Siemens 7SC80 - Page 155

Non-directional Overcurrent Protection, ground
The dynamic pickup thresholds for the ground currents of the overcurrent protection are set at the following
addresses:
50Nc-1 PICKUP
Address 1903
50Nc-2 PICKUP
Address 1901
50Nc-3 PICKUP
Address 1908
51Nc PICKUP
Address 1905
51Nc-1 PICKUP
Address 1914
The tripping times for the ground currents of the overcurrent protection are set at the following addresses:
50Nc-1 DELAY
Address 1904
50Nc-2 DELAY
Address 1902
50Nc-3 DELAY
Address 1909
51Nc T-DIAL
Address 1906 for IEC and user-defined characteristics
51Nc T-DIAL
Address 1906 for recloser characteristics. The parameter must cover an extended
setting range by the bandwidth of the recloser characteristic
51Nc T-DIAL
Address 1907 for ANSI characteristics
51Nc-1 T-DIAL
Address 1915 for setting value all curves
The characteristics for the ground currents of the overcurrent protection and their possible settings are
entered at addresses:
1911
51c IEC Curve Normal Inverse, Very Inverse, Extremely Inv., Long
Inverse
1912 51c ANSI Curve Very Inverse, Inverse, Short Inverse, Long Inverse,
Moderately Inv., Extremely Inv., Definite Inv.
1913 51Nc Recloser 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)
1917 51Nc-1 IEC Cu. Normal Inverse, Very Inverse, Extremely Inv., Long
Inverse
1919 51Nc-1 ANSI Cu. Very Inverse, Inverse, Short Inverse, Long Inverse,
Moderately Inv., Extremely Inv., Definite Inv.
1920 51Nc-1 Rec. Cu. 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)
At address 1910 51c Drop-out or 1916 51Nc-1 Drop-out, you can set the dropout behavior Disk
Emulation or Instantaneous for the ground currents of the overcurrent protection.
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
Address 2003
50c-2 PICKUP
Address 2001
67c-3 PICKUP
Address 2008
51c PICKUP
Address 2005
67c-TOC-1 PU
Address 2014
Functions
2.4 Dynamic Cold Load Pickup
SIPROTEC Compact, 7SC80, Manual 155
E50417-G1140-C486-A8, Edition 07.2017