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Manassas city officials are hoping a second-hand transformer will fix its electrical woes 鈥� at least for now.
A used transformer was shipped to the city on loan last week and installed Monday at the Battery Heights substation, the source of several widespread outages that have left thousands in the dark for hours in recent months.
The new transformer will temporarily replace the substation鈥檚 old one, which was facing several issues even before it was twice struck by lightning earlier in the summer. In the last two weeks, some city residents have lost power on two separate occasions 鈥� most recently on July 28 and days earlier on July 24, when over 1,500 customers lost power for several hours.
But even before the lightning strikes that brought the latest spate of outages, the city鈥檚 electrical system was facing 鈥渦nprecedented鈥� outages related to failing parts at Battery Heights, according to Manassas Utilities Director Tony Dawood. Residents have faced significant outages in February, April, June and July.
鈥淭hese outages, for the city, are unprecedented,鈥� Dawood said in June. 鈥淲e鈥檙e doing everything we can, as quickly as possible, to make the station whole again.鈥�
The city operates its own electric distribution network, purchasing power on the PJM energy market through NOVEC. But typically reliable service 鈥� a point of pride for the city-owned utility 鈥� has become a mounting problem at Battery Heights, one of four residential-focused substations.
Numbers are not yet available for July, but in June the average power customer in Manassas lost power for more than 26 minutes. In June of 2022, the average customer was without power for just over 4 minutes.
City Manager Pat Pate told InsideNoVa that prior to the lightning strikes, some of the substation鈥檚 insulation was failing and allowing water to damage several components.
鈥淭hat [insulation] issue has been fixed, but as a part of what we鈥檙e doing on the Battery Heights substation, they鈥檙e going to do a complete soup-to-nuts review of that station, and we鈥檙e going to basically upgrade everything in the station that could possibly need upgrading to prevent that from happening again,鈥� Pate said.
The substation and many of its components are over 30 years old.
As the problems compounded, officials tried to bypass certain components at the substation, but that only added stress to other parts of the network as temperatures rose in June and July, resulting in low-level light flickering or full-blown outages like the one on July 24.
鈥淭here was a little bit of a prolonged outage there for certain people longer than we typically would have, and that was related to the additional loads we put on those lines. And our system is pretty much underground, which makes it very reliable, and you don鈥檛 have storm issues, but in this case, when you have cables that fail, it鈥檚 harder to find those cables because they鈥檙e underground,鈥� Pate said.
The rental substation installed on Monday comes from Pennsylvania on a three-month loan. It will cost the city roughly $400,000 all told, but it won鈥檛 be a permanent solution. While it鈥檚 expected to keep things up and running for the time being, the city鈥檚 utility department is hoping to fix the transformer that was struck by lightning.
The lead time for a new transformer, Dawood said, is about two years. So for now, the city is hoping to breathe new life into what it already has.
鈥淲hat鈥檚 very unique to electrical equipment is it doesn鈥檛 fail like you would think, instantly,鈥� Dawood said. 鈥淚t鈥檚 a cumulative process, so it takes time. You can test this piece of equipment and it鈥檒l show that it鈥檚 working when, in fact, it鈥檚 already been deteriorating. And then it鈥檒l completely fail.鈥�
