The UMD 706 A is a compact high-end power quality measuring device for DIN rail mounting. It measures 4-phase current and voltage with up to three tariffs in 6-quadrant operation in class 0.5 and thus the work in class 0.2s, as well as all usual network sizes, eg harmonics up to the 128th harmonic. It reflects the power quality according to ISO 50160, Class A EN 61000-4-30 *, EN 61557-12, EN 62053-22 and is certified to Class A *. It has a large 512MB memory. The device can be accessed via the Ethernet interface, and the web browser can be used to view live measured values via the web browser. This also Internet protocols such as NTP can be read and it can easily connect to PLC systems and building management systems. Digital inputs / outputs and a serial RS485 interface are integrated.