Power monitoring device for measuring of electrical quantities in electrical networks in a single unit.

Applications

• Measuring and calculation of parameters (e.g. current, voltage, power, phase angel, harmonics and unbalance, energy or frequency) in industries, power plants and substations and assign them into further processing and visualization to control center (SCADA, DMS, EMS etc) through IEC 60870-5-104 or automation system over MODBUS TCP Protocols.
• Monitoring of transformers and decentralized power generation
• Basic power quality profile monitoring (voltage, frequency, harmonics and unbalance)
• Support the integration of online measurement into control center and substation automation
• Option for supporting all power systems IT, TT and TN

Features

• Compact and robust design
• Measurements: more than 100 measured or calculated values
• High accuracy: typically 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)
• 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 Certification according standard UL 61010-1
• 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)
• Transmission of energy points via IEC 60870-5-104 protocol
• KEMA certification – IEC 60870-5-104 de.2 (IS2006)
• Optional extension with 6 binary inputs and 6 binary outputs with sub-device via Ethernet interface

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
• 2 Individually parameterizable binary outputs

AC input circuits

X resistive divider

O galvanic isolated voltage transformer

Degree of protection

X IP20

Ethernet interface

X Modbus TCP

O Modbus TCP and IEC 60870-5-104

Basis function

The following measurands can be recorded or calculated

from the measured quantities:

• Unbalance of alternating voltage and alternating current
• TRMS (True RMS) for alternating voltage and current
• Active, reactive and apparent power
• Active, reactive and apparent energy
• Power frequency
• Angle between phase-to-ground voltage L1-L2 and L1-L3
• Power factor and active power factor
• Voltage and current till 21st
  Mean value of the 3 phase voltages: Vavg
  Mean value of the 3 phase currents: Iavg.

Optional sub-device I/O Unit

O Snap-on mounting unit,96 mm × 96 mm × 100 mm
Integrated Web-Server
Ethernet interface with Modbus TCP
6 Binary inputs with adjustable threshold voltage
6 Relay ouputs (4 NO, 2 CO)