This document discusses different types of conductors used in overhead transmission lines. It describes solid conductors which are used in substations for short lengths. Hollow conductors provide better cooling and are also used in substations. Stranded conductors are the most common as they are flexible, easy to transport and install. Specific stranded conductors discussed include AAC, AAAC, ACSR, ACSS, ACCR, and ACCC which differ in their material composition and properties like strength, corrosion resistance and current carrying capacity. New high temperature alloys like TAI and ZTAI can carry higher currents than conventional conductors. Gap type conductors like GTACSR and GZTACSR provide even greater capacity without requiring tower

2. topic : types of conductor in over head transmission line
Batch -- 2
•SHASHANK K N
•AKSHAY
•SANTOSH KUMar n s
•ChHarishma r nayakA
•Tejaswini k
•Darshan b s
•JEEVAN LN

3. AAC AAAC ACSR
ACSS ACCR ACCC
Solid Hollow Stranded
Types of Aluminium Conductors

4. Types of Aluminium Conductors
• Solid Conductor
• Used in substation bus
• Suitable for short length bus

5. Types of Aluminium Conductors
• Solid Conductor

6. Types of Aluminium Conductors
• Hollow Conductor
• Used in substation bus
• Suitable for short length bus
• Better cooling rate

7. Types of Aluminium Conductors
• Hollow Conductor
• Used in substation bus
• Suitable for short length bus
• Better cooling rate

8. Types of Aluminium Conductors
• Stranded Conductor
• Made up of multiple number of strands
• Easy to bend and roll
• Easy to transport

9. Types of Aluminium Conductors
• Stranded Conductor
• It is more flexible than solid
conductor
• Most commonly used
• Easy to transport and use

10. Stranded Aluminium Conductors;
• AAC – All Aluminium Conductor
• All strands of aluminium with purity 99.7%
• High resistant to corrosion
• Installed in coastal areas
• Lowest tensile strength therefore
permit low span length

11. Stranded Aluminium Conductors;
• AAAC – All Aluminium Alloy Conductor
• All strands of aluminium alloy
• Good tensile strength
• Allow more span length than AAC
• Installed at;
• Moderate resistant to corrosion
•
•
•
Railway crossing
River crossing
Hilly areas

12. Stranded Aluminium Conductors;
•ACSR – Aluminium Conductor Steel Reinforced
• Galvanized steel strands at core;
surrounded by aluminium
strands
• High tensile strength
• Moderate expansion
• Higher span length than AAC
and ACSR conductor

13. Types of ACSR Conductors;
33/66 KV
300 A
66/132 KV
480 A
220 KV
735 A
220/400 KV
800 A

14. Types of ACSR Conductors;
Dog
Panther Moose
Zebra

15. Types of ACSR Conductors;
S.No
Operating
Voltage
KV
Name
Of
ACSR
Conductor
Current Carrying
Capacity at 75°C
(Amp)
Size and Stranding Over all
Dia.
cm.
Unit Wt.
Kg/mt
Aluminum
No/mm
Steel
No/mm
1. 33/66 Dog 300 6/4.72 7/1.57 1.42 0.394
2. 66/132 Panther 480 30/3.0 7/3.0 2.10 0.976
3. 220 Zebra 735 54/3.15 7/3.15 2.86 1.62
4. 220/400 Moose 800 54/3.53 7/3.53 3.18 2.02
Dog
Panther Moose
Zebra

16. Stranded Aluminium Conductors
• ACSS – Aluminium Conductor Steel Supported
• ACSS /RW
• ACSS /TW
• Outer strands of Annealed or “0” temper aluminum
• Strength depend of steel strands
• Good working temperature without crossing sag limit
• More current carrying capacity than traditional ACSR conductor

17. Stranded Aluminium Conductors
• ACSS – Aluminium Conductor Steel Supported
• ACSS /RW
• Outer strands of Annealed or “0” temper alumi
• Strength depend of steel strands
• ACSS /TW
• ACSR
• Hard Drawn Aluminium • Annealed or ”0” Tempered

18. Stranded Aluminium Conductors
• ACCR – Aluminium Composite Core Reinforce
• Outer strands; alloys of aluminium-
Zincoronium
• Core strands of advanced
composite material
• High tensile
strength and low
coefficient of
expansion
• High working
temperature without
crossing sag limit
• Double current carrying capacity than traditional ACSR conductor

19. Stranded Aluminium Conductors
• ACCC – Aluminium Carbon Composite Core
• Outer strands; alloys of aluminium-
Zincoronium
• Advanced composite core of
Glass, carbon and epoxy resin
• High tensile strength
• High working temperature
without crossing sag limit
• Double current carrying
capacity than traditional ACSR
conductor

20. (Super) Thermal resistant aluminum alloy [TAI, ZTAI]
Thermal-resistant aluminum alloy (TAI) and Super thermal
resistant aluminum alloy (ZTAI) improve its
thermal-resistant characteristics by adding
zirconium. ZTAI and TAI can keep its tensile
strength in high temperature condition.
TAI can withstand up to 150ºC and
can carry 1.6 times current of Hard drawn
aluminum .
ZTAI can withstand up to 210ºC and can carry 2.0 times
current of Hard drawn aluminum .
Both TAI and ZTAI maintain nearly the same mechanical and
electrical characteristics as Hard drawn aluminum

21. BENEFITS :
•New aluminum alloys having high thermal
resistance can carry 50%-60% more current than
ACSR of the same size, while maximum sag and
maximum working tension remains almost the
same as that of ACSR.
● Higher capacity new lines can be built to deal
with future demands.

22. (GTACSR)Gap type thermal-resistant
aluminum alloy conductor steel
reinforced
(GZTACSR)Gap type super thermal-
resistant aluminum alloy conductor steel
reinforced

23. GTACSR/GZTACSR has a unique construction featuring a small gap between the
steel core and (super) thermal-resistant aluminum alloy layer. The combination of
the (super) thermal resistant aluminum alloy and the "Gap construction" offers
excellent sag and current-carrying characteristics. With this advantage,
GTACSR/GZTACSR is useful to up-rate an existing transmission line by simply
replacing the existing conductor to GTACSR/GZTACSR
Advantage
• Double the current-carrying capacity for the same size conductor
• No modification or reinforcement required for existing towers.
• Low cost and short construction period.

24. This presentation
is done under the
Guidance of​
Dr. Sheila H​
Associate Professor,​
Department of EEE​
VVIET, Mysuru