Siemens SITRANS P DS III Operating Instructions Manual page 139

Example
The configured saturation limits in the following figures are 3.8 mA and 20.5 mA.
Example 1: the response time starts at t
limit of 20.5 mA for the first time. At t
interrupt is triggered. Time t
immediately revoked even if the current then drops below the saturation limit again.
Example 2: the duration of the current saturation is shorter than the response time (t
that case, the device does not go into "fault current" state.
Example 3: the current drops below the lower saturation limit only for a short time. The fault
current is not switched off until after the end of the stop time (t
corresponds to the "Saturated interrupt value" setting. The fault current is output in the
direction of current saturation.
Example 4: the current drops below the lower saturation limit only for a short time. The fault
current is not switched off until after the end of the stop time (t
corresponds to the "Active upper interrupt value" setting. The upper fault current is outputted
although the direction of current saturation is downward.
Figure 7-17 Four examples of saturation monitoring
See also
Fault current (Page 124)
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09
. At t , current reaches the configured saturation
1 1
, the response time ends. The stop time begins and the
2
is the configured end of the stop time. At t
3
Operating functions through HART
7.21 Diagnostic functions
, the interrupt is
3
). The direction of fault current
3
). The direction of fault current
3
, t ). In
1 2
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