Diagnostics; Diagnostics With Led - Siemens SIRIUS 3UG4 Equipment Manual

Function diagrams 3UG4512
Phase failure
11/14
11/12
21/24
21/22
LED
①
②
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:
Operating state
• Supply voltage not present Off
• Supply voltage present
• Correct phase sequence
• All phases available
• Supply voltage present
• Incorrect phase sequence
• Supply voltage present
• Phase failure
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
L1-L2-L3 L2-L3 L1-L2-L3
1
OFF ON
2
Red
Phase failure
LED
Coil symbol (green)
On
On
On
Incorrect phase sequence
L3-L2-L1
LED
OFF
①
②
Phase failure / phase se‐
quence (red)
Off
Off
flashing
On
3UG4.1 line monitoring relay
6.3 3UG4512 line monitoring relay
11/14
11/12
21/24
21/22
1
OFF FLASH OFF
2
Red
Phase sequence
State of the output relays
12/ 11/ 14
22/ 21/ 24
89