• • • SMART BUILDINGS & IOT • • •
are very useful, since real-time measurement of the energy flow allows efficient adaptation of the distribution networks. Mersen developed ProGrid in close cooperation with leading grid operators in Germany and other European countries. The development was pursued in agile mode with early user tests for the main functionalities and at each stage of the project. This immediate and direct feedback allowed the development team to integrate improvements early in the process. Valuable user experiences were taken into account to deliver this final product. As a result, the fuse switch disconnectors are optimally adapted to the requirements in the substation or in building automation switchgear. The degree to which Mersen tailored the ProGrid solutions to the requirements of power companies and electricians is already obvious in the patented switching/opening mechanism.
Opening mechanism
facilitates installation The mechanism executes two-step motions: parallel and rotating. The first parallel step is safer than other solutions, as it ensures IP20 protection against electric shock for the operator. IP20 protection lasts during the complete operation of the device, with no finger access to the electrical contacts. The second rotary motion allows easy access to the fuse. With a suitable tool, the fuse switch disconnectors can be mounted securely on current-carrying bus bars. They can also be installed on non-threaded bus bars using hook elements – even with current transformers.
Designed for easy retrofitting
on switchgear Mersen offers the ProGrid fuse switch disconnectors as a standalone version and as ProGrid Smart with factory-integrated sensors and smart module on the top or on the bottom of the device. The Top version is especially suitable for installation in new switch panels or transformer stations/substations. To retro-fit an existing cabinet, the Bottom smart solution is ideal, as it enables one-to-one replacement of the already installed standard fuse switch disconnectors with ProGrid Smart Bottom. This is currently the most compact smart version of a fuse switch disconnector on the market and the footprint of the device matches exactly the standard from the market, limiting the impact on existing installation. Up to 24 ProGrid smart modules can be connected per master in sequence through daisy-chaining. Mounting involves only minimal wiring: the sensors’ cables are inside the fuse switch disconnector and are not in contact with the bus bar system. With only 1 Modbus cable distributing the communication between the modules and the gateway, the ProGrid Smart module offers direct access to the real-time energy and status data. In addition, the design of the ProGrid fuse switch disconnectors enable the upgrade from standard to smart, thanks to pre-wired accessory kits and easy to install sensors cabling through the inside of the device.
Worldwide access to
all sensor data ProGrid Smart modules are compatible with all devices that communicate using the Modbus RTU and ProGrid SmartStation measuring modules can also communicate in Modbus TCP/IP and MQTT protocol. Grid operators can use these interfaces for real-time access via the internet to all data measured by the sensors in the switchgear and its environment (via light control system provided by Mersen or other partners).
The Modbus RTU cable in the Mersen ProGrid Smart is not only used for data transfer, but also supplies the modules with power. This eliminates cables and reduces installation space. With high compatibility to any Modbus RTU or
TCP/IP gateway and controllers, ProGrid allows LV network data collection and analysis through all market-renown software solutions for improved and efficient maintenance by DSOs with the ultimate goal of high service availability and lower operation costs for the end-consumer.
Ready for the power grids’
transformation The new smart ProGrid NH fuse switch disconnectors from Mersen offer a tool for complete monitoring and control of medium/low - voltage switchgear. The smart ProGrid solutions allow switchgear manufacturers, electrical installation and building automation specialists to prepare the low-voltage grids of their customers for the challenges of the energy transition.
30 ELECTRICAL ENGINEERING • JUNE 2024
electricalengineeringmagazine.co.uk
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