Siemens 3UG4 User Manual

3UG463. voltage monitoring relay
10.2 3UG4631 / 3UG4632 voltage monitoring relay
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
273
10.2.2
Functions
General functionality
Depending on the setting, the 3UG4631 / 3UG4632 voltage monitoring relays are powered
with a rated control supply voltage of 24 V AC/DC or 24 to 240 AC/DC and monitor an AC
voltage or DC voltage at terminals IN and M of the device for
overshoot
(U▲) or
undershoot
(U▼) or in
range monitoring
(U▲ and U▼).
The 3UG4631 / 32 voltage 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 278)."
You will find a description of the individual parameters in Chapter "Parameters (Page 363)."
Monitoring
The output relay K1 responds in accordance with the set relay switching behavior (closed-
circuit principle NC or open-circuit principle NO). The set tripping delay time starts if the
monitored voltage overshoots or undershoots the corresponding set threshold value. After
expiry of the tripping delay time, the output relay K1 changes the switching state. On the
display, the currently displayed measuring value and the symbol for undershoot or overshoot
flash.
An output change-over contact is available as a signaling contact.
If the rated control supply voltage is switched on and no monitoring voltage is yet present,
the display indicates 0.0 V and shows a symbol for voltage overshoot monitoring, voltage
undershoot monitoring, or range monitoring.
You will find the switching states of the output relay below in the section entitled "Function
diagrams" and in Chapter "Diagnostics (Page 279)."

Siemens 3UG4 Specifications

General

Type of voltage	AC/DC
Number of CO contacts for auxiliary contacts	1
Number of NC contacts delayed	0
Number of NO contacts delayed	0
Number of change-over switches delayed	0
Number of NC contacts undelayed	0
Number of NO contacts undelayed	0
Number of change-over switches undelayed	1
Width	22.5 mm
Housing Width	22.5 mm
Operating Temperature	-25 ... 60 °C
Protection Class	IP20
Design of the product	Monitoring relay
Type	Monitoring relay
Operating frequency rated value	50 ... 60 Hz
Rated Operational Current	0.1 ... 10 A
Adjustable response value current	0.1 ... 10 A
Contact Configuration	1 CO contact
Operating range factor control supply voltage rated value at AC	0.8-1.1 x Un
Operating range factor control supply voltage rated value at DC	0.8-1.1 x Un