Mersen ProGrid

ProGrid is Mersen's next-generation smart fuse monitoring solution designed to protect, monitor, and digitalize low-voltage electrical networks. Combining electrical protection, real-time monitoring, and operational data collection within a single platform, ProGrid helps utilities and infrastructure operators improve network visibility, maintenance efficiency, and grid reliability.

Based on intelligent NH fuse switch disconnectors, ProGrid continuously monitors fuse status, energy flows, and critical network parameters while enabling remote supervision of low-voltage assets. Developed for transformer substations, cable distribution cabinets, and low-voltage distribution boards, it supports the digitalization of electrical infrastructure and helps operators improve reliability, safety, and operational efficiency.

Key Benefits

• Real-time energy monitoring for continuous visibility of network conditions
• Grid digitalization through connected and intelligent protection assets
• Faster maintenance interventions enabled by immediate event detection and reporting
• Enhanced network reliability through improved monitoring and operational insight

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 Mersen ProGrid NH fuse switch disconnectors meet all the requirements of grid operators and industry for power distribution in grid and transformer stations, cable distribution cabinets, and low-voltage distribution boards. 
Mersen ProGrid solutions are a new generation of electrical protection devices designed to protect, monitor, detect and report events on the low-voltage grid. They are based on the NH fuse switch-disconnector and provide digitalization of the grid infrastructure.

Mersen ProGrid is a flexible and modular solution with 3 offers: 

• Mersen ProGrid, the stand-alone fuse switch disconnector to protect the substation from overcurrent and interrupt the electrical circuit’s flow ; 
• Mersen ProGrid Smart, the smart solution to monitor energy flow, that can be retrofitted from Standard to Smart, even on old installation ; 
• Mersen ProGrid SmartStation, the complete, intelligent solution to monitor, in addition, the entire environment (transformer temperature, humidity…) to provide full digitization of substations and distribution cabinets and ensure total control of the network.

ProGrid is an ideal solution to ensure the availability of the low voltage electrical network by protecting against overcurrent, while also offering an intelligent system to digitize the network.

Simple and ergonomic solution 

The basis of this innovative system is a traditional Mersen fuse switch disconnector (performing up to 800V AC and 910 A), which not only safeguards the substation from overcurrent and short-circuits but also offers fast installation and replacement thanks to a patented switching and opening mechanism. 

With this unique movement, the NH fuse blades are first released from the fuse contacts on both sides in parallel translation for better arc breaking performance, then in a rotational movement to allow the user easier access to the fuse for maintenance. The full motion is safer than other solutions as it ensures IP20 contact protection for the user during the full opening of the fuse operating covers. 

The cover handle can be easily removed from the base, allowing the NH fuse to be easily positioned for replacement. Parking positions for maintenance and padlocking facilities in the open, closed and parking positions make this fuse switch disconnector the safest and easiest to use on the market.

The most compact Smart NH Fuse-Switch-Disconnector on the market

The ProGrid fuse-switch-disconnector is also available as a smart fuse-gear: a pre-mounted Modbus RTU module is installed on the top or bottom of the new fuse-switch-disconnector. 

With no wiring required by the installer, the module provides direct access to live energy and condition data and is compatible with all Modbus RTU master devices and all sensor configurations (current transformers 1A, 5A, 333mV). 
In its lower version, the Mersen ProGrid fuse-switch-disconnector is the most compact smart solution on the market, with the same footprint as a regular NH fuse-switch-disconnector, making it perfect for retrofitting existing switchgear panels. 

Easy to insert and remove, the top version offers the easiest maintenance solution.

In addition to the pre-assembled ProGrid Smart complete solution, Mersen offers a simple solution for upgrading a stand-alone fuse-gear to a Smart fuse-gear with integrated sensors and wiring with no contact with the busbar system. 

Whatever the solution, up to 24 ProGrid switch-disconnectors with Smart Modbus RTU module can be daisy-chained via robust RJ45 connectors for power supply and communication.
 

ProGrid SmartStation

The third pillar of Mersen's new modular ProGrid system. This solution allows the combination of the new ProGrid Smart fuse-switch-disconnector with additional modular measuring devices and sensors to create a complete intelligent monitoring system for the medium/low voltage transformer substation.

The ProGrid SmartStation includes comprehensive sensors that monitor not only the energy flow of the station's low-voltage outputs, but also the complete status of your installation in the field, including environmental values, external station access and transformer status.

All devices are connected to the supervision level thanks to Modbus RTU or Modbus TCP/IP communication for an open and standard communication protocol. The distribution system operator can access all the data measured by the sensors via a direct web page access to each of the SmartStation devices as a light grid control system, thus identifying the need for preventive or curative maintenance.

During the development of ProGrid SmartStation, Mersen has worked closely with leading grid operators in Germany and other European countries to support them with their day-to-day challenges. As a result, ProGrid is ideally suited to enable smart low-voltage grid operators to efficiently adapt their distribution networks, gain flexibility and efficiently balance new and increasing loads and power sources such as PV panels, EV charging stations and heat pumps.