Janitza DIN-rail power quality analyser

The Janitza DIN-rail mounting, UMG 511 power quality analyser is capable of providing 24/7 continuous monitoring and analysis of single- and three-phase, three- and four-wire networks.

The analyser can be employed as a form of protective relay as well as an ethernet gateway in hierarchical analysis and control networks. It measures four voltages and four currents, thus providing complete information for 4-wire three-phase systems including neutral conductor parameters.

Parameters measured by the analyser include transients (from 50 µs), flicker, voltage unbalance, event detection and harmonics from the first to the 63rd harmonic for voltage and current, as well as interharmonics. Additionally three-phase parameters are analysed in positive, negative and zero phasor sequence.

Display methods include phasor diagrams in terms of symmetrical components, waveforms for voltage and current, harmonic bar graph display, rms trend values over time and numerical values.

The analyser is equipped with 256 MB flash memory for events and transients, five digital outputs and eight digital inputs as well as an embedded webserver interface. RS 485 / Fast Ethernet 10/100Base-TX and Profibus DP V0, Modbus RTU, Modbus TCP and Modbus gateway are also provided.