Transformer Differential Protection, Two Winding T2Wpdif; Identification; Function Block; Signals - ABB RET650 Technical Manual

Section 6
Differential protection
6.1.2
6.1.2.1
6.1.2.2
6.1.2.3
80
Stabilization is included for inrush and overexcitation currents respectively, cross-
blocking is also available. Adaptive stabilization is also included for system recovery
inrush and CT saturation during external faults. A high set unrestrained differential
current protection element is included for a very high speed tripping at a high internal
fault currents.
Included is an innovative sensitive differential protection element based on the theory
of symmetrical components. This element offers the best possible coverage of power
transformer windings turn to turn faults.

Transformer differential protection, two winding T2WPDIF

Identification

Function description
Transformer differential protection, two-
winding

Function block

T2WPDIF
I3PW1CT1* TRIP
I3PW2CT1* TRIPRES
BLOCK TRIPUNRE
TRNSUNR
TRNSSENS
START
STL1
STL2
STL3
BLK2H
BLK5H
BLKWAV
IDALARM
IDL1MAG
IDL2MAG
IDL3MAG
IBIAS
IDNSMAG
IEC09000274_1_en.vsd
IEC09000274 V1 EN
Figure 30: T2WPDIF function block

Signals

Table 24: T2WPDIF Input signals
Name Type
I3PW1CT1 GROUP
SIGNAL
I3PW2CT1 GROUP
SIGNAL
BLOCK BOOLEAN
IEC 61850 IEC 60617
identification identification
T2WPDIF
3Id/I
SYMBOL-BB V1 EN
Default Description
- Three phase current connection winding 1 (W1)
CT1
- Three phase current connection winding 2 (W2)
CT1
0 Block of function
1MRK 504 135-UEN A
ANSI/IEEE C37.2
device number
87T
Technical manual