1 Table of contents 114

20250324 HV V0 DRAFT

1. List of Abbreviations		4
2. Terms and Definitions		5
3. Change Log		7
4. Scope		8
5. General requirements for the high voltage standard		8
5.1 Overview		8
5.2 Target Groups		8
5.3 Aims and Objectives		9
5.4 Duration of the High Voltage Standard Modules		9
5.5 Validity Period		10
5.6 Course Codes		10
5.7 Participant Prerequisites		10
5.8 Instructor Qualification Prerequisites		11
6. Using this Standard to Develop Training		12
6.1 Lesson planning		12
6.2 Participant Performance Assessment		12
6.3 Alignment References		12
7. High Voltage Operations		15
7.1 Aims and objectives for the High Voltage Operations Module		15
7.2 Generic approach to GWO High Voltage Operations training and the need for further regional, company and site-specific specific development		15
7.3 Progression following completion of GWO High Voltage Operations Module		15
7.4 Duration of the High Voltage Operations Module		16
7.5 Instructor to Participant Ratio for High Voltage Operations Module		16
7.6 Equipment for the High Voltage Operations Module		16
7.7 Timetable for the High Voltage Operations Module		17
7.8 Detailed Description of the High Voltage Operations Module		19
Lesson 1 - Module introduction		19
ELEMENT 1.1 - Safety instructions and emergency procedures		19
ELEMENT 1.2 - Facilities		20
ELEMENT 1.3 - Introduction		20
ELEMENT 1.4 - Aim and objectives		21
ELEMENT 1.5 - Ongoing and summative assessments		22
ELEMENT 1.6 - Motivation		22
Lesson 2 - Human factors, safety mindset and attitude		23
ELEMENT 2.1 - The role of human factors in safe operations		23
ELEMENT 2.2 - Holistic integration of human factors into all topics		24
Lesson 3 - Wind farm HV energy systems and equipment		26
ELEMENT 3.1 - HV systems in the wind farm from WTG to grid		26
ELEMENT 3.2 - Definition and designations of HV		27
ELEMENT 3.3 - HV equipment and technologies overview		27
ELEMENT 3.4 - Circuit Breakers, Disconnectors, Earth Switches		28
ELEMENT 3.5 - HV versus LV: Arcing hazards and safety		29
ELEMENT 3.6 - Environmental conditions affecting HV versus LV		30
Lesson 4 - Hazards and risks awareness in HV Environments		31
ELEMENT 4.1 - Hazards, risks and controls when working with HV equipment		31
ELEMENT 4.2 - Basement housed HV equipment		32
ELEMENT 4.3 - HV cable hazards and risks		32
ELEMENT 4.4 - Earthing protection		33
ELEMENT 4.5 - Operating under different conditions		34
ELEMENT 4.6 - Recognising signs of deranged or in distress equipment		34
Lesson 5 - Safety and control measures in HV environments		35
ELEMENT 5.1 - Five Basic Safety Rules / The Golden Five Rules		35
ELEMENT 5.2 - Establishing an Electrically Safe Work Condition		36
Lesson 6 - Regulations, guidelines and company HV rules		37
ELEMENT 6.1 - Legislation, industry standards and guidelines, company rules for HV work		37
Lesson 7 - SSOW for HV operations and communications		38
ELEMENT 7.1 - SSOW for HV operations and communications		38
Lesson 8 - Duties, roles and responsibilities for HV operations		40
ELEMENT 8.1 - Duties, roles and responsibilities for HV operations		40
Lesson 9 - Tools and PPE for High Voltage working		41
ELEMENT 9.1 - Typical HV tools, functions, safe use and control		41
Lesson 10 - Fundamentals and principles for operating High Voltage systems under a SSOW		42
ELEMENT 10.1 - Roles and responsibilities in controlled HV environment		43
ELEMENT 10.2 - Applying the Five Safety Rules / The Golden Five		44
ELEMENT 10.3 - Documentation to ensure safe control of HV Operations		45
ELEMENT 10.4 - Executing work under documents written by an SAP		46
Lesson 11 - HV Switching: Scenario based practical activities		46
ELEMENT 11.1 - Safe Practices and Principles of switching including team communications and the Hierarchy of Switching		47
ELEMENT 11.2 - Performing initial energisation at commissioning and reenergisation following repairs		49
ELEMENT 11.3 - Working with remote operation centre / stations		50
