Siemens SIRIUS 3UG4 User Manual

4.3.3 Con󹪝guration of load feeders
Table 4-6 Load feeders with 3RR2 current monitoring relays
Feature Bene󹪝t 3RR21 Basic,
analog setting
3RR22 Standard,
digital setting
Short-circuit-proof up to 100 kA at 690 V
(in conjunction with the appropriate fuses
or the appropriate motor starter protector)
• Provides optimum protection of
the loads and operating person‐
nel in the event of short circuits
due to insulation faults or faulty
switching operations
✓ ✓
Electrical and mechanical matching to
3RT2 contactors
• Simpli󹪝es con󹪝guration
• Reduces connection outlay and
costs
• Enables stand-alone assembly
as well as space-saving direct
mounting
✓ ✓
Spring-loaded connection system for
main circuit (option) and auxiliary circuit
(option)
• Enables fast connections
• Ensures that connections are vi‐
bration-resistant
• Enables maintenance-free con‐
nections
✓ ✓
4.3.4 Combinations with 3RT20 contactor
Monitoring re‐
lay type
Current
range
3RT20 1 S00 contactors
3/4/5.5/7.5 kW
3RT20 2 S0 contactors
5.5/7.5/11/15/18.5 kW
3RT20 3 S2 contactors
18.5/22/30/37 kW
3RR2141 1.6 to 16 A ✓ X X
3RR2241 1.6 to 16 A ✓ X X
3RR2142 4.0 to 40 A X ✓ X
3RR2242 4.0 to 40 A X ✓ X
3RR2143 8.0 to 80 A X X ✓
3RR2243 8.0 to 80 A X X ✓
X = with stand-alone assembly support
You can 󹪝nd further technical information on 3RR24 in the Manual "3UG48/3RR24 monitoring
relays for IO-Link (
http://support.automation.siemens.com/WW/view/en/54375430)" on the
internet.
3RR2 current monitoring relays
4.3 Performance features of current monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
54 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005

Siemens SIRIUS 3UG4 Specifications

General

Brand	Siemens
Model	SIRIUS 3UG4
Category	Relays
Language	English