Digital measurement transducer that allows the measuring of electrical quantities in electrical networks in a single unit. In industries, power plants and substations, transducers are especially used for measurand (e.g. current, voltage, power, phase angle, energy or frequency) assignment into further processing through analog outputs or communication interface for precise control, notification or visualization tasks.

Applications

• Connections in 1-phase systems, in 3-wire and 4-wire systems flexible for power utilities, industrial and commercial sector applications
• Conversion and integration of measurements into substation automation, protection or SCADA process via RTU and/or via protocols IEC 61850, MODBUS TCP, IEC 60870-5-103 for further control and/or monitoring tasks
• Monitoring of lower voltage levels and heavy load control, e.g. air conditioning and motors
• Depending on the device type, the input circuits for voltage measurement are either designed as voltage dividers or they are galvanically isolated. Devices with galvanic isolation can be used without voltage transformers in the power systems IT, TT and TN. Devices with a voltage divider can also be used in these power systems; for IT power systems, however, an upstream voltage transformer is required

Features

• Compact and robust design
• Measurements: up to 60 measured or calculated values
• High accuracy: 0.1 % for voltage and current at rated input IEC 60688, and 0.2 s acc. to IEC 62053-21
• Flexible current measurement range (up to 2 × In))
• 4 fast analog outputs (reaction approx. 120 ms at 50 Hz and 100 ms at 60 Hz) for reliable control
• 2 individual binary outputs for fast switching, indications (e.g., limit violation) and operation status monitoring
• 4 LEDs for local status visualization
• Temperature range: -25 °C to +55 °C/-13 °F to 131 °F
• High EMC immunity: according to standards EN 61000-6-2 and EN 61000-6-4 for the EMC directives, and with the standard EN 61010-1 for the low-voltage directive
• UL Certfication according to standard UL 61010-1
• Ethernet communications via IEC 61850 and MODBUS TCP and optional serial interface via MODBUS RTU or IEC 60870-5-103
• Internal battery for real time clock and saving of energy counter values in case of a power outage
• User-friendly operation through Web server
• Real time clock (RTC), field bus synchronization or network synchronization possible via NTP.

Housing

Snap-on mounting unit,96 mm × 96 mm × 100 mm

Input and output circuits

• 4 inputs for alternating voltage measurements
• 3 inputs for alternating current measurements up to 10 A continuous
• 4 optional DC analog outputs freely configurable:
  Direct currents: 0 mA to 20 mA, 4 mA to 20 mA and -20 mA to 20 mA
  Direct voltages: 0 V to 10 V and -10 V to 10 V
• Individually programmable binary outputs

AC input circuits

X resistive divider

O galvanic isolated voltage transformer

Measuring transducer outputs

X without

O 4 analog outputs (-20…0…20 mA / -10…0…10V)

Degree of protection

X IP20

Integrated Ethernet interface

X Modbus TCP

O IEC 61850

Communication

X without

O RS485 Modbus RTU

O RS485 Modbus RTU and IEC 60870-5-103

Basis function

Recording and calculating of measurements from the

following quantities:

• TRMS (True RMS) for alternating voltage and current
• Active, reactive and apparent power
• Active, reactive and apparent energy
• Power frequency
• Phase angle
• Power factor and active power factor
• Voltage and current unbalance
  Mean value of the 3 phase voltages: Vavg
  Mean value of the 3 phase currents: Iavg.