Transformer station monitoring: Innovative solution in accordance with Section 14a EnWG
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Comprehensive grid parameter measurement
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Communication even in remote stations
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Robust and ready for connection
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Supports grid operators with Section 14a EnWG
🔗📄 Data sheet (PDF, 124 KB)
Digitization of transformer stations becomes mandatory
The new measuring and communication box is a ready-to-connect solution for digitizing transformer stations in the low-voltage range.
The system records all relevant grid parameters such as current, voltage, power and temperature and reliably supports grid operators in implementing Section 14a of the German Energy Industry Act (EnWG) for controllable consumption devices.
Thanks to modern communication via LoRaWAN and LTE/4G, even remote stations can be securely integrated into existing monitoring structures.
Comprehensive grid parameter measurement
The Q3 monitoring box measures:
- Amperages up to 600 A per conductor (higher values optional)
- Current direction and voltage values
- Power factor (cos φ)
- Temperature in the station environment
Contactless current detection is precise and low-maintenance via hinged current transformers.
Robust communication & data security
- With LoRaWAN and mobile radio (LTE/4G) as standard
- Secure data transmission even from remote transformer stations
- Integrated battery buffering for fail-safe operation
Ready for connection and robust in use
Supplied fully pre-assembled in a weather and UV-resistant polycarbonate housing (IP66/67) - ready for immediate use, even for protected outdoor use.
Flexible extensions & control
- Monitoring of up to 24 lines (8 three-phase circuits), optionally expandable to 32 lines
- Two integrated relay outputs for remote switching of components
- On request: powerful monitoring platform for visualization and analysis
Support with Section 14a EnWG
The digitalization of transformer stations is a central component of Section 14a EnWG: grid operators must be able to regulate controllable consumption devices (e.g. charging infrastructure, heat pumps) in a way that serves the grid. Digital recording systems are essential for this. With the Q3 solution, grid operators and energy supply companies can meet the legal requirements efficiently and future-proof.
Transformer station monitoring - §14a EnWG - Controllable consumption device - Measuring unit for transformers
Our measuring unit for transformers can measure 8x 3 current paths (L1, L2, L3 each), circuits or 24 power lines up to 600 amperes via hinged transformers, namely the following values:
- Voltage L1, L2, L3
- Frequency
- Power x24 cables
- Cosine Phi of each line
- thus also the current direction
- Active power, apparent power, reactive power
Monitoring transformer stations
- Measuring unit for transformers
- Digital monitoring of transformer stations
- Data transmission via radio (GSM | LoRA WAN)
- LAN interface (e.g. for maintenance work)
- Optionally up to 32 measurement inputs with up to 600 A
- Additional 5 V DC power supply on board for connecting external devices
- Folding transformer: Connection via spring terminals or pluggable from outside
- Data backup: The system is buffered by a battery and can continue to transmit data for up to 24 hours in the event of a power failure
- installed in IP67 polycarbonate housing with transparent cover
LEW Verteilnetz (LVN) user report on our transformer box
We have been working successfully with Q3 ENERGIE for over seven years now and have developed numerous innovative solutions during this time - from soil moisture sensors to dog toilets for our Inno. Live Smart City system.
We also jointly commissioned the Powerbox Grid 2.0 in 2024 to precisely record the energy flows in our local grid stations. The first boxes are now being used by us and two other grid operators for test purposes. The results so far are very promising and confirm the potential of the new solution for the digitalization of the grids. The boxes are quick and easy to install, the measurement results are reliable and data transmission is error-free.
Particularly in times of the energy transition, it is crucial to know exactly how much electricity is being fed into our grids from PV systems. The tests will continue until the end of 2025, after which we will deploy the boxes specifically where they provide us with the best support in certain areas.
We particularly value Q3's high level of flexibility and ability to quickly turn practical solutions into market-ready products. Together, we are driving forward the intelligent and sustainable further development of our network infrastructure.
Christian Mayr, Head of Technology Center at LVN
Technical drawing
Example: Monitoring box setup
