Configuration Of Load Feeders; Combinations With 3Rt20 Contactor - Siemens SIRIUS 3UG4 Equipment Manual

3RR2 current monitoring relays
4.3 Performance features of current monitoring relays
4.3.3

Configuration of load feeders

Table 4-6 Load feeders with 3RR2 current monitoring relays
Feature
Short-circuit-proof up to 100 kA at 690 V
(in conjunction with the appropriate fuses
or the appropriate motor starter protector)
Electrical and mechanical matching to
3RT2 contactors
Spring-loaded connection system for
main circuit (option) and auxiliary circuit
(option)
4.3.4

Combinations with 3RT20 contactor

Monitoring re‐ Current
lay type range
3RR2141 1.6 to 16 A
3RR2241 1.6 to 16 A
3RR2142 4.0 to 40 A
3RR2242 4.0 to 40 A
3RR2143 8.0 to 80 A
3RR2243 8.0 to 80 A
X = with stand-alone assembly support
You can find 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.
54
Benefit
• Provides optimum protection of
the loads and operating person‐
nel in the event of short circuits
due to insulation faults or faulty
switching operations
• Simplifies configuration
• Reduces connection outlay and
costs
• Enables stand-alone assembly
as well as space-saving direct
mounting
• Enables fast connections
• Ensures that connections are vi‐
bration-resistant
• Enables maintenance-free con‐
nections
3RT20 1 S00 contactors
3/4/5.5/7.5 kW
✓
✓
X
X
X
X
3RR21 Basic,
analog setting
3RT20 2 S0 contactors
5.5/7.5/11/15/18.5 kW
X
X
✓
✓
X
X
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
3RR22 Standard,
digital setting
✓ ✓
✓ ✓
✓ ✓
3RT20 3 S2 contactors
18.5/22/30/37 kW
X
X
X
X
✓
✓
SIRIUS 3UG4 / 3RR2 monitoring relay