Siemens SIRIUS 3RU - Equipment

Technical data
11.3 Performance features
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
150 Manual, 09/2016, A5E03656507420A/RS-AB/003
11.3.3
Equipment
Table 11- 3 Features of 3RU21, 3RB20 / 3RB21 and 3RB30 / 3RB31 overload relays
Feature
Description
3RU21
3RB30 /
3RB31
3RB20 /
3RB21
RESET function
• Enables manual or automatic resetting of
the relay
✓ ✓ ✓
Remote RESET function
• Enables remote resetting of the relay
✓
1)
✓
2)
✓
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 3RB21 / 3RB31 electrically with 24 V DC.