Mar 2018
Electricity Distribution
ACSS Conductor Study
Mar 2018
Mar 2019
Scottish and Southern Electricity Networks
Tim Sammon
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Network Innovation Allowance

Overhead line conductors both in England and Scotland are predominately Aluminium Conductor

Steel Reinforced (ACSR). Many of these will require replacement in the RIIO-ED2 price control

period. Many of these replacement schemes require increased current carrying ability. Presently to

achieve the increase in current High Temperature Low Sag (HTLS) conductors are being utilised.

Composite cored HLTS conductors have been trialled and, while effective, have exhibited higher

installation risks than those associated with steel core conductors.

Horizon scanning activity has revealed another potential HTLS solution which utilises Aluminium

Conductor Steel Supported (ACSS) conductor technology. This may offer a different cost

performance option and may offer lower installation risk than the composite core conductor


Quantify any benefits available from ACSS.
ACSS H285 to other conductor options in the modelled scenarios.