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Technical data
11.2 Performance features
11.2.3
Equipment
Table 11- 3
Equipment on 3RU21 and 3RB30/3RB31 overload relays
Feature
RESET function
Remote RESET function
TEST function for auxiliary contacts
TEST function for electronics
Status display
Integrated auxiliary contacts:
1 NO contact
1 NC contact
Via a separate module.
1)
Only on the 3RB31 electrically with 24 V DC.
2)
11.2.4
Configuration of load feeders
Table 11- 4
Configuration of load feeders with 3RU21 and 3RB30/3RB31
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
106
Description
Enables manual or automatic resetting of the
•
relay
Enables remote resetting of the relay
•
Enables simple function testing and wiring
•
Allows checking of the electronics
•
Displays the current operating state
•
Can be used to output signals
•
Enable shutdown of the connected contactor
•
to protect the load
Description
Provides optimum protection of the loads and
•
operating personnel in the event of short
circuits due to insulation faults or faulty
switching operations
Simplifies configuration
•
Reduces connection outlay and costs
•
Enables stand-alone installation as well as
•
space-saving direct mounting
Enables fast connections
•
Ensures that connections are vibration-
•
resistant
Enables maintenance-free connections
•
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
3RU21
3RB30/3RB31
✓
✓
1)
✓
--
✓
✓
✓
3RU21
3RB30/3RB31
✓
✓
✓
Manual, 09/2014, A5E03656507420A/RS-AA/002
✓
✓
2)
✓
✓
✓
✓
✓
✓
✓
✓
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- 3Ru21 Thermal Overload Relays
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