7.6.2
Functionality
Negative sequence based overcurrent function (DNSPTOC, 46) may be used in power
line applications where the reverse zero sequence source is weak or open, the forward
source impedance is strong and it is desired to detect forward ground faults.
Additionally, it is applied in applications on cables, where zero sequence impedance
depends on the fault current return paths, but the cable negative sequence impedance is
practically constant.
The directional function is current and voltage polarized. The function can be set to
forward, reverse or non-directional independently for each step.
DNSPTOC (46) protects against all unbalanced faults including phase-to-phase faults.
The minimum pickup current of the function must be set to above the normal system
unbalance level in order to avoid unwanted tripping.
7.6.3
Function block
ANSI09000125-1-en.vsd
DNSPTOC (46)
I3P*
V3P*
BLOCK
BLKOC1
ENMLTOC1
BLKOC2
ENMLTOC2
TRIP
TROC1
TROC2
BFI_3P
PU_OC1
PU_OC2
DIROC1
DIROC2
CURRENT
VOLTAGE
VIANGLE
ANSI09000125 V1 EN
Figure 49:
DNSPTOC (46) function block
7.6.4
Signals
Table 59:
DNSPTOC (46) Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Three phase group signal for current inputs
V3P
GROUP
SIGNAL
-
Three phase group signal for voltage inputs
BLOCK
BOOLEAN
0
Block of function
BLKOC1
BOOLEAN
0
Block of over current function OC1
Table continues on next page
Section 7
1MRK 505 277-UUS C
Current protection
118
Technical Manual
Содержание REB650
Страница 1: ...Relion 650 series Busbar protection REB650 ANSI Technical Manual ...
Страница 2: ......
Страница 34: ...28 ...
Страница 52: ...46 ...
Страница 128: ...122 ...
Страница 150: ...144 ...
Страница 192: ...186 ...
Страница 222: ...216 ...
Страница 360: ...354 ...
Страница 378: ...372 ...
Страница 437: ...IEC12000585 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 431 Technical Manual ...
Страница 438: ...IEC12000586 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 432 Technical Manual ...
Страница 439: ...IEC12000587 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 433 Technical Manual ...
Страница 440: ...IEC12000588 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 434 Technical Manual ...
Страница 441: ...IEC12000589 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 435 Technical Manual ...
Страница 442: ...IEC12000590 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 436 Technical Manual ...
Страница 443: ...IEC12000591 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 437 Technical Manual ...
Страница 444: ...IEC12000592 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 438 Technical Manual ...
Страница 446: ...1MRK006502 MC 2 1 2 ANSI V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 440 Technical Manual ...
Страница 447: ...1MRK006502 MC 3 1 2 ANSI V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 441 Technical Manual ...
Страница 448: ...1MRK006502 MC 4 1 2 ANSI V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 442 Technical Manual ...
Страница 449: ...1MRK006502 MC 5 1 2 ANSI V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 443 Technical Manual ...
Страница 450: ...1MRK006502 MC 6 1 2 ANSI V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 444 Technical Manual ...
Страница 451: ...1MRK006502 MC 7 1 2 ANSI V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 445 Technical Manual ...
Страница 452: ...1MRK006502 MC 8 1 2 ANSI V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 446 Technical Manual ...
Страница 453: ...1MRK006502 MC 9 1 2 ANSI V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 447 Technical Manual ...
Страница 454: ...448 ...
Страница 503: ...497 ...