Overview
The Synchronizing function allows closing of asynchronous networks at the correct moment including the breaker closing time, which improves the network stability. “Synchrocheck, energizing check, and synchronizing (SESRSYN)” function checks that the voltages on both sides of the circuit breaker are in synchronism, or with at least one side dead to ensure that closing can be done safely.
For more detailed information on “Synchrocheck, energizing check, and synchronizing (SESRSYN)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
Function Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Synchrocheck, energizing check, and synchronizing | SESRSYN | sc/vc | 25 |
Signals & Setting Parameters
SESRSYN function block
SESRSYN Input signals
| SESRSYN Input signals | |||
| Name | Type | Default | Description |
| U3PBB1 | GROUP SIGNAL | – | Group signal for phase to earth voltage input L1, busbar 1 |
| U3PBB2 | GROUP SIGNAL | – | Group signal for phase to earth voltage input L1, busbar 2 |
| U3PLN1 | GROUP SIGNAL | – | Group signal for phase to earth voltage input L1, line 1 |
| U3PLN2 | GROUP SIGNAL | – | Group signal for phase to earth voltage input L1, line 2 |
| BLOCK | BOOLEAN | 0 | General block |
| BLKSYNCH | BOOLEAN | 0 | Block synchronizing |
| BLKSC | BOOLEAN | 0 | Block synchro check |
| BLKENERG | BOOLEAN | 0 | Block energizing check |
| B1QOPEN | BOOLEAN | 0 | Open status for CB or disconnector connected to bus1 |
| B1QCLD | BOOLEAN | 0 | Close status for CB or disconnector connected to bus1 |
| B2QOPEN | BOOLEAN | 0 | Open status for CB or disconnector connected to bus2 |
| B2QCLD | BOOLEAN | 0 | Close status for CB or disconnector connected to bus2 |
| LN1QOPEN | BOOLEAN | 0 | Open status for CB or disconnector connected to line1 |
| LN1QCLD | BOOLEAN | 0 | Close status for CB or disconnector connected to line1 |
| LN2QOPEN | BOOLEAN | 0 | Open status for CB or disconnector connected to line2 |
| LN2QCLD | BOOLEAN | 0 | Close status for CB or disconnector connected to line2 |
| UB1OK | BOOLEAN | 0 | Bus1 voltage transformer OK |
| UB1FF | BOOLEAN | 0 | Bus1 voltage transformer fuse failure |
| UB2OK | BOOLEAN | 0 | Bus2 voltage transformer OK |
| UB2FF | BOOLEAN | 0 | Bus2 voltage transformer fuse failure |
| ULN1OK | BOOLEAN | 0 | Line1 voltage transformer OK |
| ULN1FF | BOOLEAN | 0 | Line1 voltage transformer fuse failure |
| ULN2OK | BOOLEAN | 0 | Line2 voltage transformer OK |
| ULN2FF | BOOLEAN | 0 | Line2 voltage transformer fuse failure |
| STARTSYN | BOOLEAN | 0 | Start synchronizing |
| TSTSYNCH | BOOLEAN | 0 | Set synchronizing in test mode |
| TSTSC | BOOLEAN | 0 | Set synchro check in test mode |
| TSTENERG | BOOLEAN | 0 | Set energizing check in test mode |
| AENMODE | INTEGER | 0 | Input for setting of automatic energizing mode |
| MENMODE | INTEGER | 0 | Input for setting of manual energizing mode |
SESRSYN Output signals
| SESRSYN Output signals | |||
| Name | Type | Description | |
| SYNOK | BOOLEAN | Synchronizing OK output | |
| AUTOSYOK | BOOLEAN | Auto synchro check OK | |
| AUTOENOK | BOOLEAN | Automatic energizing check OK | |
| MANSYOK | BOOLEAN | Manual synchro check OK | |
| MANENOK | BOOLEAN | Manual energizing check OK | |
| TSTSYNOK | BOOLEAN | Synchronizing OK test output | |
| TSTAUTSY | BOOLEAN | Auto synchro check OK test output | |
| TSTMANSY | BOOLEAN | Manual synchro check OK test output | |
| TSTENOK | BOOLEAN | Energizing check OK test output | |
| USELFAIL | BOOLEAN | Selected voltage transformer fuse failed | |
| B1SEL | BOOLEAN | Bus1 selected | |
| B2SEL | BOOLEAN | Bus2 selected | |
| LN1SEL | BOOLEAN | Line1 selected | |
| LN2SEL | BOOLEAN | Line2 selected | |
