ABB RELION REX640 Technical Manual page 1439

1MRS759142 C
REX640
Technical Manual
ENERG_STATE From
Energizing check
U_A_AB
U_B_BC
U3P1
U_C_CA
U_A_AB
U3P2
BYPASS
ASC1_NS_DAT
BLOCK
CB_TEST
EXT_CHECK
CL_COMMAND
CB_CLOSE
CB_OPEN
ISO_A1_CLOSE
ISO_A2_CLOSE
ISO_B1_CLOSE
ISO_B2_CLOSE
GUID-5196EBDC-C817-4BA0-B23C-6F5AC3E57283 V2 EN
Figure 767: Module diagram for Synchronization check and control
Synchro check
The function measures the voltage difference U_DIFF_MEAS, frequency difference
FR_DIFF_MEAS and phase angle difference PH_DIFF_MEAS between the two bus
sides.
U DIFF MEAS U
_ _
=
BusA
GUID-996AAEFB-E616-40E1-94B6-426EAD2D72EA V1 EN
U Measured bus A side voltage
BusA
U Measured bus B side voltage
BusB
Voltage offset
Voltage offset Setting
FR DIFF MEAS f
_ _
=
BusA
GUID-AB2B754C-3BDC-4E05-9D63-7B299A0D7173 V1 EN
f Measured bus A side frequency
BusA
f Measured bus B side frequency
BusB
Frequency offset
Frequency offset Setting
Synchro
check
Close CB
condition
U Voltage offset
− +
BusB
f Frequency offset
− +
BusB
Section 9
Control functions
U_DIFF
FR_DIFF_MEAS
MATCH_INPRO
MATCH_OK
CL_FAIL_AL
Alarms
CMD_FAIL_AL
generation
CB_SELECTED
AS_INIT_FAIL
Synchroni- SYNC_INPRO
zation
SYNC_OK
control
CLOSE_CB
NS_ASC_DAT
(Equation 331)
(Equation 332)
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