Siemens SIPROTEC 7SD610 User Manual

Functions
2.9 Backup Time Overcurrent Protection
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
111
Instantaneous tripping before automatic reclosure
If automatic reclosure is to be carried out, quick fault clearance before reclosure is usually desirable. A release
signal from an external automatic reclosure device can be injected via binary input „>O/C InstTRIP“. The
interconnection of the internal automatic reclose function is performed via an additional CFC logic, which typi-
cally connects the output signal 2889 „AR 1.CycZoneRel“ with the input signal „>O/C InstTRIP“. Any
stage of the overcurrent protection can thus perform an instantaneous trip before reclosure via the parameter
Telep / BI ....
Switching onto a fault
The internal line energization detection can be used to achieve quick tripping of the circuit breaker in case of
an earth fault. The time 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 instantaneous tripping following energization
applies (refer also to the logic diagrams Figure 2-39, 2-42 and 2-40). This function is independent of the high-
current instantaneous tripping described in Subsection 2.8.
Pickup logic and tripping logic
The pickup signals of the single phases (or earth) and of the individual stages are thus linked with each other
that both the phase information and the stage that has picked up is indicated (Table 2-3).
Table 2-3 Pickup signals of the single phases
Internal indication Display Output indication No
I>> PU L1
I> PU L1
I>>> PU L1
I> ger PU L1
Ip PU L1
Ip ger PU L1
2-39
2-40
2-41
2-42
2-43
„O/C Pickup L1“ 7162
I>> PU L2
I> PU L2
I>>> PU L2
I> ger PU L2
Ip PU L2
Ip ger PU L2
2-39
2-40
2-41
2-42
2-43
„O/C Pickup L2“ 7163
I>> PU L3
I> PU L3
I>>> PU L3
I> ger PU L3
Ip PU L3
Ip ger PU L3
2-39
2-40
2-41
2-42
2-43
„O/C Pickup L3“ 7164
I>> PU E
I> PU E
I>>> PU E
I> ger PU E
Ip PU E
Ip ger PU E
2-39
2-40
2-41
2-42
2-43
„O/C Pickup E“ 7165
I>> PU L1
I>> PU L2
I>> PU L3
I>> PU E
2-39
2-39
2-39
2-39
„O/C PICKUP I>>“ 7191
I> PU L1
I> PU L2
I> PU L3
I> PU E
„O/C PICKUP I>“ 7192

Siemens SIPROTEC 7SD610 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SD610
Category	Relays
Language	English