THE power supply to almost 2500 Ergon Energy customers on the Southern Downs was interrupted on Monday night due to a fallen power line just east of Warwick.
One span of the 33kV line between the Warwick bulk supply point and the Allora substation fell at 6.08pm, interrupting power to about 1950 customers supplied from that substation.
The fallen line came into contact with an 11kV feeder line underneath it, resulting in about 550 further customers being impacted about 10 minutes later.
The fault current created by the lines clashing caused a loud bang from the nearby transformer, but it did not sustain any damage and the 11kv line remained intact.
Power to all customers supplied from the Allora substation was reinstated after about two hours when it was re-energised from Clifton rather than Warwick.
Power had to remain off to customers on the Ogilvie Road feeder for a further 75 minutes so crews could safely repair the 33kV line.
After crews completed their repairs to the 33kV line, the network was restored to its normal configuration shortly after 10pm.
Crews could not identify a specific cause for the fallen power line, but a bird strike that caused the 33kV lines to clash was a possible cause.
