Janitza UMG 801 power-quality-analysator, modulaire DIN-rail, 8 TE 5231003

Electrical engineers and facility managers use the Janitza UMG 801 in industrial plants and large commercial buildings to monitor power quality and energy consumption. This modular network analyzer mounts on a DIN rail and occupies 8 TE (width modules). It measures voltage, current, power, energy, frequency, power factor, THD, flicker, unbalance, transients, and sag/swell. The device meets Class A power quality standard (IEC 61000-4-30 Ed. 3) and offers active energy accuracy Class 0.2S (IEC 62053-22).

Key specifications

• Direct voltage measurement: up to 300 V L-N / 520 V L-L
• Current transformer input: 1 A / 5 A secondary
• Measurement category: 300 V CAT III (voltage inputs), 600 V CAT III (supply)
• Harmonics analysis: up to 63rd harmonic
• Sampling rate: 20 kHz per channel
• Communication: Ethernet (RJ45), RS485 (Modbus RTU)
• Internal memory: 256 MB for data logging
• Display: integrated graphical LCD
• Supply voltage: 95-240 V AC/DC
• Digital inputs: 2; digital outputs: 2
• Frequency range: 45 - 65 Hz
• Protection: IP50 front, IP20 housing

Why choose it

The UMG 801 is modularly expandable with plug-in modules, allowing adaptation to specific measurement tasks. Its Class A power quality compliance ensures reliable data for audits and troubleshooting. The integrated display provides immediate local readings, while Ethernet and RS485 enable integration into energy management systems.

Ideal use cases

• Power quality monitoring in industrial facilities
• Energy data acquisition for ISO 50001 energy management
• Sub-metering in commercial buildings
• Monitoring of critical loads such as data centers

Good to know

The device supports direct voltage measurement up to 300 V L-N, making it suitable for low-voltage networks. For higher voltages, external potential transformers are required. The modular design allows adding communication or I/O modules as needed.