1 Table of contents 120

20250702 HV V1

1. List of Abbreviations		4
2. Terms and Definitions		5
3. Change Log		9
4. Scope		10
5. General requirements for the high voltage standard		10
5.1 Overview		10
5.2 Target Groups		10
5.3 Aims and Objectives		11
5.4 Duration of the High Voltage Standard Modules		11
5.5 Validity Period		12
5.6 Course Codes		12
5.7 Participant Prerequisites		12
5.8 Instructor Qualification Prerequisites		13
6. Using this Standard to Develop Training		14
6.1 Lesson planning		14
6.2 Participant Performance Assessment		14
6.3 Alignment References		15
7. High Voltage Operations		17
7.1 Aims and objectives for the High Voltage Operations Module		17
7.2 Generic approach to High Voltage Operations training and the need for company specific development		17
7.3 Progression following completion of GWO High Voltage Operations Module		17
7.4 Duration of the High Voltage Operations Module		18
7.5 Instructor to Participant Ratio for High Voltage Operations Module		18
7.6 Equipment for the High Voltage Operations Module		18
7.7 Timetable for the High Voltage Operations Module		19
7.8 Detailed Description of the High Voltage Operations Module		21
Lesson 1 - Module introduction		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 and summative assessments		24
ELEMENT 1.6 - Motivation		24
Lesson 2 - Human factors, safety mindset and attitude		25
ELEMENT 2.1 - The role of human factors in safe operations		25
ELEMENT 2.2 - Holistic integration of human factors into all topics		26
Lesson 3 - Wind farm HV energy systems and equipment		28
ELEMENT 3.1 - HV systems in the wind farm from WTG to grid		28
ELEMENT 3.2 - Definition and designations of HV		29
ELEMENT 3.3 - HV equipment and technologies overview		29
ELEMENT 3.4 - Circuit Breakers, Disconnectors, Earth Switches		30
ELEMENT 3.5 - Using Single Line Diagrams		31
ELEMENT 3.6 - Hazards and safety of HV versus LV		32
ELEMENT 3.7 - Environmental conditions affecting HV versus LV		32
Lesson 4 - Hazards and risks awareness in HV Environments		33
ELEMENT 4.1 - Hazards, risks and controls when working with HV equipment		33
ELEMENT 4.2 - Basement housed HV equipment		35
ELEMENT 4.3 - HV cable hazards and risks		35
ELEMENT 4.4 - Earthing protection		36
ELEMENT 4.5 - Operating under different conditions		36
ELEMENT 4.6 - Recognising signs of deranged or in distress equipment		37
Lesson 5 - Safety and control measures in HV environments		38
ELEMENT 5.1 - Five Basic Safety Rules / The Golden Five Rules		38
ELEMENT 5.2 - Establishing an Electrically Safe Work Condition		39
Lesson 6 - Regulations, guidelines and company HV rules		40
ELEMENT 6.1 - Legislation, industry standards and guidelines, company rules for HV work		40
Lesson 7 - SSOW for HV operations and communications		41
ELEMENT 7.1 - SSOW for HV operations		41
ELEMENT 7.2 - Effective communications in HV Operations		43
Lesson 8 - Duties, roles and responsibilities for HV operations		43
ELEMENT 8.1 - Duties, roles and responsibilities for HV operations		44
Lesson 9 - Tools and PPE for High Voltage working		44
ELEMENT 9.1 - Typical HV tools, functions, safe use and control		45
ELEMENT 9.2 - PPE for high voltage working		46
Lesson 10 - Fundamentals and principles for operating High Voltage systems under a SSOW		46
ELEMENT 10.1 - Roles and responsibilities in controlled HV environment		47
ELEMENT 10.2 - Applying the Five Safety Rules / The Golden Five		48
ELEMENT 10.3 - Documentation to ensure safe control of HV Operations		49
ELEMENT 10.4 - Executing work under documents written by an SAP		50
Lesson 11 - HV Switching: Scenario based practical activities		51
ELEMENT 11.1 - Safe Practices and Principles of switching including team communications and the Hierarchy of Switching		51
ELEMENT 11.2 - Performing initial energisation at commissioning and reenergisation following repairs		53
ELEMENT 11.3 - Working with remote operation centre / stations		54
