The work we provide through our Technical Services Division is key to what makes O'Connell Electric a full service electrical contractor. We provide testing, commissioning, and preventative maintenance services critical to safe, reliable electrical systems operation—for businesses, at substations, and on power lines—as well as electrical engineering design and support services.

Additionally, as a Doble Engineering client, O'Connell has access to the industry's most sophisticated diagnostic test equipment as well as 25 million test results on over 100,000 types of apparatus. As a member of TEGG, our technicians and management teams are guaranteed to be current with the latest training, procedures, and equipment, allowing us to maintain the highest level of electrical systems reliability, performance, and maintenance.

The projects we work on are as diverse as the services we offer. For Steel Winds wind farm, what began as a small condition assessment project on a retired substation grew to full electrical construction at the site. O'Connell's diagnostic results along with substation design modification recommendations convinced developers we were right for the job. On a large power generation decommissioning project, O'Connell was contracted to perform testing and commissioning at eleven active substations while maintaining power. We also performed acceptance testing across 53 circuit miles of underground 115KV cable for the project.

With O'Connell, you'll never be left in the dark. Our 24-hour emergency response team is at the ready 7 days a week.

    Select below to reveal O’Connell’s project profiles for this market:


Technical Services


Arc Flash Hazard Analysis Services

  • Site Evaluation & Custom Programs
  • Electrical Equipment Condition Assessment
  • Unification Programs for Companies with Multiple Facility Locations
  • Arc Flash Analysis Utilizing SKM Power Systems Software
  • Facility Mitigation Recommendations
  • NFPA 70E Compliance
    —Field Data Collection Procedures
    —Energized Work Procedure Creation
  • All Studies Reviewed by State Licensed Engineers


Engineering Services

  • Design/Build & CAD Services
  • Short Circuit Coordination Studies
  • Power Coordination Studies
  • Protective Relay Settings Review
  • Protective Relay Upgrades
  • Power Quality Studies & Troubleshooting
  • Electrical Efficiency & Load Studies
  • Substation Modification & Upgrade Recommendations
  • Power Factor Correction
  • Systems Commissioning
  • Soil Resistivity Testing & Ground Grid Design
  • Surge Suppression Design & Replacement

Cable Testing & Fault Locating Services

  • Non Destructive Cable Testing
  • Time Domain Reflectometer Service (TDR)
  • Very Low Frequency Testing (VLF)
  • Cable Polarization Index Calculations
  • High Potential Testing
    —Up To 550,000 Volts
  • Magnetic Impulse Fault Detection
    —Up To 3700 Joules
  • Underground Cable Locating
    —Onsite Emergency Fault Repairs
  • Acoustical Fault Detection
  • Partial Discharge & Ultrasonic Testing
  • Splicing & Terminations
  • Thermographic Testing of
    Splices & Terminations
  • Medium & High Voltage Cable:
    —Inspection & Commissioning
    —Doble Insulation Power Factor
       Testing (M4000)
  • 24/7/365 Emergency Response
    —Call 800 343-2176

Predictive Preventative Electrical Maintenance Services

  • *Custom Maintenance Programs*
  • TEGG Service Provider
  • Equipment Life Extension Programs
  • Ultrasonic & Thermographic (Infrared) Inspections
  • Megger Testing
  • Power Quality Analysis
  • System Load Studies
  • Harmonic Distortion Analysis
  • De-energized Equipment Maintenance
  • Energized Equipment Maintenance
  • Voltage Regulator Service & Testing
  • Soil Resistivity Testing & Ground Grid Design
  • Surge Suppression Design & Installation
  • Non Destructive Cable Testing
  • Oil Sampling & Lab Analysis (DGA)
    —On All Dielectric Fluid Hardware
  • Oil Filtration & Vacuum Filling
  • Transformers:
    —Internal Inspections
    —Field Repairs
    —Turns Ratio Testing
    —Winding Resistance Testing
    —Load Tap Changer Service
       & Testing
  • Doble:
    —Dielectric Power Factor
    —Sweep Frequency Response
  • Maintenance & Testing of:
    —Oil-filled Circuit Breakers
    —Vacuum Circuit Breakers
    —Battery Systems
    —Network Protectors
    —Gas, Steam & Hydro Turbines
    —Surge Suppression
  • SF6 (Sulfur Hexafluoride):
    —Circuit Breaker Maintenance
       & Testing
    —Gas Reclamation & Leak
  • Circuit Breakers:
    —Timing & Travel-motion Analysis
    —Primary Injection Testing
    —Secondary Injection Testing
    —Voltage & Current Ratings
    —Microprocessor Controlled
       Trip-unit Retrofits
    —Mobile Test Equipment for Onsite
  • Protective Relays:
    —Testing & Calibration
    —Replacement & Refrofits
  • 24/7/365 Emergency Response
    —Call 800 343-2176


Acceptance Testing & Commissioning Services

  • Testing & Commissioning Activities Supervised by Onsite Field Engineers
  • Turnkey Systems Commissioning
  • Substation Acceptance Testing & Commissioning
  • Substation Equipment Condition Assessment
  • Transformer Assembly, Internal Inspections & Commissioning
  • Dielectric Fluid Sampling & Lab Analysis
  • Complete Protection Circuit Verification & Functional Testing
  • Current & Potential Transformer Acceptance Testing & Commisioning
  • SF6 (Sulfur Hexafluoride)
    Circuit Breaker Filling & Testing
  • Dew Point & Moisture Content Analysis
  • Vacuum Bottle Testing
  • Doble
    Sweep Frequency Response Analysis
  • Protective Relay Programming & Acceptance Testing
    —All Manufacturers
  • Commissioning Protection Scheme Verification & Drawing Reviews
    —Red/Green/Yellow Mark-ups
  • Soil Resistivity Testing
  • Ground Grid Inspection & Testing
  • Electrode Inspection & Testing
  • Surge Suppression Inspection & Testing
  • Medium & High Voltage Cable:
    —Doble Insulation Power Factor
       Testing (M4000)
    —Inspection & Acceptance Testing
    —Splice & Termination Testing
  • Low Voltage Cable Acceptance Testing
  • Thermographic & Ultrasonic Inspections
  • Functional Testing of All Circuit Breakers Including Primary & Secondary Injection Testing
  • Battery Systems Acceptance Testing & Commissioning
  • Network Protector Acceptance Testing & Commissioning
  • Systems Troubleshooting & Debugging


Protective Relay Calibration & Testing Services

  • Relay Calibration, Testing,
    Repair, Retrofits, & Upgrades
    —All Manufacturers
  • Turnkey Solutions: Design to
    Programing to Full Functional Testing
  • System Start-up, Support &
  • Doble F6150 3-Phase Power Simulator Relay Testing
  • End-to-End GPS Satellite Testing
  • Acceptance Testing for
    Point of Interconnect (POI)
    —Utility Witness Testing
  • Current & Potential Transformer Testing
  • Protection Scheme Varification
  • Sequential Event Recording &
    Post Fault Analysis
  • 24/7/365 Emergency Response
    —Call 800 343-2176