Monitoring Relays for line and single-phase voltage monitoring

The 3UG451/461/463 monitoring relays provide a maximum degree of protection for machines and systems. They facilitate the early detection of line and voltage faults, allowing for their rectification before any consequential damage can occur. Furthermore, 3UG481/483 monitoring relays are available with IO-Link connection.

Advantages at a glance

  • Applicability in all global networks from 160 to 600 V AC without separate auxiliary voltage thanks to wide voltage range

  • Variably adjustable to exceedance, shortfall or window monitoring

  • Freely parameterizable delay times and reset behavior

  • Narrow width for all versions

  • Permanent display of actual value and power system fault type with digital versions

  • Automatic direction of rotation correction thanks to differentiation between power system fault and incorrect phase sequence