Blocking Time And Blocking Current - Siemens SIMATIC ET 200SP Manual

Product overview
3.7 Functions
Setting ranges
The table below shows the possible setting range for the lower and upper current warning
limits:
Device parameters
Lower current limit
Upper current limit
3.7.7.4

Blocking time and blocking current

The blocking current specifies how much current is consumed by the motor (at rated voltage)
when the drive is blocked.
If the motor current exceeds the parameterized value for the blocking current, the motor
starter detects a blockage. Blocking time monitoring is activated from the point where the
blocking current is exceeded. If the blocking current flows for longer than the parameterized
blocking time, the motor starter automatically generates a trip command.
The blocking current and blocking time can be parameterized. The run-up time corresponds
to the parameterized blocking time after switching on the motor.
Blocking protection in run-up phase
If the motor current exceeds the parameterized value for the blocking current, the motor
starter detects a blockage.
● Blocking time monitoring is activated from the point where the blocking current is
exceeded.
● If the blocking current flows for longer than the parameterized blocking time, the motor
starter automatically generates a trip command.
You can parameterize the response threshold of the blocking current and the blocking time
up to tripping so that starting the motor does not lead to erroneous tripping due to motor
blocking.
56
Default setting
Deactivated
Deactivated
Manual, 12/2016, A5E34821005002A/RS-AB/002
Setting range
18.75 ... 100 % of I
•
e
0 % (= deactivated)
•
Increment: 3.125 %
50 to 400 % of I
•
e
0 % (= deactivated)
•
Increment: 3.125 %
Motor starter (3RK1308-0**00-0CP0)