Siemens SIRIUS 3UG4 - Overview of the Functions

3.5 Overview of the functions
3.5.1 3RR2 current monitoring relays
Table 3-7 Functions of the 3RR21 / 3RR22 current monitoring relays for analog and digital setting
Function Current monitoring relay
3RR21 3RR22
Current monitoring
Monitoring for undercurrent 2p 3p
Monitoring for overcurrent 2p 3p
Apparent current monitoring ✓ ✓
Active current monitoring — ✓
Range monitoring 2p 3p
Monitoring for phase failure, wire break 2p 3p
Monitoring for phase sequence — ✓
Internal ground-fault detection (fault current
monitoring)
— ✓
Blocking current monitoring — ✓
Supply voltage
Self-powered, without auxiliary voltage — —
Externally powered, with auxiliary voltage ✓ ✓
✓: Function available
2p: Monitoring is 2-phase
3p: Monitoring is 3-phase
— : Function not available
3.5.2 3UG45 / 3UG46 monitoring relays
Table 3-8 Functions of the 3UG45/3UG46 monitoring relays for analog and digital setting
Function Monitoring relays
3UG45 3UG46
01 11 12 13 8 14 15 16 17 18 31 32 33 21 22 41 25 51
Line monitoring and voltage monitoring
Monitoring for phase sequence — ✓ ✓ ✓ — ✓ ✓ ✓ ✓ ✓ — — — — — — — —
Monitoring for phase failure — ○
1)
✓ ✓ — ✓ ✓ ✓ ✓ ✓ — — — — — — — —
Monitoring for asymmetry — — 10
%
20
%
— ✓ ○
2)
○
2)
✓ ✓ — — — — — — — —
Monitoring for undervoltage — — — 3p — 3p 3p 3p 3p 3p 1p 1p 1p — — — — —
Monitoring for overvoltage — — — — — — 3p 3p 3p 3p 1p 1p 1p — — — — —
System overview
3.5 Overview of the functions
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 41