New Zealand Gazette – 1997 – No. 114

Page 2675

✨ Electricity Reliability Statistics

2 SEPTEMBER
NEW ZEALAND GAZETTE
2675

The CAIDI for the total number of interruptions within each interruption class:

Network or Generation Owner	Classification	Minutes per Customer Interruption 1997	1996	1995
MainPower	Planned Shut-Down (Class B)	112.86	243.08	111.94
	Unplanned Interruption (Class C)	51.71	113.27	64.00
Trans Power	Planned Shut-Down (Class A)	318.00	179.63	12.00
	Unplanned Interruption (Class D)	57.77	-	63.64
Generation ECNZ	Unplanned Interruption (Class E)	-	-	-
Generation Other	Unplanned Interruption (Class F)	-	-	-
Other	Other Interruptions (Class G)	-	-	57.87
	Unplanned Interruption (Class G)	-	-	-

RULES FOR DATA ASSEMBLY PURSUANT TO REGULATION 16

Only interruptions arising from incidents at voltages of 3.3kV or greater which cause a loss of supply to customers are included.
The operation of a high voltage fuse supplying a three phase transformer is included.
An interruption to a customer is a loss of supply to a metered installation within the customer’s premises.
The number of customers interrupted is determined by computer analysis of known customers at each distribution transformer affected.
Data is not subdivided into urban-rural density classification.
The interruption time is the time taken to restore supply to 100% of affected customers.
Interruptions to high voltage servicemains owned by customers is included.
Extreme climatic conditions and natural disasters introduces a small level of inaccuracy to the data.
Lines include both overhead lines and underground cable whether owned or leased by the company or owned by the customer.

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VUW Te Waharoa — NZ Gazette 1997, No 114

NZLII — NZ Gazette 1997, No 114

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✨ LLM interpretation of page content

🏭 Disclosure of Reliability Performance Measures and Statistics (continued from previous page)

Domain🏭 Trade, Customs & Industry
KeywordsReliability, Electricity Distribution, Performance Measures, Statistics, MainPower New Zealand Ltd

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