Siemens 7SC80 Manual page 154

Functions
2.4 Dynamic Cold Load Pickup
function is ready. To initiate the cold load pickup, the automatic reclosing function provides the internal signal
"79M Auto Reclosing ready". It is always active when automatic reclosing is available, activated, not blocked
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 Overcurrent Protection, Phases
The dynamic pickup thresholds for the phase currents of the overcurrent protection are set at the following
addresses:
50c-1 PICKUP
50c-2 PICKUP
50c-3 PICKUP
51c PICKUP
51c-1 PICKUP
The trip times for the phase currents of the overcurrent protection are set at the following addresses:
50c-1 DELAY
50c-2 DELAY
50c-3 DELAY
51c TIME DIAL
51c TIME DIAL
51c TIME DIAL
51c-1 TIME DIAL Address 1815 for setting value all curves
The characteristics for the phase currents of the overcurrent protection and their possible settings are entered
at addresses:
1811 51c IEC Curve
1812 51c ANSI Curve
1813 51c Recloser
1817 51c-1 IEC Cur.
1819 51c-1 ANSI Cur.
1820 51c-1 Rec. Cur.
At address 1810 51c Drop-out or 1816 51c-1 Drop-out, you can set the dropout behavior Disk
Emulation or Instantaneous for the phase currents of the overcurrent protection.
154
Address 1803
Address 1801
Address 1808
Address 1805
Address 1814
Address 1804
Address 1802
Address 1809
Address 1806 for IEC and user-defined characteristics
Address 1806 for recloser characteristics. The parameter must cover an extended
setting range by the bandwidth of the recloser characteristic
Address 1807 for ANSI characteristic
Normal Inverse, Very Inverse, Extremely Inv., Long
Inverse
Very Inverse, Inverse, Short Inverse, Long Inverse,
Moderately Inv., Extremely Inv., Definite Inv.
Curve A (101), Curve B (117), Curve C (133), Curve D
(116), Curve E (132), Curve K (162), Curve N (104), Curve
R (105), Curve W (138), Curve 2 (135), Curve 3 (140),
Curve 8 (113), Curve 8* (111), Curve 9 (131), Curve 11
(141)
Normal Inverse, Very Inverse, Extremely Inv., Long
Inverse
Very Inverse, Inverse, Short Inverse, Long Inverse,
Moderately Inv., Extremely Inv., Definite Inv.
Curve A (101), Curve B (117), Curve C (133), Curve D
(116), Curve E (132), Curve K (162), Curve N (104), Curve
R (105), Curve W (138), Curve 2 (135), Curve 3 (140),
Curve 8 (113), Curve 8* (111), Curve 9 (131), Curve 11
(141)
2.14.6 Setting Notes).
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017