ABB REC650 Applications Manual page 47

1MRK 511 286-UUS A
Application manual
The 22 kV phase-to-phase (A - B) VT is connected to input 9.
The 22 kV open delta connected VT (residual voltage) is connected to input 10.
1. Set the 145 kV current transformer input 1.
1.1. Set CTStarPoint1 to ToObject
(The CT secondary is grounded towards the protected transformer)
1.2. Set CTSec1 to 1 A
(The rated secondary current of the CT)
1.3. Set CTPrim1 to 300 A
(The rated primary current of the CT)
2. Set current inputs 2 and 3 to the same values as for current input 1.
3. Set the 22 kV current transformer input 4.
3.1. Set CTStarPoint4 to ToObject
(The CT secondary is grounded towards the protected transformer)
3.2. Set CTSec4 to 1 A
(The rated secondary current of the CT)
3.3. Set CTPrim4 to 2000 A
(The rated primary current of the CT)
4. Set current inputs 5 and 6 to the same values as for current input 4.
5. Set the 145 kV neutral point current transformer input 7.
5.1. Set CTStarPoint7 to ToObject
(The CT secondary is grounded towards the protected line)
5.2. Set CTSec7 to 1 A
(The rated secondary current of the CT)
5.3. Set CTPrim7 to 300 A
(The rated primary current of the CT)
Current input 8 is intended for connection of a low voltage side
neutral point CT. In this application the input is not used.
6. Set the voltage transformer inputs 9 and 10.
6.1. Set VTSec9 to 110 V
(The rated secondary voltage of the VT, given as phase-phase voltage)
6.2. Set VTPrim9 to 22 kV
(The rated secondary voltage of the VT, given as phase-phase voltage)
6.3. Set VTSec10 to 110 V/√3
(The rated secondary voltage of the VT, given as phase-phase voltage)
6.4. Set VTPrim10 to 22 kV
(The rated secondary voltage of the VT, given as phase-phase voltage)
Section 3
REC650 setting examples
41