2 Functions
103
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
The directional overcurrent element providing normal time grading operates as selec-
tive backup protection.
The following figure shows the logic diagram for the generation of fault direction sig-
nals.
Figure 2-29
Logic diagram for the generation of fault direction signals.
2.3.10 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
=
Definite Time
is selected, then only the settings
for the definite time elements are available. If
TOC IEC
or
TOC ANSI
is selected, the
inverse characteristics are also available. The superimposed directional elements 67-
2 and 67-1 or 67N-2 and 67N-1 apply 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 indepen-
dent 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
indepen-
dent of the directional phase time overcurrent protection.
Depending on the parameter
613
Gnd O/Cprot. w.
, the device can either operate
using measured values
I
N or the quantities 3
I
0 calculated from the three phase cur-
rents. Devices featuring a sensitive ground current input generally use the calculated
quantity 3
I
0.
The direction determination of the function is affected by parameter
201
CT
Starpoint
(see chapter 2.1.3).
Содержание siprotec SJ62
Страница 3: ...3 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 9: ...Preface 9 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 21: ...Contents 19 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 35: ...1 Introduction 33 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 365: ...2 Functions 363 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 443: ...3 Mounting and Commissioning 441 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 529: ...4 Technical Data 527 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 699: ...A Appendix 697 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 701: ...Literature 699 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 714: ...Index 712 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Страница 715: ...Index 713 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...