Monday's power outage was the fourth major outage to hit Southern Lewisville this year. We asked Lewisville's local electric transmission and distribution provider, Texas New Mexico Power Co. (TNMP) if they incidents had some common thread, or if it was coincidental. Today, they got back to us with this response:
Monday's outage in Lewisville was due to failure of a large piece of equipment in a substation. When that failure happened, system-protection functionality recognized the resulting fault and "tripped off" customers' service, which it's designed to do to protect the system from further damage. The original equipment failure is under investigation by our staff.
TNMP has experienced three other large outages this year in this area. All were unrelated, but we recognize that they were disruptive to our customers. One was the result of a system fault, the second was due to equipment failure and the third was due to protection equipment tripping off (similar to Monday's outage, but in a different location).
TNMP responds quickly to these incidents. To ensure both public and employee safety, however, these sometimes can take longer to restore than we all would like.
We appreciate the concern Lewisville customers have about these outages. Lewisville is home of TNMP's main office and we're proud of our long history serving the community. We take very seriously our responsibility to the citizens of Lewisville and we're working hard to prevent a recurrence of these issues.
In the event of a power outage, you can visit TNMP's outage website on your smart phone, or call 888-866-7456. Hopefully we are done with these outages for the time being.