UMG 511
(Class A Power Quality Analyser)

Class A Power Quality Analyser

The UMG 511 power quality analyser is particularly suitable for monitoring power quality according to standards such as the EN 50160. All power quality parameters are collected and analysed

Class A
Measuring devices in class A are certified to the IEC 61000-4-30 standard. It provides detailed specifications that a mains analyser must meet so that the results can also be consulted in case of disputes. The standard defines the necessary parameters, suitable measurement methods, accuracy and bandwidths. This makes it possible to easily reproduce and compare results.
Flicker refers to the subjective impression of visibly noticeable brightness fluctuations, caused by a temporal change to the light density or the spectral distribution. The cause is voltage variations. As of a specific threshold value, flicker occurrences become disturbing and harmful to health under certain circumstances. The standard DIN EN 61000-4-15 controls the details.
Powerful RCM residual current monitoring already detects leakage currents in their initial stages before they cause system failures or even fires. It is already integrated in certain UMG measuring devices. The measuring current transformer that is required can be installed manually at a later date if required. Continuous RCM monitoring increases the system safety and availability significantly. In specific applications such as the data centre, residual current monitoring is essential due to the high availability requirements.
Measuring devices homepage
The web server for the measuring device provides a wide range of data in a user-friendly format. The user does not have to install any software on their PC; a conventional web browser is all that is required. The user enters the measuring device IP address in the browser's URL bar and the measuring devices homepage is displayed on the screen. In addition to the modern homepage, APPs are available for an extended range of functions.

Harmonics occur due to operating equipment with a non-linear characteristic, e.g. transformers used in saturation, energy saving bulbs, frequency converters and power electronics. They cause a load on the mains due to additional currents and can affect or even destroy operating equipment. This mains feedback can be detected and documented using power quality analysers.

Alarm Management
The alarm management feature in GridVis® monitors all measurement parameters captured by the UMG measuring devices. It comprises escalation management, a logbook function and user management for individual notifications by e-mail, dialogue box on the monitor, etc.In addition to monitoring effective values, short term interruptions and transients, as well as communication with the measuring devices can also be monitored.

  • Profibus (DP/V0)
  • Modbus (RTU, TCP, Gateway)
  • TCP/IP
  • BACnet (optional)
  • HTTP (Homepage)
  • FTP (File transfer)
  • SNMP
  • TFTP
  • NTP (time synchronisation)
  • SMTP (email function)
  • DHCP

  • Ethernet
  • Profibus / RS485 (DSUB-9)

Power Quality
  • Harmonics up to the 63rd harmonic
  • Flicker measurement
  • Short-term interruptions (> 20 ms)
  • Transient recorder (> 50 μs)
  • Starting currents (> 10 ms)
  • Unbalance
  • Half wave RMS recordings (up to 4.5 min.)

Accuracy of Measurement
  • Energy: Class 0.2S (... / 5 A)
  • Current: 0.2 %
  • Voltage: 0.1 %

Programming language
  • Graphical programming
  • Jasic®
  • PLC functionality

  • IT-, TN-, TT-networks
  • 3- and 4-phase networks

Network Visualisation Software
  • GridVis®-Basic (in the scope of supply)
  • PQ Report Generator

Measured data memory
  • 256 MByte Flash

Peak demand management (optional)
  • Up to 64 switch-off stages

8 digital inputs
  • Pulse input
  • Logic input
  • State monitoring
  • HT / LT switching
  • Emax resetting

5 digital outputs
  • Pulse output kWh / kvarh
  • Switch output
  • Threshold value output
  • Emax output
  • Logic output
(expandable via external I/O modules

Areas of Application
  • Continuous monitoring of the power quality
  • Harmonics analysis with power quality problems
  • Checking the internal supply network according to    1)EN 61000-4-7    2)EN 6100-4-15    3)EN 61000-4-30
  • Fault analysis in case of problems with the energy supply
  • Documentation of the power quality for customers and regulatory authorities
  • Ethernet Gateway for subordinate measurement points
  • Report generator for power quality standards: EN 50160, IEE519, ITIC
  • Report generator for energy consumptions
  • Energy Dashboard
  • Remote monitoring of critical processes


The multi-purpose unit for integration into control panels. Continuous monitoring of the power quality, analysis of electrical interference in the event of network problems.

