Overview
The “Four step directional negative phase sequence overcurrent protection (NS4PTOC)” function has an inverse or definite time delay independent for each step separately. All IEC and ANSI time delayed characteristics are available together with an optional user defined characteristic. The directional function is voltage polarized.
For more detailed information on “Four step directional negative phase sequence overcurrent protection (NS4PTOC)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
NS4PTOC Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Four step negative sequence overcurrent protection | NS4PTOC | I2 4I–c–I 4I—–I |
46I2 |
Signals & Setting Parameters
NS4PTOC function block
NS4PTOC Input signals
| NS4PTOC Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Group connection for operate current |
| I3PDIR | GROUP SIGNAL | – | Group connection for directional current |
| U3P | GROUP SIGNAL | – | Group connection for polarizing voltage |
| BLOCK | BOOLEAN | 0 | General block |
| BLKTR | BOOLEAN | 0 | Block of trip |
| BLKST1 | BOOLEAN | 0 | Block of step 1 (Start and trip) |
| BLKST2 | BOOLEAN | 0 | Block of step 2 (Start and trip) |
| BLKST3 | BOOLEAN | 0 | Block of step 3 (Start and trip) |
| BLKST4 | BOOLEAN | 0 | Block of step 4 (Start and trip) |
| ENMULT1 | BOOLEAN | 0 | When activated, the current multiplier is in use for step1 |
| ENMULT2 | BOOLEAN | 0 | When activated, the current multiplier is in use for step2 |
| ENMULT3 | BOOLEAN | 0 | When activated, the current multiplier is in use for step3 |
| ENMULT4 | BOOLEAN | 0 | When activated, the current multiplier is in use for step4 |
NS4PTOC Output signals
| NS4PTOC Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | General trip signal | |
| TR1 | BOOLEAN | Trip signal from step 1 | |
| TR2 | BOOLEAN | Trip signal from step 2 | |
| TR3 | BOOLEAN | Trip signal from step 3 | |
| TR4 | BOOLEAN | Trip signal from step 4 | |
| START | BOOLEAN | General start signal | |
| ST1 | BOOLEAN | Start signal step 1 | |
| ST2 | BOOLEAN | Start signal step 2 | |
| ST3 | BOOLEAN | Start signal step 3 | |
| ST4 | BOOLEAN | Start signal step 4 | |
| STFW | BOOLEAN | Forward directional start signal | |
| STRV | BOOLEAN | Reverse directional start signal | |
NS4PTOC Group settings (basic)
| NS4PTOC Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| EnDir | Disable Enable |
– | – | Enable | Enabling the Directional calculation |
| AngleRCA | -180 – 180 | Deg | 1 | 65 | Relay characteristic angle (RCA) |
| UPolMin | 1 – 100 | %UB | 1 | 5 | Minimum voltage level for polarization in % of UBase |
| I2>Dir | 1 – 100 | %IB | 1 | 10 | Residual current level in % of IBase for Direction release |
| DirMode1 | Off Non-directional Forward Reverse |
– | – | Non-directional | Directional mode of step 1 (off, nodir, forward, reverse) |
| Characterist1 | ANSI Ext. inv. ANSI Very inv. ANSI Norm. inv. ANSI Mod. inv. ANSI Def. Time L.T.E. inv. L.T.V. inv. L.T. inv. IEC Norm. inv. IEC Very inv. IEC inv. IEC Ext. inv. IEC S.T. inv. IEC L.T. inv. IEC Def. Time Reserved Programmable RI type RD type |
– | – | ANSI Def. Time | Time delay characteristic for step 1 |
| I2-1> | 1 – 2500 | %IB | 1 | 100 | Negative sequence current op level for step 1 in % of IBase |
| t1 | 0.000 – 60.000 | s | 0.001 | 0.000 | Time delay of step 1 when definite time char. is selected |
| k1 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the step 1 selected time characteristic |
| IMin1 | 1.00 – 10000.00 | %IB | 1.00 | 100.00 | Minimum current for step 1 |
| t1Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse time characteristic step 1 |
| I1Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for scaling the current setting value for step 1 |
| DirMode2 | Off Non-directional Forward Reverse |
– | – | Non-directional | Directional mode of step 2 (off, nodir, forward, reverse) |
| Characterist2 | ANSI Ext. inv. ANSI Very inv. ANSI
