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Electrical Maintenance, Repair & Testing Services

Preventive Maintenance That Protects Your Power

As an AVO-certified service provider, we deliver reliable Electrical Preventive Maintenance and Testing (PMT) programs to help you:

  • Avoid unexpected outages
  • Comply with NFPA 70B, ISNnetworld and NICET standards
  • Extend the life of critical electrical equipment
  • Improve safety and operational uptime

All services are performed by certified technicians using calibrated instruments and industry-leading testing practices for both low and medium-voltage systems.


Our Core Services

Visual & Mechanical Inspections

Detect signs of wear, thermal damage, corrosion, and mechanical failure before they become major problems.

Infrared Thermographic Scanning

Use thermal imaging to pinpoint hot spots and overheating components without system shutdown.

Insulation Resistance Testing (IR)

Evaluate the integrity of cable and winding insulation to prevent breakdowns and electrical faults.

Circuit Breaker Testing & Maintenance

Ensure circuit breakers operate correctly with contact resistance testing, injection testing, lubrication, and adjustment.

Transformer Testing

Power factor, turns ratio, insulation testing, and oil analysis to verify transformer performance and health.

Protective Relay Testing

Confirm reliable fault protection through secondary injection testing and calibration.

Grounding System Testing

Measure soil resistivity and ground resistance to verify proper grounding system and personnel safety.

Power Quality & Harmonic Analysis

Analyze sags, swells, transients, and harmonic distortion that can affect sensitive equipment.


What You Get


✓

Expert analysis of all electrical assets

✓

Data-rich, easy-to-read maintenance reports

✓

Prioritized recommendations for repairs or upgrades

✓

Peace of mind with compliance-ready documentation


Flexible Scheduling

Our team can perform services during planned outages, off-hours, or weekends to minimize disruption and maintain your operations.


Who We Serve

We support electrical systems across multiple industries, including:

  • Manufacturing & Industrial Facilities
  • Data Centers & IT Infrastructure
  • Hospitals & Healthcare Facilities
  • Commercial Buildings
  • Utilities & Municipalities
  • Educational Campuses

Stay Compliant. Stay Operational. Stay Safe.

Preventive maintenance is more than a checklist—it’s your first line of defense against electrical failure. Let’s make sure your systems are ready.

Schedule Your Maintenance Today
Email: info@gss.us.com | Phone: (410-584-7670)

Testimonials

“I want to thank your crew for their expert work on Saturday. They overcame a couple of obstacles, which helped ensure normal power was restored. They also operated the emergency generator for me, as I have no idea how to do so!
They are clearly experts in their field, and also very hard working and dedicated professionals.”
- Thomas C. Buckley, RPA Vice President of DTZ/Cassidy Turley

Another great experience working with you guys. Thank you very much.
– Jim Wilson, Owner – PQ Sales

Wanted to express thanks to you both and your crew for ensuring we received the necessary parts and getting the work completed before our mandatory testing exercise this week. Job well done.
Thanks,
- Jeffrey Stewart, Plant Manager
Constellation – An Exelon Company

I haven’t had a chance to get back to you and let you know that the technicians that performed the IR scan for us were awesome, very polite and professional, I am blessed to be able to do business with GSS. Have a great day.
– Ron Dellinger, Maintenance Manager
Beynon Sports

“I want to thank your crew for their expert work on Saturday. They overcame a couple of obstacles, which helped ensure normal power was restored. They also operated the emergency generator for me, as I have no idea how to do so!

They are clearly experts in their field, and also very hard working and dedicated professionals.”
- Thomas C. Buckley, RPA Vice President of DTZ/Cassidy Turley

 

Testing


Global Substation Services, Inc. has provided 35 years of quality testing services with our team of trained and certified technicians and professional engineers, and is performed in accordance with industry and manufactures standards, NETA, IEEA, and NEC.


More info

 

Testing Services

  • NETA testing performed by NICET certified technicians