GPA: Major Work Underway at Umatac Substation


Guam – An overhaul of the Umatac Substation is underway involving maintenance and upgrades to critical equipment and machinery to improve reliability and power quality to residents and businesses from Umatac, Malesso towards Bear Rock in Inarajan.

The work is expected to take approximately 30 days with work crews from Substation, Relay and SCADA (Single Channel and Data Acquisition) personnel.

“The scope work involves maintenance on the main transformer, changing out gauges and cooling radiators and purifying lubricating oil – work on this level will cost about $50K,” stated Chris Balajadia, Substation Supervisor, “Relay crews will focus on upgrades to the protection systems and SCADA will work to improve line communications for monitoring the operability of the substation – all of which will improve power quality to our Southern

Use of the Authority’s mobile substation will handle the power load to southern circuits on the western side of the island so that power outages are not necessary to complete the work.

“This work is part of our plan to complete major overhaul & maintenance projects during this fiscal year,” remarked Balajadia, “That plan includes doing work at Hagatna, Apra and Talafofo substations to improve service to those areas – customers should notice an improvement in their reliability and power quality