2.2 Overcurrent Protection 50, 51, 50N, 51N
74
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Figure 2-12
Reverse interlocking protection scheme
2.2.10 Setting Notes
General
When selecting the time overcurrent protection in DIGSI a dialog box appears with
several tabs, such as General, 50, 51, 50N, 51N and InrushRestraint for setting indi-
vidual parameters. Depending on the functional scope specified during configuration
of the protective functions in addresses
112
Charac. Phase
and
113
Charac.
Ground
the number of tabs can vary. If address
FCT 50/51
was set to
Definite
Time
, or
Charac. Ground
to =
Definite Time
, then only the settings for the def-
inite time elements are available. The selection of
TOC IEC
or
TOC ANSI
makes avail-
able additional inverse characteristics. The superimposed high-set elements 50-2 and
50N-2 are available in all these cases. Parameter
250
50/51 2-ph prot
can also
be set to activate two-phase overcurrent protection.
At address
1201
FCT 50/51
the phase time-overcurrent protection and at address
1301
FCT 50N/51N
the ground time-overcurrent protection may be switched
ON
or
OFF
.
Pickup values, time delays, and characteristics for ground protection are set separate-
ly from the pickup values, time delays and characteristic curves associated with phase
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 di-
rectional ground protection.
Summary of Contents for siprotec SJ62
Page 3: ...3 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 9: ...Preface 9 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 21: ...Contents 19 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 35: ...1 Introduction 33 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 365: ...2 Functions 363 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 529: ...4 Technical Data 527 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 699: ...A Appendix 697 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 701: ...Literature 699 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 714: ...Index 712 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...
Page 715: ...Index 713 SIPROTEC 4 7SJ62 63 64 Handbuch C53000 G1140 C147 A Edition 07 2015 ...