Functions - Siemens 3UG4 User Manual

3UG4.1 line monitoring relay
6.5 3UG4614 line monitoring relay
6.5.2

Functions

General functionality
The 3UG4614 line monitoring relays monitor a three-phase system for phase asymmetry,
undervoltage, phase failure, and phase sequence.
The devices feature a wide-range voltage input and are self-powered (measuring voltage
= rated control supply voltage). The 3UG4614 line monitoring relays monitor all phases of
three-phase AC networks from 160 to 690 V through terminals L1 / L2 / L3 and also draw
power from all three phases simultaneously.
The 3UG4614 line monitoring relays feature 2 output relays (output relay K1 and output relay
K2). The relays work synchronously.
You will find the setting ranges and factory settings of the available parameters in Chapter
"Operation (Page 135)."
You will find a description of the individual parameters in Chapter "Parameters (Page 363)."
Note
The specified voltages represent the absolute thresholds.
132
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004