The Next Best-Practice in Reliability

Case Studies

Exacter Case Studies

Unitil logo
Unitil Corporation, NH-MA-ME

Unitil saw that outages caused by equipment failure presented the best opportunity to improve overall system reliability. They began a program targeting all of their 3 phase circuits in 2012 that is continuing through 2017. Reduction in SAIDI and CMI far exceeded Exacter's estimate of 10%. Power Outages have decreased. Outages occurring at any of the problem locations could have resulted in over 1 million CMI each year. The results were so interesting that a full article was written and is featured in the October 2015 issue of T&D World Magazine.  Read More   


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National Grid, NY
National Grid Division, Long Island Power Authority (LIPA), conducted a two-year pilot program to examine the effectiveness and accuracy of the patented Exacter technology and overhead system assessment. At the completion of the pilot program, National Grid selected a number of components that were identified by Exacter as exhibiting failure signatures to be independently tested by EPRI for degradation and/or contamination. The results of the pilot program and independent EPRI study confirmed the effectiveness of the patented Exacter technology.  Read More


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Wabash Valley Power Association, IN-IL-MO
For more than 7 years, Wabash Valley Power has had a secret weapon helping them continuously improve their reliability. It’s a unique technology that enables them to find and repair invisible overhead line equipment problems before they cause a power outage. The secret weapon is called EXACTER® Predictive Technology.  Read More


Jackson Center logo
Village of Jackson Center, OH  

Jackson Center did their first Exacter reliability survey in the spring of 2015.  Exacter uncovered 22 insulators and two lightning arresters.  The two Exacter surveys prevented significant problems that could have impacted the community's largest industrial customers "We let our customers know that we patrol the lines with Exacter to assure reliable power.  It's literally the best tool in our reliability tool box."   Read More            


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COSERV Electric, Denton, TX

Coserve Electric serves over 152,000 member/owners in North Texas.  Amidst major electrical storms, Exacter was called in to perform health assessments in several key parts of the service area.  “Exacter’s predictive data provided unique insight into the overall health of our system.  It told us where specific weak points are located, which enabled us to stay ahead of future power outages and make our grid more resilient to the weather challenges that are inherent to this part of Texas."  Read More


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Pedernales Electric, Johnson City, TX

Exacter's strategic partner, Davey Tree, performed an integrated reliability assessment that inculded IR, visual and Exacter technology.   In the year since the problematic locations were identified and repairs were made Pedernales Electric Company has seen a CMI reduction of 22% on outages related to overhead equipment across the entire distribution system.  Read More


Orrville Logo
City of Orrville, OH

In June of 2016, Exacter performed a health assessment of 100 miles of Orrville’s three-phase lines. Twenty-one locations were discovered where conditions were present that could lead to an outage. “The results were very interesting. I was glad Exacter found no problems on the lines leading-to-and-around the industrial park, but I was surprised at some of the finds. There was arcing equipment on streets we drive by everyday, but were showing no visible signs of deterioration."  Read More


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The City of Westerville, OH – 80% System Outage Prevented - During a routine PdM inspection survey with Exacter technology, a failure signature was identified as coming from a major feed riser-pole. Upon close examination of the top of the structure it was noticed that the sub-transmission cable ground leads had been blown off the terminations. There were also burned cables going underground. This was an imminent failure that would have taken out 80% of the city’s system and would have resulted in a significant rebuild. The repair was made before any problem ocurred. Read More

town of Princeton logo

Town of Princeton, KY – Exacter found 17 at risk components that were arcing on the overhead distribution system. Most of the components were insulators or dead-end bells. The Princeton maintenance teams put them into their work order system and all of the locations were investigated and quickly repaired during regular work hours. The most significant discovery from Exacter was an arcing current transformer (CT) inside one of the substations. Had it continued to deteriorate, it potentially could have caused an outage taking down half of the city and would have possibly resulted in costly damage to other components and systems inside the substation. Read More


Midwest utility
Municipal Utility Receives 300% ROI on Exacter Project - A Midwest utility used Exacter to receive an overall grid health assessment. “We overlaid the Exacter locations with our GIS circuit data and determined that outagesat these locations would have cost the city over $135,000 over the next three to five years. We received more than 300% ROI on the project, which did not even include the intangible societal benefits related to schools or hospitals not being out of power,” said the utility supervisor. In addition, the city was able to minimize the safety issues associated with 26 emergency repairs being performed at night or in the winter. Read More


 Rural co-op
Rural Cooperative Reduces SAIDI by 4.5 Minutes - In a region prone to storms and lightning strikes, this southern utility used Exacter as part of a new reliability initiative. Stage one included a grid health assessment that over two years found 56 deteriorating compo- nents on their system. After visiting each site and confirming Exacter’s accuracy the utility replace the at-risk components. After two years the Utility reduced its SAIDI by 4.5 minutes. In addition, equipment-related power outages went down by 21%.  Read More