Smart meters in LV distribution cabinets are installed, wired, and connected to communication networks by trained personnel, ensuring safe operation, accurate measurement, and integration with energy management systems.

Installation and Mounting

Smart meters should be installed in a suitable, well-ventilated, and sheltered location within the LV or MN cabinet. The cabinet must comply with standards such as DIN VDE 0603-1 and VDE-AR-N 4101, providing sufficient space for the meter, smart meter gateway (SMGW), and optional control units . The meter is secured in the enclosure and connected to the main power supply terminals, including each phase (A, B, C) and neutral . Proper insulation, waterproofing, and cable routing are essential to ensure safety and reliability.

Wiring and Electrical Connection

Wiring must follow current regulations (DIN VDE 0100). Conductors are connected to the meter's main terminals, ensuring correct phase and neutral connections. Only qualified personnel should perform this step to prevent electric shock and ensure compliance with safety standards . For three-phase systems, each phase is connected individually, and the neutral is properly grounded. Junction boxes should be installed correctly to protect connections and facilitate maintenance.

Communication and Network Integration

Smart meters transmit data via the smart meter gateway (SMGW) using communication interfaces such as LAN, PLC (Power Line Communication), or mobile radio modules (LTE) . Additional interfaces like RS485, M-Bus, or optical ports allow local data access. The meter can be integrated into building automation systems using protocols like KNX, Modbus, or BACnet, enabling energy monitoring, load balancing, and predictive maintenance . Data is collected and transmitted to the grid management platform for monitoring and operational management.

Operation and Maintenance

After installation, the meter should be continuously monitored. Battery replacement, software updates, and verification of data transmission are necessary to maintain accurate operation . Smart meters recognize only their specific power cards; inserting the correct card ensures proper energy consumption tracking. For meter replacements, a preset electricity amount may be provided to allow immediate operation while completing account registration .

Advanced Monitoring in LV Cabinets

In advanced LV supervision systems, such as ZIV's 4SLV, smart meters can be combined with current sensors and measurement units to monitor each feeder output, detect load imbalances, blown fuses, and earth faults, and map meters to feeders for accurate network topology . This enables energy balancing, phase load monitoring, and improved outage management.

Safety Considerations

Always ensure personal protection, proper insulation, and compliance with local electrical codes. Only trained personnel should operate or maintain smart meters in LV cabinets to prevent electric shock and ensure reliable energy measurement . By following these procedures, smart meters in low-voltage distribution cabinets can provide accurate energy measurement, reliable communication, and integration with energy management systems, supporting efficient and safe operation of the electrical network.