Smart fuse/switch prepares power grids for the energy transition

Electrical systems specialist Mersen has developed a modular smart fuse/switch disconnector for distributed power grids.

The ProGrid NH fuse-switch disconnector has been specially designed for use in grid and transformer stations, cable distribution cabinets and low-voltage distribution boards to protect local low-voltage networks from overcurrent and also record the energy flows and measures other parameters.

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The modular ProGrid offer is available in three versions: Mersen ProGrid, Mersen ProGrid Smart and Mersen ProGrid SmartStation.

The ProGrid is a standalone fuse switch-disconnectors to protect substations, transformer stations or switchgear in buildings against overcurrent and short circuits. This version has a newly developed patented switching mechanism and can be upgraded with a smart module for monitoring if required.

ProGrid Smart adds an energy monitoring module and sensors for the measurement of the energy flow at the low-voltage outgoing circuits of the switchgear, transformer station or substation.

The third variant, ProGrid SmartStation, records the energy flow in low-voltage grids in real time. This can be combined with other modular measuring devices and sensors so that grid operators can create a complete intelligent monitoring system for their medium/low-voltage transformer stations. The intelligent fuse switch-disconnectors are available in two versions: the smart module is located either on the top or bottom of the device. The top version is ideal for installation in new switchboards or transformer stations/substations.

The patented mechanism simplifies maintenance with a single twist to access the fuse. The ProGrid can also be easily and safely mounted on live busbars using suitable tools or attached to unbolted busbars using hook terminals, even with current transformers.

Mersen has worked closely with leading grid operators in the development of ProGrid to adapt distribution grids, giving flexibility and efficiently balancing new, growing loads and power sources such as PV panels, EV charging stations and heat pumps.