Settings - Siemens SIPROTEC 4 User Manual

Functions
2.4 Dynamic Cold Load Pickup
initiate the cold load pickup, the automatic reclosing function provides the internal signal "79M Auto
Reclosing ready". It is always active when the automatic reclosing function is available, activated, unblocked,
and ready for a further cycle (see also margin heading "Controlling Directional/Non-Directional Overcurrent
Protection Elements via Cold Load Pickup" in Section
Time Delays
There are no specific procedures on how to set the time delays at addresses 1703 CB Open Time, 1704
Active Time and 1705 Stop Time. These time delays must be based on the specific loading characteristics
of the equipment being protected, and should be set to allow for brief overloads associated with dynamic cold
load conditions.
Non-Directional 50/51 Elements (phases)
The dynamic pickup values and tripping times associated with the time overcurrent protection functions are
set at address block 18 for the phase currents:
The dynamic pickup and delay settings for the high-set elements are set at addresses 1801 50c-2 PICKUP or
1808 50c-3 PICKUP and 1802 50c-2 DELAY or 1809 50c-3 DELAY respectively; the dynamic pickup and
delay settings for the 67N-1 element are set at addresses 1803 50c-1 PICKUP and 1804 50c-1 DELAY
respectively; and the pickup, time multiplier (for IEC curves or user-defined curves), and time dial (for ANSI
curves) settings for the 67N-TOC element are set at addresses 1805 51c PICKUP, 1806 51c TIME DIAL
and 1807 51c TIME DIAL respectively.
Non-Directional 50N/51N Elements (ground)
The dynamic pickup values and time delays associated with non-directional time overcurrent ground protec-
tion are set at address block 19:
The dynamic pickup and delay settings for the high-set elements are set at addresses 1901 50Nc-2 PICKUP
or 1908 50Nc-3 PICKUP and 1902 50Nc-2 DELAY or 1909 50Nc-3 DELAY respectively; the dynamic
pickup and delay settings for the 67N-1 element are set at addresses 1903 50Nc-1 PICKUP and 1904
50Nc-1 DELAY respectively; and the pickup, time multiplier (for IEC curves or user-defined curves), and time
dial (for ANSI curves) settings for the 67N-TOC element are set at addresses 1905 51Nc PICKUP, 1906 51Nc
T-DIAL and 1907 51Nc T-DIAL respectively.
Directional 67/67–TOC Elements (phases)
The dynamic pickup values and time delays associated with directional overcurrent phase protection are set at
address block 20
Addresses 2001 67c-2 PICKUP or 2008 67c-3 PICKUP and 2002 67c-2 DELAY or 2009 67c-3 DELAY
define the dynamic parameters for the high-current elements, 2003 67c-1 PICKUP and 2004 67c-1
DELAY for the directional definite time overcurrent element and 2005 67c-TOC PICKUP in combination with
2006 67c-TOC T-DIAL (for IEC characteristics or user-defined characteristics) or 2006 67c-TOC T-DIAL
(for ANSI characteristics) for the directional inverse time overcurrent protection element.
Directional 67/67N Elements (ground)
The dynamic pickup values and time delays associated with directional overcurrent ground protection are set
at address block 21:
Addresses 2101 67Nc-2 PICKUP or 2108 67Nc-3 PICKUP and 2102 67Nc-2 DELAY or 2109 67Nc-3
DELAY define the dynamic parameters for the high-current elements, 2103 67Nc-1 PICKUP and 2104
67Nc-1 DELAY for the directional definite time overcurrent element and 2105 67Nc-TOC PICKUP in combi-
nation with 2106 67Nc-TOC T-DIAL (for IEC characteristics or user-defined characteristics) or 2107 67Nc-
TOC T-DIAL (for ANSI characteristics) for the directional inverse time overcurrent protection element.
2.4.3

Settings

The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
114
2.16.6 Setting Notes).
C53000-G1140-C207-8, Edition 08.2016
SIPROTEC 4, 7SJ62/64, Manual