Orion is still looking into what caused power cuts to 30,000
in north Christchurch overnight.
The outage initially affected 30,000 customers, although
power was quickly restored to 12,000 homes and power was
restored to all within three and a half hours.
Orion chief executive Rob Jamieson said the fault occurred on
a high voltage line which runs for 9km from Islington to
"Last night, and again at first light this morning, our crews
walked the line to try to find the fault and we have found no
They were continuing to investigate what caused the rare type
of outage, he said.
Mr Jamieson said the fault, as a result of a storm, was a
reminder to people that power failures occurred at any time
so it was important to be prepared.
"Everyone needs a back-up plan, which includes having
torches, with spare batteries, and a wind up radio. Simple
preparations can make a big difference."