MT-50
Modular power quality monitor for the most demanding systems.
- Class A, up to 16 measurement channels
Measuring Terminal MT-20A
Measuring terminal for measurement, monitoring, recording and analysis of power quality in generation and distribution systems.
The MT-20A measuring terminal is designed for measurement, monitoring, recording and analysis of electrical quantities in power generation and distribution systems. Fast sampling lets the processor compute true RMS values of currents, voltages, powers, energies, power factor and frequency, and analyse power quality in accordance with EN 50160 and IEC 61000-4-30 Class A.
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Power quality – Class A
Power quality analysis per EN 50160 and IEC 61000-4-30 Class A: harmonics up to the 63rd, THD, voltage dips and swells, RVC, flicker, transients and unbalance.
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True RMS measurement
True RMS measurement of currents, voltages, RVC, frequency, power and power factor.
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Energy metering by tariff
Active and reactive energy (EP, EQ) metering by tariff and total (up to four tariffs), plus peak, average and minimum values with time stamping.
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Recording & storage
Flexible recording of measured quantities with storage on an SD card up to 8 GB.
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Communication
10/100 Ethernet and two RS-232/RS-485 ports (optional optical); MODBUS RTU/TCP, IEC 60870-5-101/103/104 and IEC 61850.
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Monitoring & control
4 digital inputs, 4 digital outputs and 4 analog outputs (option), with a 320×240 colour graphic LCD display.
- Current inputs
- 3+1; rated current up to 5 A (autorange); range 0–1.5 IN; LPCT 225 mV (option)
- Voltage inputs
- 3+1; declared UDIN 50–300 V (autorange); range 0.1–2.0 UDIN; LPVT 3.25/√3 (option)
- Accuracy – voltage / current
- U: 0.1% UDIN; I: 0.1% MV ± 0.02% FSR
- Accuracy – power
- P, Q, S, cos φ: 0.2% MV ± 0.02% FSR
- Accuracy – energy
- EP: EN 62053-22, class 0.2S; EQ: EN 62053-24, class 1S
- Harmonics
- up to the 63rd harmonic; IEC 61000-4-7, class 1
- Frequency
- accuracy ± 10 mHz
- Digital inputs / outputs
- 4 inputs; outputs: 2 solid-state (100 mA/30 V) + 2 relay (220 V DC, 80 W) – option
- Analog outputs
- 4 (4–20 mA, 0–10 V) – option
- MD interval
- 1–30 min
- Memory
- SD card up to 8 GB
- Display
- colour graphic LCD, 320×240
- Communication
- 10/100 Base-Tx(Fx) Ethernet; 1(2)× RS-232/RS-485; optical (option); mini USB (front panel)
- Protocols
- MODBUS RTU/TCP; IEC 60870-5-101/103/104; IEC 61850
- Synchronisation
- SNTP (GPS)
- Power supply
- 230 V AC (+10/−20%); 24/48/110/220 V DC; option from the measuring circuit; consumption < 8 VA
- Temperature range
- 0…+50 °C (extended −20…+60 °C)
- Insulation
- 2.5 kV, 50 Hz, 1 min
- Mounting & dimensions
- panel 96×96×90 mm
Measurement inputs
Accuracy & analysis
Inputs & outputs
Data & display
Communication
General
- EN 50160
- IEC 61000-4-30 Class A
- IEC 61000-4-7
- IEC 61000-4-15
- EN 62053-22 (class 0.2S) – active energy
- EN 62053-24 (class 1S) – reactive energy
- EMC/safety: EN 61000-6-2/4, EN 61326-1, EN 61010-1/2
- MODBUS RTU/TCP
- IEC 60870-5-101/103/104
- IEC 61850
- PQDIF, COMTRADE
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