[7sj6x-ueberstromst-ie-20061212, 1, en_US]
Figure 2-9
Logic diagram for the 50N-1 overcurrent current element
If parameter 1313 MANUAL CLOSE is set to 50N-1 instant. and manual close detection is used, a pickup
causes instantaneous tripping even if the element is blocked via a binary input.
The same applies to 79 AR 50N-1 inst.
The dropout delay only operates when no inrush was detected. An incoming inrush resets an already running
dropout time delay.
[7sj6x_rueckfallverzoegerung_i_gr_erde_260803_he, 1, en_US]
Figure 2-10 Logic of the dropout delay for 50N-1
Inverse Time Overcurrent Elements 51, 51N
The inverse time overcurrent elements depend on the order variant. They always operate with an inverse time
characteristic according to IEC or ANSI standards, a user-defined characteristic, or a recloser characteristic. The
characteristic curves and associated formulas are shown in the Technical Data.
2.2.4
Functions
2.2 Overcurrent Protection 50, 51, 50N, 51N
74 SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
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