More than 1600 premises were left without electricity on Sunday afternoon because of a high voltage cable fault in Kings Meadows.
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TasNetworks' head of operations Jason King said the outage - which saw some premises lose power for five hours - ensured the safety of customers was protected.
"The outage was caused by a high voltage cable fault up the pole," he said.
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"To protect customers, automatic safety devices at our substation immediately cut the power.
"Our crews found and isolated the faulty cable. They progressively repaired the overhead lines, restoring power as they went."
Mr King said power lines could occasionally spark "for a number of reasons".
"It's pleasing that our safety systems worked as they should, and triggered immediately to protect customers," he said.
"People should always stay at least 10 metres from sparking or damaged power lines."
Anyone who sees sparking or damaged power lines should report them to TasNetworks immediately by calling 132 004, Mr King said.