TESTING & MAINTENANCE CAPABILITIES

Hood - Patterson & Dewar, Inc. is a full service electrical and mechanical testing firm with in-house capabilities to perform all electrical testing required of the most comprehensive testing programs. Testing and maintenance service clients include a wide range of owners, engineers, mechanical contractors, electrical contractors as well as along list of communications and electrical utilities. Our testing capabilities include high and low voltage cable testing, ground fault system testing, ground impedance and resistivity testing, insulation power factor testing, transformer testing, protective relay testing, vacuum switches and breakers, molded case and air circuit breaker, UPS system testing, battery/charger testing, insulating materials testing and complete infrared surveys.

"We have been very pleased with the services provided by Hood Patterson & Dewar. We have confidence in their expertise and knowledge, and we feel that their close attention to detail has raised the quality of our data center facility operations. We can confidently recommend them for their knowledge and expertise with energy delivery systems design and operations." Charles Hunn, President
Star Electrical Contractors

We routinely provide maintenance testing and re-commissioning of electrical and mechanical systems for many owners and operators of mission critical facilities, universities, industries and high-rise buildings across the United States. Before performing the tests, we assist our customers in developing and approving detailed MOPs and procedures to safely configure, test, and re-configure their systems. Then we provide complete documentation of the test results and submit recommendations for system improvements, when warranted.

Hood-Patterson & Dewar takes a hands-on approach with each assignment, investigating every functional parameter, delivering a well-defined commissioning plan and managing the on-site process. HPD can leverage knowledge gained through failure-mode analysis and integrated system commissioning to perform diagnostic investigations and resolve problems related to power, grounding and reliability.

We serve our clients as a truly independent and objective commissioning agent. We will assure that all components and systems are certified to perform as desired and as designed.

  • High & Low Voltage Cable Testing
  • Ground Fault System Testing
  • Ground Impedance Testing
  • Ground Resistivity Testing
  • Insulation Power Factor Testing
  • Transformer Testing
  • DC High Potential Testing
  • Vacuum Switches, Breakers, and Contactors
  • Oil Circuit Breakers
  • Contact Resistance Testing
  • Infrared Surveys
  • Motors and Generators (Electrical)
  • Protective Relays: Calibration
  • Substation Apparatus Testing
  • Switchboard Instrument Testing
  • Molded Case and Air Circuit Breakers
  • Primary/Secondary Current Injection Testing
  • Current and Potential Transformer Testing
  • Electrical System Troubleshooting
  • UPS System Testing
  • Battery/Charger Testing
  • Hospital Testing