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

 

Media: Julian Wilcox Leaves Māori TV

Māori Television has confirmed the resignation of Head of News and Production Julian Wilcox. Mr Maxwell acknowledged Mr Wilcox’s significant contribution to Māori Television since joining the organisation in 2004. More>>

ALSO:

Genetics: New Heat Tolerant Cow Developed

Hamilton, New Zealand-based Dairy Solutionz Ltd has led an expert genetics team to develop a new dairy cow breed conditioned to thrive in lower elevation tropical climates and achieve high milk production under heat stress. More>>

Fractals: Thousands More Business Cards Needed To Build Giant Sponge

New Zealand is taking part in a global event this weekend to build a Menger Sponge using 15 million business cards but local organisers say they are thousands of business cards short. More>>

Scoop Business: NZ Net Migration Rises To Annual Record In September

New Zealand’s annual net migration rose to a record in September, beating government forecasts, as the inflow was spurred by student arrivals from India and Kiwis returning home from Australia. More>>

ALSO:

Scoop Business: Fletcher To Close Its Christchurch Insulation Plant, Cut 29 Jobs

Fletcher Building, New Zealand’s largest listed company, will close its Christchurch insulation factory, as it consolidates its Tasman Insulations operations in a “highly competitive market”. More>>

ALSO:

Scoop Business: Novartis Adds Nine New Treatments Under Pharmac Deal

Novartis New Zealand, the local unit of the global pharmaceuticals firm, has added nine new treatments in a far-ranging agreement with government drug buying agency, Pharmac. More>>

ALSO:

Crown Accounts: English Wary On Tax Take, Could Threaten Surplus

Finance Minister Bill English is warning the tax take may come in below forecast in the current financial year, as figures released today confirm it was short by nearly $1 billion in the year to June 30 and English warned of the potential impact of slumping receipts from agricultural exports. More>>

ALSO:

Auckland Outage: Power Mostly Restored Overnight

Vector wishes to advise that all but 324 customers have been restored overnight. These customers are spread throughout the network in small pockets. The main St Johns feeder was restored around midnight allowing most of the customers in all affected areas to have power this morning. More>>

ALSO:

Get More From Scoop

 
 
Standards New Zealand

Standards New Zealand

Mosh Social Media
 
 
 
 
 
 
 
 
Business
Search Scoop  
 
 
Powered by Vodafone
NZ independent news