based on the set system frequency.
DFTReference
set to
DFTRefGrpX
uses DFT
reference from the selected group block, when own group selected adaptive DFT
reference will be used based on the calculated signal frequency from own group.
DFTReference
set to
External DFT Ref
will use reference based on input signal
DFTSPFC
.
Settings
DFTRefExtOut
and
DFTReference
shall be set to default value
InternalDFTRef
if no VT inputs are available. However, if it is
necessary to use frequency adaptive DFT (
DFTReference
set to other
than default, referring current measuring SMAI) when no voltages are
available, note that the
MinValFreqMeas
setting is still set in reference
to
VBase
(of the selected GBASVAL group). This means that the
minimum level for the current amplitude is based on
VBase
. For
example, if
VBase
is 20000, the resulting minimum amplitude for
current is 20000 * 10% = 2000.
MinValFreqMeas
: The minimum value of the voltage for which the frequency is
calculated, expressed as percent of the voltage in the selected Global Base voltage
group (GBASVAL:n, where 1<n<6).
Below example shows a situation with adaptive frequency tracking with one reference
selected for all instances. In practice each instance can be adapted to the needs of the
actual application.
1MRK 505 277-UUS C
Section 15
Basic IED functions
405
Technical Manual
Summary of Contents for REB650
Page 1: ...Relion 650 series Busbar protection REB650 ANSI Technical Manual ...
Page 2: ......
Page 34: ...28 ...
Page 52: ...46 ...
Page 128: ...122 ...
Page 150: ...144 ...
Page 192: ...186 ...
Page 222: ...216 ...
Page 360: ...354 ...
Page 378: ...372 ...
Page 437: ...IEC12000585 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 431 Technical Manual ...
Page 438: ...IEC12000586 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 432 Technical Manual ...
Page 439: ...IEC12000587 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 433 Technical Manual ...
Page 440: ...IEC12000588 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 434 Technical Manual ...
Page 441: ...IEC12000589 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 435 Technical Manual ...
Page 442: ...IEC12000590 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 436 Technical Manual ...
Page 443: ...IEC12000591 V1 EN 1MRK 505 277 UUS C Section 16 IED physical connections 437 Technical Manual ...
Page 444: ...IEC12000592 V1 EN Section 16 1MRK 505 277 UUS C IED physical connections 438 Technical Manual ...
Page 454: ...448 ...
Page 503: ...497 ...