
3UG4.1 line monitoring relay
6.6 3UG4615 / 3UG4616 line monitoring relays
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
143
6.6.2
Functions
General functionality
The 3UG4615 line monitoring relays monitor a three-phase system for phase failure,
undervoltage, overvoltage, and phase sequence.
Note
The 3UG4616 line monitoring relays have the same functions as the 3UG4615 monitoring
relays and also monitor the neutral conductor for failure.
The devices feature a wide-range voltage input and are self-powered (measuring voltage
= rated control supply voltage). Depending on the version, the line monitoring relays are
powered with a line-to-line voltage of 160 to 690 V (3UG4615) or with a line-to-neutral
voltage of 90 to 400 V (3UG4616) through terminals L1 / L2 / L3.
The 3UG4615 / 3UG4616 line monitoring relays feature 2 output relays (output relay K1 and
output relay K2).
The 3UG4615 / 3UG4616 line monitoring relays have a display and are parameterized with
three keys.
You will find the setting ranges and factory settings of the available parameters in Chapter
"Operation (Page 146)."
You will find a description of the individual parameters in Chapter "Parameters (Page 363)."
Note
The specified voltages represent the absolute thresholds.