Certified HV/MV Cable Splicing, Jointing & Termination

Course Introduction

The range of voltage and capacity of power transmitted through cables is showing a steady increase over the years. Environmental concerns, aesthetic issues, lack of transmission corridors and difficulty in routing overhead lines in crowded human habitats are some of the reasons for the explosive growth of cable technology well into the new voltage range. Due to physical limits on cable lengths for manufacturing and packaging, joints in cable become inevitable, particularly in the context of the utility sector. The cables needto be also terminated at sending and receiving end equipment, a very wide variety of them, in utility as wellas industry applications and these calls for appropriate cable termination accessories.

Cable terminations and joints form the weakest link in any distribution system. Also, a failed joint in an underground distribution system is much more difficult to locate and repair compared to any similar problem in overhead distribution systems. This means that we should do our utmost to achieve a good joint or termination, which can give years of trouble-free service.

The quality of a joint or termination depends to a large extent on the skill of cable jointer/splicer.The aim of a cable jointer/splicer must therefore be to obtain a joint which electrical property are as good as the original cable both in electrical and mechanical terms. The design of cable splicing, jointing and terminationaccessories is based on this perception. Dependence on operator-skill is sought to be reduced to the extentpossible by good choice and quality of jointing materials, though such dependence cannot be totally eliminated.

This intensive training course is designed to provide participants with a detailed and an up-to-date overviewof HV/MV cable splicing, jointing, terminating and QA/QC. It covers the cable jointing and the different types of cables, insulation materials, terminations and joints; the construction of cables, conductor materials and configurations; the different applications and voltages of cables; the various types of cable connectors, materials and method of connection; the theory of joints and terminations; the stress control and the effect of joints and terminations on stress gradients; the areas requiring stress control; the cable jointing, splicing, testing and termination; the applicable standards, types of tests, routine tests and its limitations; the training and certification of personnel involved; the reasons for cable failures and analysis of failures with a predictive approach; and the new trends and technologies utilized in the industry.

Objectives

By the end of the training, participants will be able to:

• Get certified as a “Certified MV/HV Cable Splicing/Termination QA/QC”
• Discuss cable jointing and the different types of cables, insulation materials, terminations and joints
• Describe the construction of cables, conductor materials and configurations, the different applications and voltages of cables
• Identify the various types of cable connectors, materials and method of connection
• Apply the theory of joints and terminations
• Calculate stress control and determine the effect of joints and terminations on stress gradients and the areas requiring stress control
• Practice cable jointing, splicing, testing and terminating
• Implement the applicable standards, the types of tests, routine tests and its
• limitations and the training and certification of personnel involved
• Find reasons for cable failures and perform analysis of failures with a predictive approach

Training Methodology

This interactive training course includes the following training methodologies as a percentage of the total tuition hours:-

• 30% Lectures, Concepts, Role Play
• 70% Workshops & Work Presentations, Techniques, Based on Case Studies & Practical Exercises, Software & General Discussions
• Pre and Post Test

Daily Topics

DAY I.

• PRE-TEST
• Introduction
• Course Overview
  • Need for Cable Joints and Terminations, Cables- Historic Perspective, Types of Cables
  • Types of Insulation Materials, Basic Types of Terminations and Joints
  • Installation Aspects; Reducing the Number of Joints by Proper Planning
  • Standards, Testing and Failures
• Cables
  • Basic Construction, Conductor Materials and Configurations
  • Insulation Materials for Different Applications and Voltages, Use of Screen in HV Cables
  • Use of Armor for Ground Continuity and Mechanical Protection
  • Special Aspects of Single Core Cables
  • Voltage Rating of Cables and Impact of System Grounding Method on Voltage RatingStress Distribution in Single Core and
  • Multi-Core Power Cables Electrical Breakdown of Insulating Materials
  • MV Cables, HV Cables, Using XLPE Insulation
  • Treeing in XLPE and Need for End Sealing of Cables in Storage
  • Basic Manufacturing Process

 DAY II.

• PRE-TEST
• Introduction
• Course Overview
  • Need for Cable Joints and Terminations, Cables- Historic Perspective, Types of Cables
  • Types of Insulation Materials, Basic Types of Terminations and Joints
  • Installation Aspects; Reducing the Number of Joints by Proper Planning
  • Standards, Testing and Failures
• Cables
  • Basic Construction, Conductor Materials and Configurations
  • Insulation Materials for Different Applications and Voltages, Use of Screen in HV Cables
  • Use of Armor for Ground Continuity and Mechanical Protection
  • Special Aspects of Single Core Cables
  • Voltage Rating of Cables and Impact of System Grounding Method on Voltage RatingStress Distribution in Single Core and
  • Multi-Core Power Cables Electrical Breakdown of Insulating Materials
  • MV Cables, HV Cables, Using XLPE Insulation
  • Treeing in XLPE and Need for End Sealing of Cables in Storage
  • Basic Manufacturing Process

• Cable Connectors
  • Materials, Types of Connectors for Cable Terminations and Joints, Current Path
  • Method of Connections, Comparison
  • Contact Resistance, Preferred Methods in Practice for Different Cable Ratings
  • Contact of Dissimilar Materials and Galvanic Effects; Use of Bi-Metal Accessories
• Joints and Terminations-Theory
  • Basic Approaches, Broad Classification of Joints/Termination Approach
  • Comparative Merits, Prefabricated Site Fabricated
  • Additional Requirements of Outdoor Terminations, Reconstitution of Cable Properties

• Connectivity for Cable Screen and Armor, Mechanical Protection of Joints and Terminations
• Practical Session #1

DAY III.

• Stress Control
  • Effect of Joints and Terminations on Stress Gradients
  • Areas Requiring Stress Control, Basics of Stress Control Approach
• Jointing and Termination Practice
  • Kits for Joints and Terminations, Shelf Life Issues
  • Importance of Matching Diameter of Insulated Conductor with Kit Specifications in Pre-Fabricated Kits
  • Preparation of Cable for Termination and Jointing Connection
  • Reconstitution of Cable Properties, Continuity and Grounding Aspects, Sealing
  • Healthiness of Joint/Termination, Installation Aspects for Joints, Access for Repairs
• Practical Session #2

DAY IV.

• Standards and Testing
  • International/National Standards, Type Tests
  • Limitations Routine Tests, Training and Certification of Personnel
• Terminations to Equipment
  • Terminations to Indoor Switchgear, Terminations to Electrical Machines
  • Termination of Outdoor HV Installations, Terminations to GIS Installations
  • Importance of Correct Orientation of Terminations
• Practical Session #3

DAY V.

• Standards and Testing
  • International/National Standards, Type Tests
  • Limitations Routine Tests, Training and Certification of Personnel
• Terminations to Equipment
  • Terminations to Indoor Switchgear, Terminations to Electrical Machines
  • Termination of Outdoor HV Installations, Terminations to GIS Installations
  • Importance of Correct Orientation of Terminations
• Practical Session #3
• Failures and Analysis
  • Reasons for Failures, Documentation of Work, Documentation of Failures
  • Analysis of Failures, Predictive Approach
• New Trends
  • Reasons for Increasing Preference to Underground Cables
  • New Technologies for Very High Capacities and Voltages, EHV XLPE
  • High Temperature, Superconductivity in Cables and Likely Impact on Current Practices
• Course Conclusion
• POST-TEST and EVALUATION

For registration & more information please contact

NAYEL Training Centre 

T: +971 4 379 7245 | M: +971 50 249 6876 WhatsApp +971 50 249 6876

Email [email protected]