The official version of this document can be found via the PDF button.
The below content has been automatically generated from the original PDF and some formatting may have been lost, therefore it should not be relied upon to extract citations or propose amendments.
1240/5(6958)
WRITTEN QUESTION TO THE MINISTER FOR TREASURY AND RESOURCES BY CONNÉTABLE OF ST JOHN
ANSWER TO BE TABLED ON TUESDAY 26th JUNE 2012
Question
Would the Minister,as the representative of the shareholder, provide a detailed breakdown of the numbers of power cuts which have occurred in the Island over the last 10 years, indicating the dates and whether they affected the whole Island, specific Parishes, districts or areas; the duration of each power cut, and the cause of each one?
Answer
Jersey Electricity, as a plc listed on London Stock Exchange, reports on security of supply performance in an audited Annual Report each year. The simplest, and main industry recognised, method of comparing electricity supply reliability is by monitoring Customer Minutes Lost (CML's). This measures the average number of minutes in each year that a customer's supply has been interrupted and is seen as the most meaningful Industry measure. The table below shows the comparative performance of Jersey Electricity over the last 10 years, against the UK and similar island jurisdictions. As can be seen, the performance in Jersey is favourable compared to other regions and supply security is, on average, among the best in Europe.
CML's 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 | Average |
Jersey Electricity 10 27 12 11 39 58 5 9 10 45 Gurnsey Electricity 34 68 53 15 12 34 37 19 23 10 Manx Electricity 29 87 87 21 21 21 17 10 24 12 UK | 23 31 33 80 |
In response to the Connétable 's question, information on the number of systems faults is also monitored by JEC. However this is not held at the level of detail asked for. A summary of the System faults over the last 10 years are as follows:-
System Faults (Jersey) | |||||||||
Financial Year | 02/03 | 03/04 | 04/05 | 05/06 | 06/07 | 07/08 | 08/09 | 09/10 | 10/11 |
High Voltage | 14 | 5 | 8 | 8 | 12 | 2 | 5 | 2 | 6 |
Low Voltage | 121 | 114 | 89 | 91 | 90 | 74 | 70 | 77 | 81 |
Totals | 135 | 119 | 97 | 99 | 102 | 76 | 75 | 79 | 87 |
The following table shows that a fair proportion are outside of JEC's control, caused by third party damage faults (e.g. a developer cutting through a power line).
Third Party Damage Faults ( Jersey) | |||||||||
Financial Year | 02/03 | 03/04 | 04/05 | 05/06 | 06/07 | 07/08 | 08/09 | 09/10 | 10/11 |
High Voltage | 5 | 3 | 3 | 2 | 3 | 0 | 1 | 0 | 1 |
Low Voltage | 27 | 34 | 31 | 41 | 35 | 25 | 27 | 28 | 26 |
Totals | 32 | 37 | 34 | 43 | 38 | 25 | 28 | 28 | 27 |
It is not possible to provide a breakdown by Parish, District or area.