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Protection and Automation Functions
7.4 Overcurrent Protection, Phases
Figure
7-72). Depending on other functions, the stage can also be blocked dynamically. This functionality is
only available in function type Advanced.
[loocp3dpa-030311-01.vsd, 2, en_US]
Figure 7-72
If available in the device, the following functionalities can affect the overcurrent-protection stages:
Functionalities
Automatic reclosing (AREC)
Cold-load pickup detection
Binary input signal
These functionalities generate signals that change the settings of the dynamic settings of the overcurrent-
protection stage or block it, if required. In the latter case, the settings of the Threshold and Operate
delay parameters are of no relevance. Within the overcurrent-protection stage, each of these signals is
provided with a configuration parameter Influence of function ... and its own dynamic settings
(Operate delay and Threshold). The configuration settings are used to set whether the signal shall be
active or not, this means whether the dynamic settings shall be activated or not. If one of these signals (for
630
Principle of the Dynamic Settings Exemplified by 1st Definite-Time Overcurrent Protection
Stage
Priority
Priority 1
Priority 2
Priority 3
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
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