Siemens SIPROTEC 4 7SD80 User Manual

Internal indication Display Output indication No.
50-2 PU B
50-1 PU B
50-3 PU B
51 PU B
Figure 2-26
5X-B Pickup ØB
7163
50-2 PU C
50-1 PU C
50-3 PU C
51 PU C
Figure 2-26
5X-B Pickup ØC
7164
50-2 PU N
50-1 PU N
50-3 PU N
51 PU N
Figure 2-26
5X-B Pickup Gnd
7165
50-1 PU A
50-1 PU B
50-1 PU C
50-1 PU N
Figure 2-26
Figure 2-26
Figure 2-26
Figure 2-26
50(N)-B2 PICKUP
7192
50-2 PU A
50-2 PU B
50-2 PU C
50-2 PU N
Figure 2-26
Figure 2-26
Figure 2-26
Figure 2-26
50(N)-B1 PICKUP
7191
50-3 PU A
50-3 PU B
50-3 PU C
50-3 PU N
50-3 PICKUP
7201
51 PU A
51 PU B
51 PU C
51 PU N
51(N)-B PICKUP
7193
(All pickups)
5X-B PICKUP
7161
The trip is signaled specifically for each phase-element, e.g. 50(N)-B2 TRIP .
i
i
NOTE
There is no indication for tripping of the grounding stages. If you need information link the internal pickup
signal with the OFF command of the stage, e.g, 50-1 PU N and 50(N)-B2 TRIP
Directional Overcurrent Protection
Measured Quantities
The phase currents are fed to the device via the input transformers of the measuring input. The ground
current 3I0 is calculated from the phase currents.
For the directional 67-1 elements, the used measuring voltage is determined by the fault type.
The current phase-to-ground voltage is used
•
for 1-phase or 3-phase faults
•
if the phase-to-ground voltage is > 4 V
•
not within the first 50 ms after short-circuit inception as the present voltage is disturbed by transients
during this time.
2.4.3
Functions
2.4 Backup overcurrent
76 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018

Siemens SIPROTEC 4 7SD80 Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7SD80
Category	Power distribution unit
Language	English