systems.
• Mid-point and sectioning connections.
• Testing continuity and insulation after installation.
• Documentation of installation parameters.

Objectives:
• Perform installation procedures under earthed conditions safely.
• Understand the differences between isolated and earthed working conditions.
• Install booster return conductor in live (earthed) environments.
• Use specialised live-line tools and techniques.
• Apply emergency response procedures for incidents during installation.

Topics:
• Working under earthed conditions: principles and precautions.
• Use of hot sticks and insulated platforms.
• Installing conductor while maintaining earth continuity.
• Adjusting tension and sag without de-energising adjacent lines.
• Handling booster transformers under earthed conditions.
• Emergency procedures: rescue from height, electric shock first aid.
• Coordination with network control and operations.
• Quality assurance checks during installation.

Objectives:
• Conduct post-installation tests to verify system performance.
• Identify and rectify common installation faults.
• Commission the booster return conductor system.
• Perform insulation resistance and continuity tests.
• Document test results and complete handover procedures.

Topics:
• Testing equipment: megger, micro-ohmmeter, phase rotation tester.
• Insulation resistance testing: conductor to earth, between phases.
• Continuity testing of bonding and connections.
• Booster transformer ratio and polarity tests.
• Fault finding: poor connections, incorrect tension, earth faults.
• Commissioning checklist and sign-off.
• Updating as-built drawings and records.
• Handover to maintenance team.

Objectives:
• Demonstrate competence in a simulated installation scenario.
• Integrate all previous learning into a complete installation task.
• Complete a formal practical assessment.
• Review safety and quality standards.
• Receive feedback and certification information.

Topics:
• Simulated installation exercise: from planning to commissioning.
• Practical assessment: individual tasks under supervision.
• Safety compliance evaluation.
• Review of common errors and best practices.
• Written knowledge test.
• Feedback session and areas for improvement.
• Certification requirements and next steps.
• Course evaluation and closure.