Functions
2.2 Overcurrent Protection 50, 51, 50N, 51N
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
62
Figure 2-12 Logic diagram of the 51 inverse-time overcurrent element for phases
If an ANSI Curve is configured, parameter 1209 51 TIME DIAL is used instead of parameter 1208 51 TIME
DIAL.
If parameter 1213 MANUAL CLOSE is set to 51 instant. and manual close detection is used, a pickup
causes instantaneous tripping even if theElement is blocked via a binary input.
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