ABB Relion 670 series - Differential Protection; Functionality; Identification; Transformer Differential Protection T2 WPDIF and T3 WPDIF (87 T)

Section 6 Differential protection
6.1 Transformer differential protection T2WPDIF and
T3WPDIF (87T)
IP14639-1 v3
6.1.1 Identification
M15074-1 v5
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-US
87T
Transformer differential protection,
three-winding
T3WPDIF
3Id/I
SYMBOL-BB V1 EN-US
87T
6.1.2 Functionality
M16104-3 v16
The Transformer differential protection is provided with internal CT ratio matching, phase shift
compensation and settable zero sequence current elimination.
The function can be provided with up to six three-phase sets of current inputs if enough HW is
available. 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_ansi.vsd
152
352
ANSI05000048 V1 EN-US
two-winding power transformer
xx05000049_ansi.vsd
152
352
ANSI05000049 V1 EN-US
Table continues on next page
1MRK 502 066-UUS B Section 6
Differential protection
105
Technical manual