IDEF SYSTEMES® supplies protection relay solutions to the electrical transformer industry. Our flagship product, the DMCR® – Detection, Measurement and Control Relay, designed and manufactured in accordance with Standard IEC 60076-22-1 / EN 50216-3, continuously monitors pressure and temperature levels as well as gassing or dielectric level decrease within the tanks of oil-filled distribution transformers. We are an innovative and quality-focused company and have become a trusted partner to the transformer industry across the world. IDEF SYSTEMES® is certified ISO 9001:2015 by Bureau Veritas.

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IDEF SYSTEMES® is exclusively focused on offering protection relays to the transformer industry across the world. We are an independant company founded in 1994 and our manufacturing facility is located in the French Alps.


IDEF SYSTEMES® is the designer and sole manufacturer of the DMCR®, a patented transformer safety solution which has become the reference relay to the electrical transformer industry.


For the last 20 years IDEF SYSTEMES® has supplied over 200,000 protection relays across the world. We thrive to offer total quality and reliability in our products and services in all circumstances.


Our customer list includes the world’s largest and most demanding transformer OEMs, project managers, electric utilities and maintenance specialists. We supply our products on the five continents.