[dw_ocp_ad with Filter2.vsd, 1, en_US]
Figure 7-58
Structure/Embedding of the Function Overcurrent Protection, Phases – Advanced
[dwocpbp1-210113-01.tif, 3, en_US]
Figure 7-59
Structure/Embedding the Function Overcurrent Protection, Phases – Basic
If the device-internal functions listed in the following 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).
Filter for RMS Value Gain
Description
The function block Filter can be used to adapt the RMS value for 2 means:
•
To gain harmonics in a defined way. Higher harmonics can stress the protected object thermally more
than lower harmonics. This is the case for reactors applied in AC filters. In addition, the amplitude attenu-
ation of higher frequencies due to the anti-aliasing filter of the device is automatically compensated by
the filter
•
To only compensate the amplitude attenuation of higher frequencies due to the anti-aliasing filter
7.4.3
7.4.3.1
Protection and Automation Functions
7.4 Overcurrent Protection, Phases
SIPROTEC 5, High-Voltage Bay Controller, Manual
599
C53000-G5040-C015-9, Edition 11.2017
Summary of Contents for 6MD85
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