SIMATIC – ET 200pro motor starter
GWA 4NEB 950 5661-02 DS 04
10-11
10.4 Current limits
Description
The motor current and current limits can be used to draw conclusions regarding
various system states:
10.4.1 Device parameters
Response to residual current violation
(can be parameterized for standard and high feature motor starters)
The residual current detection reacts when motor current becomes lower than
18.75% of the rated operating current in all 3 phases.
This device parameter configures how the motor starter responds to residual
current detection:
• Warning
• Tripping
Caution
When the motor is switched on, the zero current detector is suppressed for
approximately 1 second!
Response to current limit violation
(can only be parameterized for high feature motor starters)
This device parameter configures how the motor starter responds to a current
limit violation:
• Warning
• Tripping
System state Current value Protection by:
System becomes sluggish (e.g. due to
damaged bearings)
System runs more smoothly (e.g.
because there is no material left to pro-
cess).
Current is greater
or
less than normal
Current limits
System is blocked! Very high current
flowing
Blocking protection
Motor running at no-load e.g. due to
system damage!
Very low current
flowing
(< 18.75 % of I
e
)
Residual current
detection
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