Unison Networks

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Unison Networks
IndustryElectricity distribution
PredecessorHawke's Bay Electric Power Board
Founded1924
Headquarters
Hastings
,
New Zealand
Area served
Hawkes Bay, Rotorua, Taupo
Key people
Kevin Atkinson (Chair)
Ken Sutherland (CEO)
Revenue$210m[1]
$27m[1]
Total assets$721m[1]
Total equity$343m[1]
ParentHawke's Bay Power Consumers' Trust
Websitewww.unison.co.nz

Unison Networks Limited (Unison) is an electricity distribution and fibre optic network company, based in Hastings, New Zealand.

Unison owns and manages the electricity lines network and the fibre optic network in the Hawke's Bay, Rotorua and Taupo regions. The service area covers 12,000 km2.[2] The Unison group also provides electrical, fibre, civil, and vegetation contracting services; manufactures electrical products; and operates an insurance company.[1]

Ownership[]

The company is 100% owned by the Hawke's Bay Power Consumers' Trust on behalf of electricity consumers in the Hawke's Bay area. The Trust is made up of five elected Trustees and operates under a Trust Deed.[3]

Distribution network[]

The Unison subtransmission and distribution network is supplied from the national grid via Transpower substations. Seven Transpower grid exit points (GXPs) supply the Unison network: Redclyffe, Fernhill, and Whakatu for Napier-Hastings; Wairakei for Taupo; and Rotorua, Owhata, and Takurenga for Rotorua.

Network statistics[]

Unison Networks Limited network statistics as of 31 March 2015[4]
Parameter Value
Napier-Hastings Rotorua & Taupo Total
Total system length 5,503 km 3,500 km 9,002 km
33 kV 288 km 198 km 487 km
11 kV 2,471 km 2,049 km 4,520 km
Single wire earth return (SWER) 2 km 124 km 126 km
Low voltage (230/400 V) 2,741 km 1,128 km 3,845 km
Street lighting 996 km 674 km 1,670 km
Customer connections 63,157 47,888 111,045
System Maximum Demand 192 MW 162 MW 354 MW
Total Energy Delivered 983 GWh 693 GWh 1,676 GWh

Network performance[]

Unison reported the normalised performance of the network for the 2014/15 year as follows:[1]

Parameter Value
Napier-Hastings Rotorua & Taupo Total
System Average Interruption Duration Index (SAIDI) 89.6 mins 149.2 mins 115.3 mins
System Average Interruption Frequency Index (SAIFI) 1.74 2.29 1.97

History[]

Early in the twentieth century, electricity generation and distribution was managed by local councils or municipal departments. An electricity network was established in Hastings in 1912, with a power house in Eastbourne Street. Following changes to national legislation, the Hawke's Bay Electric Power Board was formed in 1924.[5]

Subsidiaries[]

  • Unison Contracting Services Limited
  • Unison Energy Limited
  • Unison Fibre Limited
  • Unison Insurance Limited
  • ETEL Limited

See also[]

References[]

  1. ^ a b c d e f "Annual Report 2015". Unison. 4 November 2015.
  2. ^ "Asset Management Plan 2015" (PDF). Unison. 30 March 2015.
  3. ^ "Hawke's Bay Power Consumers' Trust". Unison. Retrieved 21 January 2016.
  4. ^ "EDB Information Disclosure - Unison Networks Limited - year ending 31 March 2016" (PDF). 31 August 2016. Retrieved 19 August 2017.
  5. ^ "Unison's History". Unison.

External links[]

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