ABB REG670 - Functionality; Identification; Transformer Differential Protection T2 WPDIF and T3 WPDIF

Section 6 Differential protection
6.1 Transformer differential protection T2WPDIF and
T3WPDIF
6.1.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Transformer differential protection, two-
winding
T2WPDIF
3Id/I
SYMBOL-BB V1 EN
87T
Transformer differential protection,
three-winding
T3WPDIF
3Id/I
SYMBOL-BB V1 EN
87T
6.1.2 Functionality
The Transformer differential protection, two-winding T2WPDIF and Transformer
differential protection, three-winding T3WPDIF are provided with internal CT ratio
matching, vector group compensation and settable zero sequence current elimination.
The function can be provided with up to six three-phase sets of current inputs. All
current inputs are provided with percentage bias restraint features, making the IED
suitable for two- or three-winding transformer in multi-breaker station arrangements.
Two-winding applications
xx05000048.vsd
IEC05000048 V1 EN
two-winding power
transformer
xx05000049.vsd
IEC05000049 V1 EN
two-winding power
transformer with
unconnected delta
tertiary winding
Table continues on next page
1MRK502052-UEN B Section 6
Differential protection
101
Technical manual