Siemens SIRIUS 3RU2 - Equipment

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
✓ ✓