ELEMENT 11.4 - Carry out actions within a HV safety document or switching orders		55
ELEMENT 11.5 - Identify critical to safety intervention points and notify appropriate authorities of improper operation		56
ELEMENT 11.6 - Scenario based practical activities - HV Switching		57
Lesson 12 - Tools, equipment and methods for confirming Absence of Voltage		58
ELEMENT 12.1 - HV tools and PPE for confirming absence of voltage		58
ELEMENT 12.2 - Methods for confirming absence of voltage - Primary and secondary, or additional methods		59
ELEMENT 12.3 - Prove - Test - Prove / Hot - Cold - Hot		60
Lesson 13 - Applying HV Isolations and Earth		61
ELEMENT 13.1 - Applying HV Isolations and Earth		62
ELEMENT 13.2 - Scenario based practical activities - HV Isolations and earth		63
Lesson 14 - Safe control during HV testing		64
ELEMENT 14.1 - Sanction for test		64
ELEMENT 14.2 - Awareness of testing types, tools, equipment and associated devices		66
ELEMENT 14.3 - Safe control of HV equipment during testing activity		67
ELEMENT 14.4 - Scenario based practical activities - HV testing		68
Lesson 15 - Written knowledge test		69
ELEMENT 15.1 - Assessment of knowledge by written test		69
Lesson 16 - Training review		70
ELEMENT 16.1 - Training review		70
ELEMENT 16.2 - Feedback session		71
ELEMENT 16.3 - HV Operations - Personal Experience Logbook		71
8. High Voltage Cable Pulling		74
8.1 Aims and objectives of the High Voltage Cable Pulling Module		74
8.2 Duration of the High Voltage Cable Pulling		74
8.3 Instructor to Participant Ratio for the High Voltage Cable Pulling Module		74
8.4 Equipment Requirements of the High Voltage Cable Pulling Module		75
8.5 Timetable of the High Voltage Cable Pulling Module		75
8.6 Detailed Description of the High Voltage Cable Pulling Module		76
Lesson 1 - Module introduction		76
ELEMENT 1.1 - Safety instructions and emergency procedures		77
ELEMENT 1.2 - Facilities		77
ELEMENT 1.3 - Introduction		78
ELEMENT 1.4 - Aim and objectives		78
ELEMENT 1.5 - Ongoing assessments		79
ELEMENT 1.6 - Motivation		79
ELEMENT 1.7 - Human factors		80
Lesson 2 - Awareness of basic HV cable theory		81
ELEMENT 2.1 - Understanding what happens to a cable when it is pulled		82
ELEMENT 2.2 - Different HV cable types, applications and specifications		83
ELEMENT 2.3 - Cable construction from core to outer layer		84
ELEMENT 2.4 - Awareness of basic electrical field theory		84
ELEMENT 2.5 - Awareness of HV cable testing		85
Lesson 3 - Breakout inspections		85
ELEMENT 3.1 - Breakout inspection key points		86
ELEMENT 3.2 - Recognising a good and bad breakout		87
ELEMENT 3.3 - Reporting any problems		88
Lesson 4 - Cable inspection		89
ELEMENT 4.1 - Inspecting the cable for damage during pulling operations		89
Lesson 5 - Safe working during HV cable pulling operations		90
ELEMENT 5.1 - Safe work practices and effective team coordination		90
ELEMENT 5.2 - Hazard awareness and mitigation		91
Lesson 6 - Preparation of HV cable, equipment and tools		94
ELEMENT 6.1 - Preparation and protection of HV cable		94
ELEMENT 6.2 - Preparation of equipment and tools		95
Lesson 7 - Handling the HV cable		97
ELEMENT 7.1 - Installation of cable socks		97
ELEMENT 7.2 - HV cable handling and stress control		98
Lesson 8 - Conducting the cable pulling operation		100
ELEMENT 8.1 - How to pull a HV cable - methods and techniques		100
ELEMENT 8.2 - Attention during cable pulling - do's and don'ts		101
Lesson 9 - Completing the cable pull		102
ELEMENT 9.1 - Cable fastening		102
ELEMENT 9.2 - Installation of the cable loop in tower and walk down inspection		103
Lesson 10 - Training review		104
ELEMENT 10.1 - Training review		104
ELEMENT 10.2 - Feedback session		104
Annex 1 - Equipment list		107
Annex 2 - HV Operations - Personal Experience Logbook		110
Annex 3 - Alignment references		111
Annex 4 - Guidline for warm-up exercises		113
Annex 5 - Version History		120

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