Power quality
  • Harmonics analysis up to the 63rd harmonic, even / odd (U, I, P, Q)
  • Interharmonics (U, I)
  • Distortion factorTHD-U / THD-I / TDD
  • Measurement of positive, negative and zero sequence component
  • Unbalance
  • Direction of rotation field
  • Voltage crest factor
  • Flicker measurement in accordance with DIN EN 61000-4-15
  • Logging and storage of transients (> 50 μs)
  • Short-term interruptions (> 20 ms)
  • Monitoring start-up processes
High Quality Measurement
  • Constant true RMS measurement
  • Measurement process in accordance with IEC 61000-4-30
  • Certified accuracy of measurement according to class A
  • Continuous sampling of the voltage and current measurement inputs at 20,000 Hz
  • 400 measurement points per period
  • Recording of over 2,000 measured values per measurement cycle
  • Accuracy of active energy measurement: Class 0.2
  • Fast measurement even enables the logging of rapid transients from 50 μs
  • Logging of currents and voltages (15 – 440 Hz)
User-friendly, colour graphical display with intuitive user guidance
  • High resolution colour graphical display 320 x 240, 256 colours, 6 buttons
  • User-friendly, self-explanatory and intuitive operation
  • Backlight for optimum reading, even in darker environments
  • Illustration of measured values in numeric form, as a bar graph or line graph
  • Waveform representation of current and voltage
  • Clear and informative representation of online graphs and power quality events
  • Multilingual: German, English, Russian, Spanish, Chinese, French, Japanese, Turkish .
Various characteristics
  • 4 voltage and 4 current measurement inputs, i.e. logging of N and / or PE possible
  • 8 digital inputs, e.g. as data logger for S0 meter
  • 5 digital outputs for alarm message or e.g. for connection to a BMS or PLC
  • Free name assignment for the digital IOs, e.g. if used as data logger
Modern communications architecture via Ethernet
  • Simple integration in an Ethernet network
  • Reliable and cost-optimised establishment of communication
  • Ideal for Master-Slave structures
  • High flexibility due to the use of open standard
  • Integration in PLC systems and BMS through additional interfaces
  • Various IP protocols: SNMP, ICMP (Ping), NTP, FTP
Measuring device homepage
  • Web server on the measuring device, i.e. device's inbuilt homepage
  • Function expansion possible through APPs
  • Remote operation of the device display via the homepage
  • Comprehensive measurement data incl. PQ (transients, events...)
  • Online and historic data available directly via the homepage
  • Waveform representation of current and voltage
BACnet protocol for building communication
  • Optimal interoperability between devices from various manufacturers
  • Predefined BIBBs (BACnet Interoperability Building Block)
  • BACnet is optionally available with UMG 511
  • UMG 511 supports the device type B-SA with the BIBBs DS-RP-B and DS-WP-B
  • DS-RP-B und DS-WP-B
  • Furthermore, the BIBBs DS-COV-B and DM-UTC-B are also supported
Programming / PLC functionality
  • Further processing of the measurement data in the measuring device (local intelligence)
  • Monitoring and alarm functions simple to program
  • Sustainable functional expansions far beyond pure measurement
  • Comprehensive programming options with    Jasic® source code programming    Graphical programming
  • Complete APPs from the Janitza library
Large measurement data memory
  • 256 MB data memory
  • Memory range up to 2 years (configuration-dependent)
  • Individually configurable recordings
  • Recording averaging times can be freely selected
  • PQ recordings template preconfigured for conventional standards (e.g. EN 50160)
  • User-defined memory segmenting possible
Powerful alarm management
  • Information available immediately by email
  • Inform maintenance personnel via the powerful device homepage
  • Via digital outputs, Modbus addresses, GridVis® software
  • Programming via Jasic® or graphical programming
  • Further alarm management functions via GridVis®-Service alarm management
Peak load representation and peak load management
  • llustration of the 3 highest monthly power peaks on the LCD display (P, Q, S)
  • Rolling bar chart representation of the peak power values over 3 years on the LCD display (P, Q, S)
  • Plain text representation on the LCD display (P)
  • Emax control of up to 64 channels (optional)
GridVis®-Basic power quality analysis software
  • Multilingual
  • Manual read-out of the measuring devices
  • Manual report generation (power quality and energy consumption reports)
  • Comprehensive PQ analysis with individual graphs    1) Online graphs    2) Historic graphs    3) Graph sets
  • Integrated databases (Janitza DB, Derby DB)
  • Graphical programming
  • Topology views
  • High memory range
Certified quality through independent institutes
  • ISO 9001
  • Energy management certified according to ISO 50001
  • Class A certificate (IEC 61000-4-30)
  • UL certificate
  • EMC-tested product
Dimension Diagrams(in mm)
Typical Connections