Calculating Settings For Global Base Values Gbasval; Calculating Settings For Transformer Differential Protection T2Wpdif - ABB Relion 650 Series Applications Manual

1MRK 504 124-UEN B
5.3.
6. Set the voltage transformer inputs 9 and 10.
6.1.
6.2. Set
6.3. Set
6.4. Set
3.1.2

Calculating settings for global base values GBASVAL

Each function uses primary base values for reference of settings. The base values are defined
in Global base values for setting GBASVAL function. It is possible to include up to six Global
base values for settings functions. In this application GBASVAL instance 1 is used to define the
base for 145 kV inputs and GBASVAL instance 2 for 22 kV inputs.
For transformer protection it is recommended to set the base parameters according to the
power transformer primary rated values:
1. Set Global Base 1
1.1.
1.2.
1.3.
2. Set Global Base 2
2.1.
2.2.
2.3.
3.1.3 Calculating settings for transformer differential protection
T2WPDIF
1. Set
2. Set
Transformer protection RET650
Application manual
(The rated secondary current of the CT)
Set CTPrim7 to 300 A
(The rated primary current of the CT)
Current input 8 is intended for connection of low voltage side CT. In this
application the input is not used.
Set VTSec9 to 110 V
(The rated secondary voltage of the VT, given as phase-phase voltage)
VTPrim9 to 22 kV
(The rated secondary voltage of the VT, given as phase-phase voltage)
VTSec10 to 110 V/√3
(The rated secondary voltage of the VT, given as phase-phase voltage)
VTPrim10 to 22 kV
(The rated secondary voltage of the VT, given as phase-phase voltage)
IBase to 239 A
Set
UBase to 145 kV
Set
SBase to 60 MVA ( SBase =√3· UBase · IBase )
Set
IBase to 1575 A
Set
UBase to 22 kV
Set
SBase to 60 MVA ( SBase =√3· UBase · IBase )
Set
GlobalBaseSel setting in a protection and control function references a
The
Global base values for setting function for reference of primary values.
GlobalBaseSelW1 to 1 (HV)
GlobalBaseSelW2 to 2 (LV)
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Section 3
RET650 setting examples
GUID-D3D7AF80-44D4-4481-93EC-6D65C82A9604 v2
GUID-AA4F92CD-2110-48AB-8072-2B374841BB46 v2
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