User Manual

3UG4.1 line monitoring relay
6.3 3UG4512 line monitoring relay
3UG4 / 3RR2 monitoring relays
Manual, 02/2013, NEB927043002000/RS-AA/002
101
6.3.3 Diagnostics
6.3.3.1 Diagnostics with LED
Status display
The following information about the operating state is displayed on the 3UG4512 line
monitoring relay:
LED State of the output relays Operating status
Coil symbol (green) Phase failure / phase
sequence (red)
12/ 11/ 14
22/ 21/ 24
• Supply voltage not
present
Off Off
• Supply voltage present
• Correct phase sequence
• All phases available
On Off
• Supply voltage present
• Incorrect phase
sequence
On flashing
• Supply voltage present
• Phase failure
On On
You will find more information about the switching behavior of the output relays in Chapter
"Function (Page 99)."