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

 

Finance: Major Campaign To End "Gross Overtaxation Of Savings"

The campaign – which includes a special web site through which New Zealanders can e-mail their own and other MPs and party leaders – is backed by Age Concern, Consumer NZ, the Financial Services Council and the Taxpayers’ Union. More>>

ALSO:

Scoop Business: Leighton-Led WGP To Build, Manage Transmission Gully

The Wellington Gateway Partnership, led by a unit of ASX-listed Leighton Holdings, has won the $1 billion contract to build the Transmission Gully road north of Wellington. More>>

ALSO:

Gareth Morgan: The Government’s Fresh Water Policy – Revisited

Fresh water quality is the latest area to be in the sights of Gareth Morgan and his research organisation The Morgan Foundation... They found that the fresh water policy was a bit murkier than the Environment Minister let on. More>>

ALSO:

Interest Rates: RBNZ Hikes OCR To 3.5%, ‘Period Of Assessment’ Now Needed

Reserve Bank governor Graeme Wheeler raised the official cash rate as expected, while signalling a pause in rate hikes to assess the impact of moves so far this year. The kiwi dollar sank after Wheeler said its strength was “unjustified” and that the currency could have “a significant fall.” More>>

ALSO:

Fonterra: Canpac Site 'Resize' To Focus More On Paediatrics

Fonterra is looking at realigning its packing operations at Canpac, in the Waikato, to focus more on paediatric nutritionals... The proposed changes could mean around 110 roles may not be required at the site which currently employs 330. More>>

ALSO:

Scoop Business: Postie Plus Brand Gets 2nd Chance With Well-Funded Pepkor

The Postie Plus brand is getting a new lease of life after South Africa’s Pepkor bought the failed retailer’s assets out of administration and said it will use its purchasing power to reduce costs of stock and fatten margins. More>>

ALSO:

Get More From Scoop

 
 
Computer Power Plus

Standards New Zealand

Standards New Zealand
 
 
 
 
 
 
 
 
Business
Search Scoop  
 
 
Powered by Vodafone
NZ independent news