Complete Diagnostic Solutions – That’s the Doble Difference
Since 1920, Doble Engineering Company has pioneered dependable diagnostic solutions for electric power apparatus. From the beginning, Frank Doble recognized the value of collecting and archiving apparatus test results and sharing lessons learned and best practices within the industry.

Our unique business proposition combines three elements - diagnostic test instruments, expert consulting and testing services, and the world’s largest resource library of related knowledge - into complete solutions.

Making informed decisions is critical to ensure reliable electric power and prevent costly and dangerous failures. Since Doble does not manufacture or market utility apparatus such as generators, transformers and circuit breakers, our customers trust us to be an honest and objective source of information. Our team of experts is uniquely positioned to conduct a thorough and unbiased review of an assignment or situation. Appropriate actions can be selected from Doble’s wide array of available solutions.

Products
Extensive experience working on every continent, in all types of operating environments, has enabled Doble to develop the most technically advanced instrumentation for performing on-line and off-line diagnostic tests. Doble test results can be compared instantly to our ever growing on-line database of over 10 million test results on 350,000+ types of apparatus. That statistical significance gives customers the peace of mind they need when presenting critical recommendations to senior management.

Services
Working with Doble gives you access to the best engineers in the world. Our team can be contracted on an ongoing basis or for individual services as needed. We can supplement your team with everything from simple field testing services and analysis of test results to expert consultation on your toughest problems and largest investment purchases. Our Material Laboratories complement these services with testing of insulating materials and analysis by the finest chemical engineers in the industry.

Knowledge
Doble has an unwavering commitment to connect our clients with the knowledge they need to make critical energy decisions. We were the first company in the electric power industry to create a forum for experts around the world to meet and share information. We continue to lead the industry in making vital connections that accelerate progress and serve the needs of our clients.

Doble Engineering Company Downloads

Doble - TDR9100 - Circuit Breaker Diagnostics Brochure