New Zealand Gazette – 1998 – No. 155

Page 3710

✨ Energy Efficiency Performance Measures



3710 NEW ZEALAND GAZETTE No. 155

  1. The SAIFI for the total number of interruptions within each interruption class:
Network or Generation Owner Classification Interruption per Connected Customer (%)
1998
MainPower Planned Shut-Down (Class B) 0.45
Unplanned Interruption (Class C) 3.23
Transpower Planned Shut-Down (Class A) -
Unplanned Interruption (Class D) -
Generation ECNZ Unplanned Interruption (Class E) -
Generation Other Unplanned Interruption (Class F) -
Other Other Interruptions (Class G) -
Unplanned Interruption (Class G) -
  1. The CAIDI for the total of all interruptions:
1998 1997 1996 1995
61.08 64.39 143.07 69.94
  1. The CAIDI for the total number of interruptions within each interruption class:
Network or Generation Owner Classification Minutes per Customer Interruption
1998
MainPower Planned Shut-Down (Class B) 111.11
Unplanned Interruption (Class C) 54.12
Transpower Planned Shut-Down (Class A) -
Unplanned Interruption (Class D) -
Generation ECNZ Unplanned Interruption (Class E) -
Generation Other Unplanned Interruption (Class F) -
Other Other Interruptions (Class G) -
Unplanned Interruption (Class G) -

RULES FOR DATA ASSEMBLY PURSUANT TO REGULATION 16

  1. Only interruptions arising from incidents at voltages of 3.3kV or greater which cause a loss of supply to customers are included.

  2. The operation of a high voltage fuse supplying a three phase transformer is included.

  3. An interruption to a customer is a loss of supply to a metered installation within the customer’s premises.

  4. The number of customers interrupted is determined by computer analysis of known customers at each distribution transformer affected.

  5. Data is not subdivided into urban-rural density classification.

  6. The interruption time is the time taken to restore supply to 100% of affected customers.

  7. Interruptions to high voltage servicemains owned by customers is included.

  8. Extreme climatic conditions and natural disasters introduces a small level of inaccuracy to the data.

  9. Lines include both overhead lines and underground cable whether owned or leased by the company or owned by the customer.



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