1 Table of contents 145

2025-05-02_CoHE_V4

Version 4 is valid from 2nd May, 2025 Version 3 is valid until 1st October, 2025

1. List of Abbreviations		5
2. Terms and Definitions		5
3. Change Log		8
4. CoHE roles and responsibilities		10
4.1 CoHE Basic Safety Module		10
4.2 Electrical Safety Module		11
4.3 Pressure Fluid Safety Module		11
5. Reference list		12
6. Scope		12
7. General requirements for the GWO CoHE Modules		13
7.1 Overview		13
7.2 Target Group		13
7.3 Aims and Objectives		14
7.4 Duration of the GWO CoHE Standard Modules		14
7.5 Validity Period		15
7.6 Course Codes		15
7.7 Participant Prerequisites for the GWO CoHE Training Standard		15
7.8 Physical Demands		16
7.9 Instructor Qualification Prerequisites		16
8. General resources required to deliver CoHE Modules		16
8.1 Instructor to Participant Ratio		16
8.2 Training Facilities		17
8.3 Training Staff		17
8.4 Equipment		17
9. Using this Standard to Develop Training		17
10. Module 1 – CoHE Basic Safety module		19
10.1 Aims and Objectives for the CoHE Basic Safety Module		19
10.2 Duration of the CoHE Basic Safety Module		19
10.3 CoHE Basic Safety Module Participant Ratio		19
10.4 CoHE Basic Safety Module Timetable		20
10.5 Detailed Description of the CoHE Basic Safety Module		21
Lesson 1 - Introduction to the training		21
ELEMENT 1.1 - Safety instructions and emergency procedures		22
ELEMENT 1.2 - Facilities		22
ELEMENT 1.3 - Introduction		23
ELEMENT 1.4 - Aim and objectives		23
ELEMENT 1.5 - Ongoing assessments		24
ELEMENT 1.6 - Motivation		24
Lesson 2 - Control of hazardous energies basic safety		25
ELEMENT 2.1 - CoHE in the wind industry		26
ELEMENT 2.2 - CoHE roles in the wind industry		28
ELEMENT 2.3 - Housekeeping		30
ELEMENT 2.4 - Basic PPE		30
ELEMENT 2.5 - Protections		31
ELEMENT 2.6 - Emergency stop buttons in a wtg		32
Lesson 3 - Lockout-Tagout for an Ordinary Person		33
ELEMENT 3.1 - Lockout-Tagout in the wind industry		33
ELEMENT 3.2 - Lockout-Tagout roles in the wind industry		35
ELEMENT 3.3 - Lockout-Tagout process		37
Lesson 4 - Mechanical safety		39
ELEMENT 4.1 - Why mechanical safety?		39
ELEMENT 4.2 - Mechanical Safety signs		41
ELEMENT 4.3 - The importance of appropriate isolation		42
Lesson 5 - Electrical safety		43
ELEMENT 5.1 - Why electrical safety?		44
ELEMENT 5.2 - Low / high voltage		45
ELEMENT 5.3 - PE and gfci / rcd		46
ELEMENT 5.4 - Static electricity		49
ELEMENT 5.5 - Electrical Safety signs		49
ELEMENT 5.6 - The importance of appropriate isolation		50
ELEMENT 5.7 - Response to an electrical incident		51
Lesson 6 - Pressure Fluid safety		52
ELEMENT 6.1 - Pressure Fluid Safety		53
ELEMENT 6.2 - Hydraulic oil injections		54
ELEMENT 6.3 - Safety signs		55
ELEMENT 6.4 - The importance of appropriate isolation		56
Lesson 7 - Hazardous energy scenario		57
Lesson 8 - Training review		58
ELEMENT 8.1 - Training review		58
ELEMENT 8.2 - Feedback session		59
11. Module 2 – COHE Electrical Safety		61
11.1 Aims and Objectives of the CoHE Electrical Safety Module		61
11.2 Duration of the CoHE Electrical Safety Module		61
11.3 CoHE Electrical Safety Module - Instructor to Participant Ratio		62
11.4 Equipment for CoHE Electrical Safety Module		62
11.5 CoHE Electrical Safety Module Timetable		62
11.6 Detailed Description of the CoHE Electrical Safety Module		64
Lesson 1 - Introduction to the Training		64
ELEMENT 1.1 - Safety instructions and emergency procedures		64
ELEMENT 1.2 - Facilities		65
ELEMENT 1.3 - Introduction		65
ELEMENT 1.4 - Aim and objectives		66
ELEMENT 1.5 - Ongoing assessment		67
ELEMENT 1.6 - Motivation		67
ELEMENT 1.7 - Human factors		68
Lesson 2 - Responsibilities & role of a Qualified Electrical Person		69
ELEMENT 2.1 - Responsibilities and role of a qualified electrical person		69
Lesson 3 - Electrical PPE		71
ELEMENT 3.1 - Electrical PPE		71
