Siemens 6MD86 - General Functionality; Description

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Figure 7-76 Structure/Embedding the Function Overcurrent Protection, Ground – Advanced
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Figure 7-77 Structure/Embedding the Function Overcurrent Protection, Ground – Basic
If the following listed, device-internal functions are present in the device, these functions can influence the
pickup values and tripping delays of the stages or block the stages. The stage can also be affected by an
external source via a binary input signal.
•
Automatic reclosing (AREC)
•
Cold-load pickup detection
•
Binary input signal
If the device is equipped with an Inrush-current detection function, the stages can be stabilized against trip-
ping due to transformer-inrush currents (available in both function types).
General Functionality
Description
Measured-Value Selection
The function provides the option to select between the values IN measured or 3I0 calculated.
7.5.3
7.5.3.1
Protection and Automation Functions
7.5 Overcurrent Protection, Ground
SIPROTEC 5, High-Voltage Bay Controller, Manual 635
C53000-G5040-C015-9, Edition 11.2017