Smart measuring and monitoring

Simply.More.Transparency.

Volatile feeders, e-mobility and new load profiles are significantly increasing the demands on energy distribution networks. Precise measurement data directly in local network stations and distribution cabinets is required for stable operation. In this video, EFEN shows how smart measurement technology – from integrated current transformers and MEM modules to network-wide visualisation – makes existing systems efficient and enables end-to-end digitalised network monitoring.

Compact Intelligence for Maximum Grid Transparency

With the Measurement Electronic Module (MEM 1 Gen.2), EFEN introduces a compact and powerful solution for capturing electrical measurement data in distribution networks. The module is ideal for simple retrofitting or new installations and provides the foundation for a transparent and efficiently monitored low‑voltage grid.

Technical Highlights

• Click‑and‑Fix mounting directly onto E‑series NH fuse‑switches vertical design disconnectors
• Ultra‑compact installation height of just 40 mm
• Modbus communication or optional wireless transmission
• Fast commissioning thanks to intuitive configuration
• Flexible application from cable distribution cabinets to transformer stations

The MEM 1 Gen.2 makes grid transparency easier than ever – space‑saving, robust and ready for immediate operation.

Convenient Measurement for Modern Power Distribution

The EFEN Measurement Electronic Module enables reliable and convenient monitoring of grid conditions in power distribution systems. Integration is fast and clean – without extensive wiring effort and without modifying existing system structures.

Your benefits at a glance:

• Direct mounting with minimal wiring effort
• Local addressing for fast and secure system integration
• Data transmission via Modbus for seamless integration into control systems
• Easy disconnection of the module for quick cable fault location

Simple Retrofit of Existing Installations

In combination with the E‑series NH fuse‑switches vertical design, sizes 2–3, the MEM 1 Gen.2 offers a particularly simple way to upgrade existing installations with complete current measurement. Integration requires no additional installation space – ideal for modernization projects and the digitalization of existing grid infrastructures.

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• In conjunction with the E-series NH fuse-switches vertical design, sizes 2 to 3, the Measurement Electronic Module (MEM 1) offers a quick and easy way to retrofit the complete current measurement of the existing system.
• All data for the grid analysis is made available via Modbus
• Its compact design (installation height 40 mm) offers a wide range of installation options
• The MEM 1 has 3 voltage inputs
• Integrated protection of the voltage measurement in CAT IV

The changes in the energy supply network pose new challenges for everyone involved. New energy sources are making the generation of energy more remote, more volatile and more decentralised. The current grid status values must be combined in line with demand due to the strongly fluctuating energy flows and, with increasing e-mobility, higher consumption peaks for charging processes, in order to smartly combine supply and demand. Here, the intelligent utilisation of the existing grid structure is opposed to grid expansion and it is important to measure the grid at various neuralgic points. With the Measurement Electronic Module (MEM 1), EFEN offers you a space-saving option – for more intelligence in your grid.

• The Smart Grid Interface Module (SGIM) is used for 3-phase monitoring of up to 14 low-voltage connections
• Recording of the current energy values: voltage, current, grid frequency, phase angle, active power, reactive power, apparent power and electricity meter
• Monitoring of switch cabinet temperature and humidity
• The SGIM offers 8 module slots for application-specific configuration. These include the CPU gateway with integrated web server, GSM interface or fibre optic interface, RF interface and measuring modules for current transformers or Rogowski coils
• Load switches or circuit breakers can be controlled via an I/O module
• Internet connection via LAN, fibre optic, UMTS, LoRaWan
• Availability of measurement data on portal server
• DIN-compliant installation in the 185 mm rail system of the cable distributor or on a mounting wall
• Uninterrupted installation with ‘plug & play’ commissioning
• Industrial standard solution for nationwide roll-out
• Investment protection through retrofittability of functions

The requirements for energy distribution are changing rapidly and comprehensively in terms of utilisation, functionality and structures. To ensure reliable operation, supply network operators, industrial companies and facility management increasingly require up-to-date measured values and information about the load on their distribution networks. This information needs to be provided almost in real time in order to be able to take appropriate control measures, particularly in hot spots such as local grid stations.

The smartisation of energy distribution grids requires practical solutions for the systematic measurement of energy values: simple and uninterrupted installation in existing systems, flexibility with regard to the number of measuring points and handling without the need for extensive training. With the Smart Grid Interface Module Comfort, EFEN offers a modular system for recording electrical and other physical measured variables in distribution cabinets and cable distributors.

Individually configurable

Thanks to its compact design, the SGIM Comfort fits into the spare slot in the cable distribution cabinet and offers a wide range of possible applications. With just one device, you can carry out 3-phase monitoring of up to 14 low-voltage connections. Upgrades with measuring and communication modules complete the modular system.

Simple installation

Uninterruptible ‘plug & play’ installation under voltage on a 185 mm busbar system. In conjunction with the Rogowski coils, you have a quick and easy way to integrate the complete current measurement into your existing system at a later date – freely configurable according to your requirements. We recommend our pre-assembled E³ NH fuse-switches with integrated current transformers for a new installation.

Integrated safety

The integrated CAT IV overvoltage protection safeguards your devices. You can also rely on the protection of an integrated firewall, so that your network analysis data is protected against attacks and secured in accordance with modern transmission protocols.

• Measurements in distribution grids already show significant harmonic components, for example due to the increased use of inverters
• Small signal converters (SSC) are characterised by a high input dynamic range
• The output power is very low compared to conventional technology
• In addition, in contrast to converters, SSCs cannot be overloaded and destroyed in the event of short circuits in the secondary loop
• Used particularly in the lower distribution network levels

• EFEN offers complete lines of plug-on current transformers for primary currents up to 5,000 A as well as tube-type current transformers up to 600 A for cable measurements or for NH fuse-switches
• The current transformers are also available in a compliant version for calculation purposes, in accordance with the law on the reformation of legal measuring systems and adaptation to European jurisdiction
• Conformity-tested range of low-voltage current transformers according to module D or F

The E³ current transformer block size 00/100 is available in 5 A and 1 A versions. The 5 A version is already equipped with the corresponding connection cables. The E³ current transformer block is simply plugged onto the rear of the E³ NH fuse-switch-disconnector 00/100 WV without changing the installation depth. This version is available in 1- and 3-pole versions with frame terminals up to 95 mm² or with universal connection.

• Effective installation of the E³ current transformer block size 00/100 by plugging it onto the rear of the NH fuse-switch-disconnector
• Neat cable routing of the individual phases within the E³ current transformer block reduces the wiring effort
• Easy connection of the secondary connections via the terminals on the head side for the 1 A version and pre-assembled 2 m connection cables for 5 A

More information: E³ current transformer block size 00-100.pdf

E³ current transformer blocks in sizes 1 to 3 are used for current measurement in the connection compartment of the E-series NH fuse-switch-disconnectors. The current transformers are available in the standard current ratings with a ratio of 5 A.

• Compact design: With a width of 100 mm, the E-series current transformer blocks in sizes 1 to 3 fit into the grid dimensions of the corresponding device sizes
• The current transformer block is screwed directly onto the output rails of the E-series NH fuse-switch-disconnectors. This ensures a secure and firm connection, which guarantees high measuring accuracy
• The 4 mm² frame terminals ensure a perfect connection of the secondary cables
• The E series current transformer blocks have a voltage tap per outer conductor as standard

More information: E³ current transformer block sizes 1-3, standard calibratable.pdf