Siemens SIRIUS 3RU2 - Protection Function

Technical data
11.4 3RB30/3RB31 solid-state overload relays
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
137
11.4.2.6
Protection function
Technical data for protection function, 3RB303./3RB313. overload relays
3RB303.-1...
3RB303.-2...
Product function
• overload protection
Yes
• overload warning
No
• phase disturbance recognition
Yes
• short-circuit to earth recognition
No
Design of the overload circuit breaker
electronic
Trip class
CLASS 10E CLASS 20E
3RB313.-4...
Product function
• overload protection
Yes
• overload warning
No
• phase disturbance recognition
Yes
• short-circuit to earth recognition
Yes
Design of the overload circuit breaker
electronic
Trip class
CLASS 5E, 10E, 20E and 30E adjustable
Type of ground fault protection
Sinusoidal fault currents at 50 / 60 Hz
Current response value
of the ground fault
protection
minimum
0,75 x IMotor
Working range of the ground fault protection
• relative to current setting value
Lower current setting value < IMotor
Upper current setting value x 3.5 > IMotor
Response time
of the ground fault protection
in
settled state
s
1
Operating voltage
for remote-reset function
for DC
V 24
Reset current
for remote-reset function
• maximum
A
0.2
– note
Current only flows for 20 ms
• typical
A
—