ProGrid: The smart fuse switch disconnector for the energy transition

Based on Mersen's classic NH fuse switch-disconnectors and developed in collaboration with major European grid operators, ProGrid is a modular NH fuse switch disconnector that not only ensures reliable short-circuit and overcurrent protection but also can integrate power monitoring features. Its patented switching mechanism enables seamless integration and enhances both speed and safety, helping to optimize overall system architecture. Mersen is also the only supplier offering both NH fuses and fuse switch disconnectors – ensuring full compatibility and peace of mind.

Scalable Intelligence 

From basic protection to full grid intelligence, ProGrid is a versatile solution offering a future-proof path to network digitalization. ProGrid comes in three modular versions:

• ProGrid: standard protection for secondary substations and LV switchgear

• ProGrid Smart: Thanks to ProGrid’s embedded sensors for real-time monitoring of energy flows, transformer health and environmental data, ProGrid Smart meets the evolving needs of modern PV installations. It can record energy flows and measures key parameters such as transformer status, environmental conditions, and cabinet access — making it a smart, connected solution for today’s evolving energy systems.

• ProGrid SmartStation: Combines the Smart disconnector with additional sensors and monitoring devices for full supervision of transformer stations. In addition to energy monitoring, it allows tracking additional parameters such as temperature, humidity, opening.