Limits Of Fault Current Measurement - Siemens SIMOCODE pro Operating Manual

4.3.1.2

Limits of fault current measurement

In the event of increasing primary currents, imbalances in the cable routing and current loads
in individual cables increasingly cause what appear to be residual currents that are detected
by the evaluation units. Spurious tripping may therefore occur if excessively low monitoring
limit values have been set at high primary currents. Because of these tolerances in the
configuration, the measuring accuracy no longer corresponds to the stated range of ±7.5 %.
To avoid spurious tripping, we recommend setting the limit values to the minimum values
listed in the following graphic, depending on the applicable primary current.
SIMOCODE pro - Parameterize
Operating Manual, 04/2017, A5E40507630002A/RS-AA/001
Parameters
4.3 Monitoring functions
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