Multi-circuit metering
Frequently Asked Questions
A single-circuit unit is designed to measure electrical parameters from a single circuit, while a multi-circuit unit can monitor several circuits simultaneously. The choice depends on the number of circuits to monitor and the complexity of the installation.
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The unit is generally connected using current transformers (CTs) and direct connections to the phases (L1, L2, L3) and the neutral. Some versions also allow communication with a supervision system via Modbus RS485 or Ethernet interfaces.
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These units typically measure:
Voltage (per phase and total)
Current
Active, reactive, and apparent power
Power factor
Frequency
Energy consumption
Some advanced units also provide harmonic analysis (up to the 63rd order), imbalance detection, and load curve monitoring.
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No. These measurement units are designed for energy monitoring and management, but do not have MID certification, which is required for official energy billing. For certified metering, a MID-approved energy meter must be used.
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Most single-circuit units feature Modbus RTU communication over RS485, allowing remote access via PC. Communication settings are usually adjustable for easy integration into existing systems. Some models offer additional communication options, such as Modbus TCP, Profibus, Wi-Fi, or BACnet, sometimes via expansion modules.
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Single-circuit measurement units come in several formats to suit different switchboard configurations:
DIN rail mounting – for quick integration into modular enclosures
Panel mounting (flush-mount) – for direct reading from the cabinet front
Breaker-mounted – for compact and embedded installation
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