Legally secure power quality analysis
The Class A power quality analyser UMG 512 has mastered all of the disciplines in its field, such as constant monitoring of the power quality, harmonics analysis with network problems, checking the internal supply network according to EN 61000-4-7, EN 6100-4-15, EN 61000-4-30, etc. Through certification class A according to IEC61000-4-30 it is also a reliable reference in cases of disputes, for documentation of the power quality for customers and regulatory authorities, or for fault analysis with problems in the power supply. This subject has further gained in importance this year, due to a ruling by the Federal Supreme Court (file ref.: VI ZR 144/13). In the opinion of the Federal Supreme Court, electricity is a product according to § 2 of the German Product Liability Act (ProdHaftG). As a result, the distribution system operators are liable if electrical equipment is damaged due to poor power quality. The court expressly rejected an exemption from liability through the Low Voltage Grid Connection Ordinance (NAV).
The UMG 512 is designed to record the large quantities of data that occur at its high sampling rate of 25,600 Hz or during a continuous true RMS measurement. To ensure that the quantity of measured values is retained even if the data network fails, the unit is equipped with a large on-board measurement data memory with a capacity of 256 MB. Thanks to the large memory, PLC functions such as alarm management can also be implemented.
In addition to two digital and analogue channels respectively, there is an input for temperature measurement and two additional RCM channels.
The large, colour graphic display is intuitive to operate and provides easy access to the many functions and measuring points. The display can present measured values and results not only in numerical format but also as bar charts and line graphs. Current and voltage can be displayed in waveform. In addition, the GridVis®-Basic software package included in the scope of supply also simplifies evaluation and documentation.
The communication architecture also leaves no wish unfulfilled. The various Ethernet protocols ensure the cost-efficient remote monitoring of critical processes, for example. As a Modbus gateway, the UMG 512 can economically connect subordinate measurement devices without an Ethernet interface. The device-specific homepage for the measuring devices is ideal for users or target groups within a company, who do not wish to install the GridVis® software or do not require it. For access to this, the user simply requires a conventional web browser and an Ethernet connection (or a local patch cable). The UMG 512 utilises the BACnet protocol for use in building communication.