| SYNPROGR | BOOLEAN | Synchronizing in progress | |
| SYNFAIL | BOOLEAN | Synchronizing failed | |
| UOKSYN | BOOLEAN | Voltage amplitudes for synchronizing above set limits | |
| UDIFFSYN | BOOLEAN | Voltage difference out of limit for synchronizing | |
| FRDIFSYN | BOOLEAN | Frequency difference out of limit for synchronizing | |
| FRDIFFOK | BOOLEAN | Frequency difference in band for synchronizing | |
| FRDERIVA | BOOLEAN | Frequency derivative out of limit for synchronizing | |
| UOKSC | BOOLEAN | Voltage amplitudes above set limits | |
| UDIFFSC | BOOLEAN | Voltage difference out of limit | |
| FRDIFFA | BOOLEAN | Frequency difference out of limit for Auto operation | |
| PHDIFFA | BOOLEAN | Phase angle difference out of limit for Auto operation | |
| FRDIFFM | BOOLEAN | Frequency difference out of limit for Manual operation | |
| PHDIFFM | BOOLEAN | Phase angle difference out of limit for Manual Operation | |
| INADVCLS | BOOLEAN | Inadvertent circuit breaker closing | |
| UDIFFME | REAL | Calculated difference of voltage in p.u of set voltage base value | |
| FRDIFFME | REAL | Calculated difference of frequency | |
| PHDIFFME | REAL | Calculated difference of phase angle | |
| UBUS | REAL | Bus voltage | |
| ULINE | REAL | Line voltage | |
| MODEAEN | INTEGER | Selected mode for automatic energizing | |
| MODEMEN | INTEGER | Selected mode for manual energizing | |
SESRSYN Group settings (basic)
| SESRSYN Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| OperationSynch | Off On |
– | – | Off | Operation for synchronizing function Off/On |
| UHighBusSynch | 50.0 – 120.0 | %UBB | 1.0 | 80.0 | Voltage high limit bus for synchronizing in % of UBaseBus |
| UHighLineSynch | 50.0 – 120.0 | %UBL | 1.0 | 80.0 | Voltage high limit line for synchronizing in % of UBaseLine |
| UDiffSynch | 0.02 – 0.50 | pu | 0.01 | 0.10 | Voltage difference limit for synchronizing in p.u of set voltage base value |
| FreqDiffMin | 0.003 – 0.250 | Hz | 0.001 | 0.010 | Minimum frequency difference limit for synchronizing |
| FreqDiffMax | 0.050 – 1.000 | Hz | 0.001 | 0.200 | Maximum frequency difference limit for synchronizing |
| CloseAngleMax | 15.0 – 30.0 | Deg | 1.0 | 15.0 | Maximum closing angle between bus and line for synchronizing |
| FreqRateChange | 0.000 – 0.500 | Hz/s | 0.001 | 0.300 | Maximum allowed frequency rate of change |
| tBreaker | 0.000 – 1.000 | s | 0.001 | 0.080 | Closing time of the breaker |
| tClosePulse | 0.050 – 60.000 | s | 0.001 | 0.200 | Breaker closing pulse duration |
| tMaxSynch | 0.00 – 6000.00 | s | 0.01 | 600.00 | Resets synch if no close has been made before set time |
| tMinSynch | 0.000 – 60.000 | s | 0.001 | 2.000 | Minimum time to accept synchronizing conditions |
| OperationSC | Off On |
– | – | On | Operation for synchronism check function Off/On |
| UHighBusSC | 50.0 – 120.0 | %UBB | 1.0 | 80.0 | Voltage high limit bus for synchrocheck in % of UBaseBus |
| UHighLineSC | 50.0 – 120.0 | %UBL | 1.0 | 80.0 | Voltage high limit line for synchrocheck in % of UBaseLine |
| UDiffSC | 0.02 – 0.50 | pu | 0.01 | 0.15 | Voltage difference limit for synchrocheck in p.u of set voltage base value |
| FreqDiffA | 0.003 – 1.000 | Hz | 0.001 | 0.010 | Frequency difference limit between bus and line Auto |
| FreqDiffM | 0.003 – 1.000 | Hz | 0.001 | 0.010 | Frequency difference limit between bus and line Manual |
| PhaseDiffA | 5.0 – 90.0 | Deg | 1.0 | 25.0 | Phase angle difference limit between bus and line Auto |
| PhaseDiffM | 5.0 – 90.0 | Deg | 1.0 | 25.0 | Phase angle difference limit between bus and line Manual |
| tSCA | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay output for synchrocheck Auto |
