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GWO Control of Hazardous Energies (CoHE) Training

Managing and controlling the risks of hazardous electrical and pressure fluid energies.

The Training

Electrical isolation and lock-out work in an industrial environment

Training overview

Control of Hazardous Energies addresses the energies present in a wind turbine that carry a high risk of injury. Two modules — Electrical Safety and Pressure Fluid Safety — build the knowledge required to establish a safe working condition by isolating, testing and verifying a system before work begins.

The training is aimed at people who perform isolations and testing themselves, and at those preparing for roles such as Qualified Electrical Person or Qualified Pressure Fluids Person, where establishing a safe condition enables other people to work. Completing a simple permit to work is a core part of both modules.

The standard is clear about its boundaries. It builds on existing technical competency rather than teaching it, and is not aimed at improving technical capability or teaching advanced knowledge such as troubleshooting. The Electrical Safety module does not prepare participants to manage or control the risks of operating high voltage electrical systems.

Why this training matters

Stored and live energy is the hazard most likely to injure someone who believed a system was safe. A disciplined, repeatable isolation process — identify, isolate, verify — is what makes that assumption reliable.

What you will learn

  • Take responsibility for your own and others' safety when working with hazardous energies
  • Complete a simple permit to work as the person establishing the safe working condition
  • Recognise the responsibilities of a Qualified Electrical Person or Qualified Pressure Fluids Person
  • Establish a safe working condition and test and isolate equipment correctly
  • Respond appropriately to a hazardous energy incident

Training pathways

Initial Training

Delivered as the electrical safety module, the pressure fluid safety module, or both.

Refresher / Renewal

In transition

A shorter route for personnel holding a valid CoHE initial or refresher record. Records must be renewed before expiry.

Duration: Electrical Safety 4 hours · Pressure Fluid Safety 2 hours 20 minutes

Training content

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01

GWO CoHE Electrical Safety Training

Managing and controlling the risks of hazardous electrical energies as a Qualified Person.

8 hours initial; 4 hours refresher

View Module
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02

GWO CoHE Pressure Fluid Safety Training

Managing and controlling the risks of hazardous pressure fluids as a Qualified Person.

5 hours 30 minutes initial; 2 hours 20 minutes refresher

View Module

Key knowledge

  • Sources of hazardous energy in a wind turbine
  • The permit to work system and the role of the person establishing safe conditions
  • Responsibilities attached to Qualified Person roles
  • Isolation, testing and verification sequence

Practical skills

  • Establishing an electrically safe working condition
  • Testing and isolating electrical equipment
  • Releasing and verifying stored pressure in fluid systems
  • Completing a simple permit to work

Safety and risk awareness

  • Stored pressure remaining in hydraulic systems after shutdown
  • Circuits believed to be dead but not verified
  • Site authorisation to isolate remains a matter for the employer

Competencies

  • Establish a safe working condition on electrical or pressure fluid systems
  • Complete a simple permit to work
  • Act within the responsibilities of a Qualified Person

Key learning outcomes

  • Hazardous energy identification
  • Permit to work
  • Isolation, testing and verification
  • Responsibilities of a Qualified Person

Practical training

Focused on the isolation discipline itself, rehearsed until it becomes routine, including permit to work completion.

Important information

  • The standard states that CoHE Electrical Safety training does not prepare participants to manage or control the risks of operating high voltage electrical systems.
  • The training builds on existing technical competency; it is not aimed at improving technical capability or teaching advanced knowledge such as troubleshooting.
  • Maximum 8 hours contact time per training day.