Lesson 4 - Electrical safe working practises		73
ELEMENT 4.1 - How to perform electrical work tasks safely using electrical safe working practices		73
ELEMENT 4.2 - Exposed electrical conductors and circuit parts		77
ELEMENT 4.3 - Approach boundaries		78
ELEMENT 4.4 - Tools		81
ELEMENT 4.5 - Alerting techniques		82
ELEMENT 4.6 - Job briefing/pre-task briefing		83
ELEMENT 4.7 - Deranged equipment		84
ELEMENT 4.8 - Guards and covers		86
ELEMENT 4.9 - Non-contact techniques (infrared inspections)		86
ELEMENT 4.10 - Arc flash		87
Lesson 5 - Electrically safe working conditions		89
ELEMENT 5.1 - Treating all electrical equipment as live until an electrically safe work condition has been established		89
ELEMENT 5.2 - When to establish an electrically safe working condition		90
ELEMENT 5.3 - How to establish an electrically safe working condition		91
Lesson 6 - Testing and isolation		92
ELEMENT 6.1 - Electrical measurement equipment		93
ELEMENT 6.2 - 3-point test method to prove the absence of voltage		95
ELEMENT 6.3 - Isolation of electrical equipment		96
Lesson 7 - Stored energy		97
ELEMENT 7.1 - Hazards related to batteries and capacitors		97
ELEMENT 7.2 - Task-based training for handling batteries and capacitors in a safe manner		99
Lesson 8 - Hazardous electrical safety scenarios		100
Lesson 9 - Training review		102
ELEMENT 9.1 - Training review		102
ELEMENT 9.2 - Feedback session		103
12. Module 3 – COHE Pressure Fluid Safety Module		105
12.1 Aims and Objectives of the CoHE Pressure Fluid Safety Module		105
12.2 Duration of the CoHE Pressure Fluid Safety Module		105
12.3 CoHE Pressure Fluid Safety Module - Instructor to Participant Ratio		106
12.4 Equipment for CoHE Pressure Fluid Safety Module		106
12.5 CoHE Pressure Fluid Safety Module Timetable		106
12.6 Detailed Description of the Pressure Fluid Safety Module		108
Lesson 1 - Introduction to the training		108
ELEMENT 1.1 - Safety instructions and emergency procedures		108
ELEMENT 1.2 - Facilities		109
ELEMENT 1.3 - Introduction		109
ELEMENT 1.4 - Scope and main learning objectives		110
ELEMENT 1.5 - Ongoing assessments (participants assessment form)		110
ELEMENT 1.6 - Motivation		111
ELEMENT 1.7 - Human factors		111
Lesson 2 - Qualified Pressure Fluids Person - Requirements and Role		113
ELEMENT 2.1 - Role and responsibilities of a Qualified Pressure Fluids Person		113
Lesson 3 - Pressure fluid hazards		114
ELEMENT 3.1 - Hazards of fluids under pressure		115
ELEMENT 3.2 - Trapped pressure and stored energy in a pressure system		116
ELEMENT 3.3 - Circumstances in which oil injection is possible into the human body		117
ELEMENT 3.4 - High temperature fluids in pressure systems		117
ELEMENT 3.5 - Hazards with taking an oil sample		118
ELEMENT 3.6 - Hazards related to pre-charging an accumulator		119
ELEMENT 3.7 - Stored energy hazards related to pre-charge pressure in an accumulator		120
Lesson 4 - PPE		121
ELEMENT 4.1 - HYDRAULIC FLUIDS AND FLUIDS UNDER PRESSURE PPE		121
Lesson 5 - Safe work practices		122
ELEMENT 5.1 - Work instructions		123
ELEMENT 5.2 - Pre-task briefing (Also known as toolbox talks)		123
ELEMENT 5.3 - Pre-use check on pressure fluid test equipment and hoses		125
ELEMENT 5.4 - Test for the absence of pressure		126
ELEMENT 5.5 - Safe isolation and safe dissipation of pressure in a pressure system		127
ELEMENT 5.6 - Component replacement in pressure systems		128
ELEMENT 5.7 - Searching for leaks in a pressurised system safely		130
Lesson 6 - Response to pressure fluid incidents		130
Lesson 7 - Hazardous pressure fluid scenarios		132
Lesson 8 - Training Review		134
ELEMENT 8.1 - Training review		134
ELEMENT 8.2 - Feedback session		134
Annex 1 - Equipment list		137
Annex 2 - Template description for a permit to work		140
Annex 3 - Version History		144

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