Technical data
11.2 Performance features
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
106
Manual, 09/2014, A5E03656507420A/RS-AA/002
11.2.3
Equipment
Table 11- 3 Equipment on 3RU21 and 3RB30/3RB31 overload relays
Feature
Description
3RU21
3RB30/3RB31
RESET function
•
Enables manual or automatic resetting of the
relay
✓
✓
Remote RESET function
•
Enables remote resetting of the relay
✓
1)
✓
2)
TEST function for auxiliary contacts
•
Enables simple function testing and wiring
✓
✓
TEST function for electronics
•
Allows checking of the electronics
--
✓
Status display
•
Displays the current operating state
✓
✓
Integrated auxiliary contacts:
1 NO contact
•
Can be used to output signals
✓
✓
1 NC contact
•
Enable shutdown of the connected contactor
to protect the load
✓
✓
1)
Via a separate module.
2)
Only on the 3RB31 electrically with 24 V DC.
11.2.4
Configuration of load feeders
Table 11- 4 Configuration of load feeders with 3RU21 and 3RB30/3RB31
Feature
Description
3RU21
3RB30/3RB31
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 installation as well as
space-saving direct mounting
✓
✓
Spring-loaded connection system
•
Enables fast connections
•
Ensures that connections are vibration-
resistant
•
Enables maintenance-free connections
✓
✓
