Video | Agriculture | Confidence | Economy | Energy | Employment | Finance | Media | Property | RBNZ | Science | SOEs | Tax | Technology | Telecoms | Tourism | Transport | Search

 

Unison Trials Innovative Conductor Condition Assessment Tool

Unison Trials Innovative Conductor Condition Assessment Tool

18 March 2014 – Unison has become the first distribution company in the world to trial a unique device on 11kV lines, as part of a trial aimed at enhancing Unison’s asset management programme.

The ‘Cormon’ unit, one of only three world-wide, was used to perform condition assessments on one of the main types of conductor on Unison’s network last week, providing information that will help to determine the remaining life of the assets.

“Working alongside service provider LineTech, we have been using the unit to test 11kV and 33kV lines,” said Unison General Manager Networks & Operations, Jaun Park.

“The results from this trial will determine if the technology would be a suitable addition to our Asset Condition and Health Assessment programme, which aims to extend the lifecycle of assets, and defer capital expenditure for the benefit of our customers.”

The unit is mainly used on transmission lines, with limited testing to date on 33kV lines. Unison will be the first distribution company globally to test both 33kV and 11kV lines.

“The unit assesses the condition of the line millimetre by millimetre, using a high frequency signal to induce small currents in the conductor as it works its way along the full length of the live lines, detecting areas where corrosion could occur.”

Unison used the unit on ‘ACSR’ conductors, which stands for ‘Aluminium Conductor, Steel Reinforced’. ACSR cable consists of aluminium - a good conductor of electricity but of relatively low mechanical strength – strengthened with steel strands.

“Inside ACSR conductor there is a layer of zinc, which acts as a protective galvanised coating on the steel. The zinc prevents a chemical reaction between the steel and aluminium, but over time the zinc erodes away, and eventually the aluminium starts to react with the bare steel and corrode.

“The Cormon unit detects how much of that protective layer of zinc coating is left inside the conductor, enabling us to have a much better insight into how much useful remaining life the asset has, rather than replacing the asset on a life-expectancy basis. This will defer capital expenditure as well as help us to conduct maintenance before the asset fails, causing disruption to our customers.”

Unison has now started analysing the results of the tests to determine if the tool will be incorporated into Unison’s Asset Condition and Health Assessment work.

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Skodafone Goneski: Sky TV, Vodafone Drop $3.44 Billion Merger Plan

Sky Network Television and Vodafone New Zealand have terminated their merger agreement which aimed to create the country's largest telecommunications and media group, and have withdrawn an appeal against the Commerce Commission's rejection of the plan. More>>

Quake Insurance: Reforms To EQC Act Announced

· Increasing the monetary cap from $100,000 (plus GST) to $150,000 (plus GST) for EQC building cover.
· Clarifying EQC land cover is for natural disaster damage that directly affects the insured residence or access to it... More>>

ALSO:

Reserve Bank: Official Cash Rate Unchanged At 1.75 Percent

Global economic growth has increased and become more broad-based. However, major challenges remain with on-going surplus capacity and extensive political uncertainty... More>>

Kaikōura Earthquake: Private Insurers Receive $1.8b Claims

Insurance Council Chief Executive Tim Grafton said most is for commercial loss at $1.36 billion, with residential claims amounting to over $460 million. “...We have a high level of confidence that most people will have received settlement offers by the end of this year." More>>

ALSO:

Forms And Data: New Proposals To Simplify Personal Income Tax

The Government is proposing to make tax simpler for individuals, with people whose only income is from a salary, wages or investments no longer being required to file tax returns to receive tax refunds or to calculate any additional tax. More>>