Powerful residual current monitoring (RCM) detects residual currents at the initial stage, before they lead to system failures or even fires. It is already integrated into certain UMG measurement devices. The required RCM measuring current transformers can even be retrofitted if required. Continuous RCM monitoring significantly increases system safety and availability. In certain applications such as data centers, residual current monitoring is mandatory due to high availability requirements.

Harmonics currents are caused by equipment with non-linear characteristics, such as transformers operated in saturation, energy-saving lamps, frequency converters, and power electronics. They load the grid with additional currents and can affect or even destroy equipment. These grid distortions can be detected and documented using power quality analyzers.

Many UMG measurement devices have an RS-485 interface with Modbus RTU protocol, which enables extremely cost-effective networking. It is characterized by a simple topology structure and insensitivity to EMC interference. Communication between the transmitter and receiver is wired via a shielded, twisted pair cable.

The GridVis® alarm management system monitors all measurement parameters obtained by the UMG measurement devices. It includes escalation management, logbook function, and user management for individual notifications by e-mail, pop-up window on the monitor, etc. In addition to monitoring RMS values, short-term interruptions and transients as well as communication with the measurement devices can also be monitored.

GridVis® is a comprehensive and scalable software for setting up an energy monitoring system and for monitoring power quality. It is used for programming and configuring many UMG measurement devices as well as for reading, processing and analyzing measurement data. Typical applications are energy supply, industrial plants, facility management, etc.

While power quality analysis and energy management play a major role at the main feed-in, individual currents tend to be recorded in subdistribution panels. The UMG 20CM energy and residual current measurement device has 20 current channels for this purpose, i.e. connections for current transformers. This allows operating currents of up to 600 A and residual currents of 10 mA to 1000 mA to be recorded.