[selektivitaetdurchrueckwverr-260602-kn, 1, en_US]
Figure 2-33
Reverse interlocking using directional elements
The directional overcurrent element providing normal time grading operates as selective backup protection.
The following figure shows the logic diagram for the generation of fault direction signals.
[7sj6x-meld-gener-fehlerricht-20060118, 1, en_US]
Figure 2-34
Logic diagram for the generation of fault direction signals
Setting Notes
General
When selecting the directional time overcurrent protection in DIGSI, a dialog box appears with several tabs for
setting the associated parameters. Depending on the functional scope specified during configuration of the
protective functions in addresses 115
67/67-TOC
and 116
67N/67N-TOC
, the number of tabs can vary.
If
67/67-TOC
or
67N/67N-TOC
is set equal to
Definite Time
, only the parameters for definite time over-
current protection are accessible here. If you select
TOC IEC
or
TOC ANSI
, the inverse time characteristics is
available, too. The superimposed directional elements 67-3, 67-2 and 67-1or 67N-3, 67N-2 and 67N-1apply in
all these cases.
At address 1501
FCT 67/67-TOC
, directional phase overcurrent protection may be switched
ON
or
OFF
.
Pickup values, time delays, and characteristic are set separately for phase protection and ground protection.
Because of this, relay coordination for ground faults is independent of relay coordination for phase faults, and
more sensitive settings can often be applied to directional ground protection. Thus, at address 1601
FCT
67N/67N-TOC
, directional ground time overcurrent protection may be switched
ON
or
OFF
independent of
the directional phase time overcurrent protection.
2.3.10
Functions
2.3 Directional Overcurrent Protection 67, 67N
98
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
Page 8: ...8 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...
Page 18: ...18 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...
Page 30: ...30 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...
Page 540: ...540 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...
Page 594: ...594 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...
Page 720: ...720 SIPROTEC 4 7SJ62 64 Manual C53000 G1140 C207 8 Edition 08 2016 ...