This document discusses covered conductor systems which consist of conductors surrounded by insulating material for protection against accidental contact. It notes covered conductors occupy 40% less space than bare lines and lists some materials used such as XLPE and HDPE. The document provides an overview of different covered conductor system types including spacer cable systems and aerial bundled conductors. It indicates covered conductors have a lower failure rate than bare conductors and discusses reliability and cost comparisons. Finally, it outlines some common accessories used with covered conductor systems such as insulation piercing connectors, tension clamps, and suspension clamps.

1. COVERED
CONDCUTOR SYSTEM

2. 2
COVERED CONDUCTOR
Covered conductors consist of a conductor
surrounded by a covering made of insulating
material as protection against accidental
contacts with other covered conductors and
with grounded parts such as tree branches,
etc.– As BS EN 50397-1: 2006.

3. CAUTION
3
 Conductors must be handled with care
 Only accessories designed and approved for the conductor may be
used
 Arc protection devices must be used on lines vulnerable to over
voltages
 Substations must have tripping earth-fault protection devices and
alarming secondary devices

4. INTERRUPTION FREE ELECTRICITY SUPPLY

5. OCCUPY 40 % LESS SPACE THAN BARE LINES

6. 6
INSULATING MATERIAL:
XLPE (Cross-Linked Polyethylene)
HDPE (High Density Polyethylene)

7. CONDUCTOR MATERIAL
COPPER ALUMINIUM ACSR
7

8. OTHER DIFFERENT
TYPES OF COVERED
CONDUCTOR SYSTEM

9. SPACER CABLE SYSTEM

10. ABC
AERIAL BUNDLE CONDUCTOR

11. Bare conductor - 4.5 faults / 100 km
Covered conductor - 0.9 faults / 100 km
FAILURE RATE
Ref: EA Technology on Covered Conductor System for Distribution

12. BARE COVERED CONDUCTOR SPACER CABLE AERIAL BUNDLED
CABLE
RELIABILITY COST

13. ACCESSORIES OF
COVERED CONDUCTOR
SYSTEM

14. COVER ALUMINIUM SLEEVE
MIDSPAN JOINT FOR COVERED CONDUCTOR

15. INSULATION PIERCING CONNECTOR

16. PARTS
Body – Glass Reinforced Thermoplastic
Bolt & Nut – Galvanized Steel
Piercing Teeth – Tinned Copper
Cap – Glass Reinforced Thermoplastic
Shearing Head – Glass Reinforced Thermoplastic
INSULATION PIERCING CONNECTOR

17. TENSION CLAMP

18. LOW VOLTAGE
AERIAL BUNDLED
CONDUCTOR FITTING

19. INSULATION PIERCING
CONNECTOR
INSULATION
COMPRESSION JOINT

20. SUSPENSION CLAMP
ASSEMBLY
TENSION CLAMP
ASSEMBLY

23. HIGH VOLTAGE AERIAL
BUNDLED CONDUCTOR
FITTING

24. MIDSPAN JOINT FOR BARE MESSENGER
STRAIGHT THROUGH JOINT T-JOINT

25. CABLE TRAY
TENSION CLAMP SUSPENSION CLAMP

26. ARC PROTECTION SYSTEM

27. INTEGRATED INSULATOR – ARC PROTECTION
AND LIGHTNING ARRESTER (IIAPLA)
 Protects lines up to 33 kV against
Direct Lightning and Back Flashover.
 It performs the function of Composite
Insulator and a Lightning Arrestor
simultaneously.
 In-built Rapid Arc Quenching System
THIS PRODUCT IS UNDER DEVELOPMENT IN SUPREME.