Substation, Industrial Testing and Analysis Equipment
Doble Engineering Co.
Manufactures of specialized testing equipment including Digital Relay Power System Simulators, Digital Circuit Breaker Analyzers, Insite On Line Diagnostic System and a Family of Moisture in Oil Sensors.

Represented in Ohio, Kentucky and the Southern half of West Virginia


M5100
Sweep Frequency Response Analyzer New and Improved Method for FRA Testing.

TDR9000
Lightweight, single-box, and field-portable circuit breaker test instrument tests all types of breakers.

F2253
The F2250 Family of Power System Simulators is the ideal tool for scheme diagnostics. High power capability of uo to 675 VA, 180 A-rms per phase, combined with the G.P.S. satellite synchronizing option makes them perfect for performing end-to-end simulations of transient conditions. This eliminates the need for costly and time consuming staged fault testing.





F6150
Improve system reliability and eliminate the need for costly and time consuming staged fault testing using Doble's F-Series of Power System Simulators along with ProTesT automated relay testing software.



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