Protection Function - Siemens SIRIUS 3RU2 Manual

11.4.2.6

Protection function

Technical data for protection function, 3RB303./3RB313. overload relays
Product function
overload protection
•
overload warning
•
phase disturbance recognition
•
short-circuit to earth recognition
•
Design of the overload circuit breaker
Trip class
Product function
overload protection
•
overload warning
•
phase disturbance recognition
•
short-circuit to earth recognition
•
Design of the overload circuit breaker
Trip class
Type of ground fault protection
Current response value of the ground fault
protection minimum
Working range of the ground fault protection
relative to current setting value
•
Response time of the ground fault protection in
settled state
Operating voltage for remote-reset function for DC
Reset current for remote-reset function
maximum
•
– note
typical
•
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
11.4 3RB30/3RB31 solid-state overload relays
3RB303.-1...
Yes
No
Yes
No
electronic
CLASS 10E
3RB313.-4...
Yes
No
Yes
Yes
electronic
CLASS 5E, 10E, 20E and 30E adjustable
Sinusoidal fault currents at 50 / 60 Hz
0,75 x IMotor
Lower current setting value < IMotor
Upper current setting value x 3.5 > IMotor
s 1
V 24
A 0.2
Current only flows for 20 ms
A —
Technical data
3RB303.-2...
CLASS 20E
137