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11 October 2004 - Transpower, the New Zealand grid owner and operator, faces more problems with its inter-island electrical link after detecting a fault in the Cook Strait.
A fault was found in one of its three high voltage direct current (HVDC) cables on the sea floor, connecting the North Island to the South Island.
The suspect cable has been taken out of service, reducing the capacity of the link from 1040 MW to 886 MW, but Transpower have said that this is highly unlikely to cause any power shortages.
"We've had preliminary discussions with generators and they don't see it as causing a major problem," said spokesman Chris Roberts.
Electrical pulses have been sent down the cable, and the fault has been isolated several hundred metres offshore of the cable's North Island terminus at Oteranga Bay. Repairs are likely to take six months and cost millions to fix.
Transpower is still trying to fix an electronics problem in the control system for the link at Benmore.
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