Siemens SIRIUS 3RF Series

SIRIUS 3RR2 current monitoring relays
8.10 Technical data
SIRIUS Innovations
736 System Manual, 01/2011, A8E56203870002-03
8.10.1.4 Configuration of load feeders
Table 8- 17 Load feeders with 3RR2 current monitoring relays
Feature Benefit 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
personnel in the event of short
circuits due to insulation faults
or faulty switching operations
✓ ✓
Electrical and mechanical matching to
3RT2 contactors
 Simplifies configuration
 Reduces connection outlay
and costs
 Enables stand-alone assembly
as well as space-saving direct
mounting
✓ ✓
Spring-loaded connection system for
main circuit
 Enables fast connections
 Ensures that connections are
vibration-resistant
 Enables maintenance-free
connections
✓ (optional) ✓ (optional)
Spring-loaded connection system for
auxiliary circuits
 Enables fast connections
 Ensures that connections are
vibration-resistant
 Enables maintenance-free
connections
✓ (optional) ✓ (optional)