| tSCM | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay output for synchrocheck Manual |
| AutoEnerg | Off DLLB DBLL Both |
– | – | DLLB | Automatic energizing check mode |
| ManEnerg | Off DLLB DBLL Both |
– | – | Both | Manual energizing check mode |
| ManEnergDBDL | Off On |
– | – | Off | Manual dead bus, dead line energizing |
| UHighBusEnerg | 50.0 – 120.0 | %UBB | 1.0 | 80.0 | Voltage high limit bus for energizing check in % of UBaseBus |
| UHighLineEnerg | 50.0 – 120.0 | %UBL | 1.0 | 80.0 | Voltage high limit line for energizing check in % of UBaseLine |
| ULowBusEnerg | 10.0 – 80.0 | %UBB | 1.0 | 40.0 | Voltage low limit bus for energizing check in % of UBaseBus |
| ULowLineEnerg | 10.0 – 80.0 | %UBL | 1.0 | 40.0 | Voltage low limit line for energizing check in % of UBaseLine |
| UMaxEnerg | 50.0 – 180.0 | %UB | 1.0 | 115.0 | Maximum voltage for energizing in % of UBase, Line and/or Bus |
| tAutoEnerg | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay for automatic energizing check |
| tManEnerg | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay for manual energizing check |
SESRSYN Non group settings (basic)
| SESRSYN Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| SelPhaseBus1 | Phase L1 Phase L2 Phase L3 Phase L1L2 Phase L2L3 Phase L3L1 Positive sequence |
– | – | Phase L1 | Select phase for busbar1 |
| GblBaseSelBus | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups, Bus |
| GblBaseSelLine | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups, Line |
| SelPhaseBus2 | Phase L1 Phase L2 Phase L3 Phase L1L2 Phase L2L3 Phase L3L1 Positive sequence |
– | – | Phase L1 | Select phase for busbar2 |
| SelPhaseLine1 | Phase L1 Phase L2 Phase L3 Phase L1L2 Phase L2L3 Phase L3L1 Positive sequence |
– | – | Phase L1 | Select phase for line1 |
| SelPhaseLine2 | Phase L1 Phase L2 Phase L3 Phase L1L2 Phase L2L3 Phase L3L1 Positive sequence |
– | – | Phase L1 | Select phase for line2 |
| CBConfig | No voltage sel. Double bus 1 1/2 bus CB 1 1/2 bus alt. CB Tie CB |
– | – | No voltage sel. | Select CB configuration |
SESRSYN Non group settings (advanced)
| SESRSYN Non group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| PhaseShift | -180 – 180 | Deg | 1 | 0 | Additional phase angle for selected line voltage |
SESRSYN Monitored data
| SESRSYN Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| UDIFFME | REAL | – | – | Calculated difference of voltage in p.u of set voltage base value |
| FRDIFFME | REAL | – | Hz | Calculated difference of frequency |
| PHDIFFME | REAL | – | deg | Calculated difference of phase angle |
| UBUS | REAL | – | kV | Bus voltage |
| ULINE | REAL | – | kV | Line voltage |
Logics & highlights
Simplified logic diagram for the auto synchrocheck function
Dependencies between tBreaker and SlipFrequency with different CloseAngleMax values
| tBreaker [s] (max settable value) with CloseAngleMax = 15 degrees [default value] |
tBreaker [s] (max settable value) with CloseAngleMax = 30 degrees [max value] |
SlipFrequency [Hz] (BusFrequency – LineFrequency) |
| 0.040 | 0.080 | 1.000 |
| 0.050 | 0.100 | 0.800 |
| 0.080 | 0.160 | 0.500 |
| 0.200 | 0.400 | 0.200 |
| 0.400 | 0.810 | 0.100 |
| 1.000 | 0.080 | |
| 0.800 | 0.050 | |
| 1.000 | 0.040 |
Simplified logic diagram for the synchronizing function
Manual energizing
Automatic energizing
Open bays
Logic diagram for the voltage selection function of a single circuit breaker with double busbars
Simplified logic diagram for the voltage selection function for a bus circuit breaker in a 1 1/2 breaker arrangement
Simplified logic diagram for the voltage selection function for the tie circuit breaker in 1 1/2 breaker arrangement
