Serving the Power Industry for over 25 years.
Our Services
Substation Testing & Maintenance
Transformer Field Services
Commissioning Services
Infrared Thermography Scanning
Recloser Maintenance
Voltage Regulator Maintenance
Circuit Breaker Maintenance
Fabrication Services
Protective Relaying Services
Power Quality/Disturbance Analysis
About Us
Facility and Equipment
Employment Opportunities
Contact Us
Our Facilities...

ETMI has a 16,000 sq. ft. office shop complex located North of Rapid City, SD in Black Hawk. Our facility is equipped with (2) overhead bridge cranes and fabrication area. We are equipped with a bake-out oven, and a high voltage bay to simulate substation voltages from 2400v to 24,940v. We have 6000 gallons on new transformer fluid in stock along with totes of FR3 fluid.

Since we are a Cooper power Authorized repair facility we stock over $350,000 of recloser repair parts, and $100,000 of voltage regulator parts for all makes and models.
Electro-Test and Maintenance, Inc – home Doble Equipment Sales Agent Cooper Power Systems Authorized Service Center