ELEMENT 11.4 - Carry out actions within a HV safety document or switching orders		50
ELEMENT 11.5 - Identify critical to safety intervention points and notify appropriate authorities of improper operation		51
ELEMENT 11.6 - Scenario based practical activities - HV Switching		52
Lesson 12 - Tools, equipment and methods for confirming Absence of Voltage		53
ELEMENT 12.1 - HV tools and PPE for confirming absence of voltage		54
ELEMENT 12.2 - Methods for confirming absence of voltage - Primary and secondary, or additional methods		55
ELEMENT 12.3 - Prove - Test - Prove / Hot - Cold - Hold		56
Lesson 13 - Applying HV Isolations and Earth		57
ELEMENT 13.1 - Applying HV Isolations and Earth		57
ELEMENT 13.2 - Scenario based practical activities - HV Isolations and earth		58
Lesson 14 - Safe control during HV testing		59
ELEMENT 14.1 - Sanction for test		60
ELEMENT 14.2 - Awareness of testing types, tools, equipment and associated devices		61
ELEMENT 14.3 - Safe control of HV equipment during testing activity		62
ELEMENT 14.4 - Scenario based practical activities - HV testing		63
Lesson 15 - Written knowledge test		64
ELEMENT 15.1 - Assessment of knowledge by written test		64
Lesson 16 - Training review		65
ELEMENT 16.1 - Training review		65
ELEMENT 16.2 - Feedback session		66
ELEMENT 16.3 - HV Operations - Personal Experience Logbook		66
8. High Voltage Cable Pulling		69
8.1 Aims and objectives of the High Voltage Cable Pulling Module		69
8.2 Duration of the High Voltage Cable Pulling		69
8.3 Instructor to Participant Ratio for the High Voltage Cable Pulling Module		69
8.4 Equipment Requirements of the High Voltage Cable Pulling Module		70
8.5 Timetable of the High Voltage Cable Pulling Module		70
8.6 Detailed Description of the High Voltage Cable Pulling Module		71
Lesson 1 - Module introduction		71
ELEMENT 1.1 - Safety instructions and emergency procedures		72
ELEMENT 1.2 - Facilities		72
ELEMENT 1.3 - Introduction		73
ELEMENT 1.4 - Aim and objectives		73
ELEMENT 1.5 - Ongoing assessments		74
ELEMENT 1.6 - Motivation		74
ELEMENT 1.7 - Human factors		75
Lesson 2 - Awareness of basic HV cable theory		76
ELEMENT 2.1 - Understanding what happens to a cable when it is pulled		77
ELEMENT 2.2 - Different HV cable types, applications and specifications		77
ELEMENT 2.3 - Cable construction from core to outer layer		78
ELEMENT 2.4 - Awareness of basic electrical field theory		79
ELEMENT 2.5 - Awareness of HV cable testing		79
Lesson 3 - Breakout inspections		80
ELEMENT 3.1 - Breakout inspection key points		80
ELEMENT 3.2 - Recognising a good and bad breakout		82
ELEMENT 3.3 - Reporting any problems		82
Lesson 4 - Cable inspection		83
ELEMENT 4.1 - Inspecting the cable for damage during pulling operations		83
Lesson 5 - Safe working during HV cable pulling operations		84
ELEMENT 5.1 - Safe work practices and effective team coordination		85
ELEMENT 5.2 - Hazard awareness and mitigation		86
Lesson 6 - Preparation of HV cable, equipment and tools		88
ELEMENT 6.1 - Preparation and protection of HV cable		89
ELEMENT 6.2 - Preparation of equipment and tools		90
Lesson 7 - Handling the HV cable		91
ELEMENT 7.1 - Installation of cable socks		92
ELEMENT 7.2 - HV cable handling and stress control		93
Lesson 8 - Conducting the cable pulling operation		94
ELEMENT 8.1 - How to pull a HV cable - methods and techniques		94
ELEMENT 8.2 - Attention during cable pulling - do's and don'ts		95
Lesson 9 - Completing the cable pull		96
ELEMENT 9.1 - Cable fastening		96
ELEMENT 9.2 - Installation of the cable loop in tower and walk down inspection		97
Lesson 10 - Training review		98
ELEMENT 10.1 - Training review		98
ELEMENT 10.2 - Feedback session		99
Annex 1 - Equipment list		101
Annex 2 - HV Operations - Personal Experience Logbook		104
Annex 3 - Alignment references		105
Annex 4 - Guidline for warm-up exercises		107
Annex 5 - Version History		114

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