Siemens siprotec 7SD5 User Manual

2 Functions
274
7SD5 Manual
C53000-G1176-C169-1
Switching onto a
Fault
To perform an instantaneous trip when the circuit breaker is manually closed onto a
dead fault, the manual closing command of the control discrepancy switch can be fed
to the device via a binary input. The overcurrent protection can then trip three-pole
without delay or with a reduced delay. It can be determined via parameter setting for
which stage(s) the rapid tripping following manually closure on to a dead fault applies
(refer also to the logic Figures 2-117, 2-118 and 2-119).
Pickup and Trip-
ping Logic
The pickup signals of the individual phases (or the earth) and of the stages are linked
in such a way that both the phase information and the stage which has picked up are
indicated (Table 2-12).
In case of trip signals, the stage which resulted in the trip command is also indicated.
For single-pole tripping, the pole is identified (see also Section 2.23.1 „Pickup Logic of
the Entire Device“).
Table 2-12 Pickup signals of the single phases
Internal Indication Display Output Indication No.
I>> PU L1
I> PU L1
Ip PU L1
I>>> PU L1
2-117
2-118
2-119
„O/C Pickup L1“ 7162
I>> PU L2
I> PU L2
Ip PU L2
I>>> PU L2
2-117
2-118
2-119
„O/C Pickup L2“ 7163
I>> PU L3
I> PU L3
Ip PU L3
I>>> PU L3
2-117
2-118
2-119
„O/C Pickup L3“ 7164
I>> PU E
I> PU E
Ip PU E
I>>> PU E
2-117
2-118
2-119
„O/C Pickup E“ 7165
I>> PU L1
I>> PU L2
I>> PU L3
I>> PU E
2-117
2-117
2-117
2-117
„O/C PICKUP I>>“ 7191
I> PU L1
I> PU L2
I> PU L3
I> PU E
„O/C PICKUP I>“ 7192
Ip PU L1
Ip PU L2
Ip PU L3
Ip PU E
2-118
2-118
2-118
2-118
„O/C PICKUP Ip“ 7193
I>>> PU L1
I>>> PU L2
I>>> PU L3
I>>> PU E
2-119
2-119
2-119
2-119
„I-STUB PICKUP“ 7201
(All pickups) „O/C PICKUP“ 7161
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English