Power Quality Analyzers Janitiza – UMG 511

The UMG 511 Power Quality Analyzer is particularly suitable for monitoring power quality and is certified as a Class A meter to IEC 61000-4-30 Standard.



    All power quality parameters are collected and analyzed e.g. flicker, short term interruptions with fault recorder function, transients, harmonics up to the 63rd, inrush currents etc.

    Extensive communication possibilities e.g. RS 485 Modbus, Profibus, Ethernet (TCP/IP), BACnet, http, FTP, SMTP, SNTP, DNS … allow cost effective and rapid integration in existing communication networks.

    Worldwide access to the embedded web server can be gained through a web browser. The GridVis software, which is included, allows extensive analysis just by the click of a button.

    Areas of application

    • Continuous monitoring of the power quality e.g. EN 50160
    • Ethernet gateway for subordinate measurement points
    • Analysis of electrical faults for network problems
    • Monitoring of the internal distribution network according to EN 61000-4-7, 4-15, 4-30
    • Report generator for EN 50160 analysis
    • Remote control

    Display examples

    The backlit active matrix display of the UMG 511 enables the presentation of measurement values in numerical form, as a bar chart or as a line graph. Selected displays can automatically be displayed sequentially (automatic display rotation). The instrument is programmed using user friendly clear text menus or the GridVis software.


    Main measurement

    The UMG 511 has 4 measurement channels each for current and voltage. The first three channels (main measurement) are intended for use in a three-phase system.
    Auxiliary measurement

    The auxiliary measurement can be used for measurement in a single-phase or symmetrical three-phase system. Alternatively, the current input can be allocated to the three-phase system of the main measurement for measuring the neutral conductor current. For example, the voltage input could then be used for recording the voltage between the neutral conductor and ground. The auxiliary measurement provides all measurement parameters similar to the main measurement (current, voltage, power, harmonics, transients, events and flicker).

    RS485 protocols: Profibus DP or Modbus / RTU, Modbus-Gateway and BACnet
    Fast Ethernet 10/100Base-TX protocols: HTTP, NTP, Modbus TCP, Modbus over TCP, DHCP und BACnet

    The measurement values and recorded data can be called up using the Ethernet (TCP/IP). Parameterization of the instrument and analysis of the data is undertaken using GridVis software included in the delivery. The actual measurement values can be read out using the various field bus protocols (Modbus/RTU, Modbus/TCP, Profibus).


    The power quality analyzer which is equipped with 4 current and voltage inputs collects and digitizes the effective values (True RMS) from currents and voltages in 40-70Hz systems. The integrated microprocessor calculates the electrical parameters from the sampling values. The relevant voltage can be defined as a phase-neutral or a phase-phase voltage for measurement in a three-phase system.

    The voltage serves the UMG 511 as a reference voltage for harmonic measurement, transient and event recording and for the flicker meter. A nominal current can be set using this for the measurement of electrical current events. The 4th current and voltage input represents a separate measurement system. It is generally used for measuring the current in the neutral or ground conductor or used for measuring a voltage difference between N and ground.
    Added value with additional functions

    The UMG 511 power quality analyzer provides continuous monitoring of the power quality This allows the customer to monitor power quality from the electrical utility and the UMG 511 can also be used in applications for failure analysis on the consumer side. By clearly identifying power quality problems customers can take remedial action and then monitor results with a UMG511.

    A rapid, cost-optimized and reliable communication system can be developed through the Ethernet connection. The instrument’s own homepage offers you the opportunity to call up the data or configure the instrument directly using the embedded web server.

    The large number of digital and analogue inputs and outputs offer a variety of communication systems possibilities and allows connection to PLC systems and independent control tasks. The GridVis analysis software represents a fundamental part of the standard delivery. The GridVis can be used to trigger analysis with the click of a button. The presentation of online data and the analysis of historical data is also a benefit for finding the root cause of electrical system problems.
    Digital inputs and outputs

    The 8 digital inputs of the instrument can either be used for tariff switchover, for synchronization, to start the recording, or as other meter inputs for pulses. There are 8 programmable comparators available which can be allocated up to 4 measurement parameters as a limit value comparator. The digital outputs can also be programmed as a signal output for transients, events or as a pulse output.
    Data collection and recording

    The UMG 511 has an internal 256 MB flash memory for continuous recording of all measured data. The measurement value memory is freely configurable with reference to the measurement values which are to be recorded and the recording intervals. The recording interval is also the average time of the respective measurement value. In addition, the highest and lowest actual values (200ms average time) can also be recorded within the interval if you want to save the data as a graph y(t). Obviously it is also possible to store the measurement data in form of histograms (distribution curve).

    The recording of transients and events is initiated by triggers. Transients are recorded from a period larger than 50 micro seconds. Events such as excess currents or under / overvoltage can be safely recorded from half a cycle. Events are recorded with up to 16000 (programmable) half cycles as effective value recorder.

Complete Technical Specifications