Janitza Power Analyser UMG 103 power meter

The Janitza UMG 103 energy meter is specifically designed for measuring electrical variables such as voltage, current, power, energy and harmonic components. The device is ideal for low-voltage distribution systems and can be installed in any position. The built-in RS485 interface allows for easy reading and transmission of measurement data.

Important features

Voltage measurement:

• LN voltages: max. 240 V.
• Short-term overvoltage: max. 300 Vrms.
• Overvoltage category: CAT III 300 V.

Current measurement:

• Rated current: 5 A.
• Maximum current (1 s): 60 A.
• Resolution: 0.1 mA.

Frequency and harmonics:

• Frequency range: 45–65 Hz, resolution: 0.01 Hz.
• Fourier analysis for the 1st–40th harmonic.

Communication:

• RS485 interface with Modbus RTU protocol.
• Transmission speed: 9.6 kbps - 57.6 kbps.

Power supply:

• The device is powered by the measurement voltage.
• Single phase: 115–277 V (±10%), 50/60 Hz.
• Three-phase: 80–277 V (±10%), 50/60 Hz.
• Power consumption: max. 1.5 VA.

Installation features:

• DIN rail mounting (35 mm).
• Compact dimensions: 98 mm × 71.5 mm × 46 mm.
• IP20 protection.

Environmental conditions:

• Operating temperature: -25°C to +60°C.
• Storage temperature: -20°C to +70°C.
• Maximum operating altitude: 2000 m.

Application areas

• Supervision of building engineering systems.
• Monitoring of electrical distribution cabinets, circuit breakers and busbars.
• Energy monitoring of low voltage distribution systems.

Recommendations

The Janitza UMG 103 power meter offers a reliable and precise solution for monitoring energy consumption and network quality. Its compact design, easy installation and extensive functionality make it the perfect choice for industrial, commercial and residential applications.