Over 3,300 customers are currently without electricity in the Ballymena area.
The Times understands a total of 3,367 customers are without power in the region.
The outage occurred at approximately 12pm today.
The estimated restoration time is 3:15pm on Wednesday, March 22.
A Northern Ireland Electricity Networks (NIEN) spokesperson said: “A repair team has been assigned and will be on its way as soon as possible.”