MT 440 - Multifunction Transducer

Properties

Measurement of the instantaneous values of more than 50 measurands (V, A, kW, kVA, kvar, kWh, kvarh, PF, Hz, bimetal maximum, distortion factor, etc.).
Accuracy class 0.5 for power measurement
16 adjustable alarms
Input frequencies: 50/60Hz, 400Hz
Serial interface (RS232 or RS485 up to 115200 bit/s) and USB 2.0
MODBUS RTU protocol
Up to 4 outputs (analogue outputs, alarm outputs, pulse outputs, universal relay output, universal solid-state output)
Auxiliary voltage universal (24-300V DC, 40-276V AC) or with AC fixed values: 110V, 230V, 400V
Automatic range selection for current and voltage (max. 12.5 A and 600 V_L-N)
Housing for DIN rail mounting
User-friendly programming software MiQen

Description

MT 440 - Multifunction transducer for measuring numerous mains quantities. Output via MODBUS or via 1 to 4 output modules

Application

The MT440 is intended for measurements in single-phase and three-phase networks. The fast sampling of voltage and current signals enables the measurement of true RMS values and fast transients. A built-in microcontroller system calculates the measured values (voltage, current, frequency, energy, power, power factor, distortion factor, phase angle, etc.) from the measured signals.

The MT440 measuring transducer is used for measuring and monitoring all single-phase or three-phase networks. A large selection of different output modules results in a wide range of applications. The MT440 is normally programmed according to the customer's requirements. However, programming can also be done by the customer himself using the MiQen programming software. Serial data transmission is possible via an RS232 or an RS485 interface up to a maximum transmission speed of 115200 baud.

Technical Data

Input

Measuring input

Nominal frequency range (f_N)

50/60, 400 Hz

Current measurement

Nominal values (I_N)

1, 5, 10 A

Nominal current (I_N)

5 A

Max. value

12.5 A sinusoidal

Max. permissible (thermal) limit value

15 A permanent
20 × I_N ; 5 × 1s

Consumption

< I² × 0.01Ω per phase

Frequency measurement

Frequency measuring range (only for frequency measurements)

16 ... 400 Hz

Voltage measurement

Nominal values

62,5, 125, 250, 500 V_LN

Nominal Voltage (U_N)

500 V_LN

Max. value

600 V_LN ; 1000 V_L

Max. permissible value

2 × U_N; 10 s

Consumtion

< U² / 3.3 MOhm per phase

Input impedance

3,3 MΩ

Output

Each of the up to 4 analogue outputs is fully programmable and can be set to one of the 6 ranges (4 current and 2 voltage ranges) without opening the unit. All outputs have the same terminals. It is possible to programme subranges (e.g. 4...20 mA) by entering breakpoints.