Norm. inv. ANSI Mod. inv. ANSI Def. Time L.T.E. inv. L.T.V. inv. L.T. inv. IEC Norm. inv. IEC Very inv. IEC inv. IEC Ext. inv. IEC S.T. inv. IEC L.T. inv. IEC Def. Time Reserved Programmable RI type RD type |
– | – | ANSI Def. Time | Time delay characteristic for step 2 |
| I2-2> | 1 – 2500 | %IB | 1 | 50 | Negative sequence current op level for step 2 in % of IBase |
| t2 | 0.000 – 60.000 | s | 0.001 | 0.400 | Time delay of step 2 when definite time char. is selected |
| k2 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the step 2 selected time characteristic |
| IMin2 | 1.00 – 10000.00 | %IB | 1.00 | 50 | Minimum current for step 2 |
| t2Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse time characteristic step 2 |
| I2Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for scaling the current setting value for step 2 |
| DirMode3 | Off Non-directional Forward Reverse |
– | – | Non-directional | Directional mode of step 3 (off, nodir, forward, reverse) |
| Characterist3 | ANSI Ext. inv. ANSI Very inv. ANSI Norm. inv. ANSI Mod. inv. ANSI Def. Time L.T.E. inv. L.T.V. inv. L.T. inv. IEC Norm. inv. IEC Very inv. IEC inv. IEC Ext. inv. IEC S.T. inv. IEC L.T. inv. IEC Def. Time Reserved Programmable RI type RD type |
– | – | ANSI Def. Time | Time delay characteristic for step 3 |
| I2-3> | 1 – 2500 | %IB | 1 | 33 | Negative sequence current op level for step 3 in % of IBase |
| t3 | 0.000 – 60.000 | s | 0.001 | 0.800 | Time delay of step 3 when definite time char. is selected |
| k3 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the step 3 selected time characteristic |
| IMin3 | 1.00 – 10000.00 | %IB | 1.00 | 33 | Minimum current for step 3 |
| t3Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse time characteristic step 3 |
| I3Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for scaling the current setting value for step 3 |
| DirMode4 | Off Non-directional Forward Reverse |
– | – | Non-directional | Directional mode of step 4 (off, nodir, forward, reverse) |
| Characterist4 | ANSI Ext. inv. ANSI Very inv. ANSI Norm. inv. ANSI Mod. inv. ANSI Def. Time L.T.E. inv. L.T.V. inv. L.T. inv. IEC Norm. inv. IEC Very inv. IEC inv. IEC Ext. inv. IEC S.T. inv. IEC L.T. inv. IEC Def. Time Reserved Programmable RI type RD type |
– | – | ANSI Def. Time | Time delay characteristic for step 4 |
| I2-4> | 1 – 2500 | %IB | 1 | 17 | Negative sequence current op level for step 4 in % of IBase |
| t4 | 0.000 – 60.000 | s | 0.001 | 1.200 | Time delay of step 4 when definite time char. is selected |
| k4 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the step 4 selected time characteristic |
| IMin4 | 1.00 – 10000.00 | %IB | 1.00 | 17 | Minimum current for step 4 |
| t4Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse time characteristic step 4 |
| I4Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for scaling the current setting value for step 4 |
NS4PTOC Group settings (advanced)
| NS4PTOC Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| ResetTypeCrv1 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Reset curve type for step1 (Instantaneous / IEC / ANSI) |
| tReset1 | 0.000 – 60.000 | s | 0.001 | 0.020 | Reset time delay for step 1 |
| tPCrv1 | 0.005 – 3.000 | – | 0.001 | 1.000 | Param P for customized inverse trip time curve for step 1 |
| tACrv1 | 0.005 – 200.000 | – | 0.001 | 13.500 | Param A for customized inverse trip time curve for step 1 |
| tBCrv1 | 0.00 – 20.00 | – | 0.01 | 0.00 | Param B for customized inverse trip time curve for step 1 |
| tCCrv1 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param C for customized inverse trip time curve for step 1 |
| tPRCrv1 | 0.005 – 3.000 | – | 0.001 | 0.500 | Param PR for customized inverse reset time curve for step 1 |
| tTRCrv1 | 0.005 – 100.000 | – | 0.001 | 13.500 | Param TR for customized inverse reset time curve for step |
| tCRCrv1 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param CR for customized inverse reset time curve for step 1 |
| ResetTypeCrv2 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Reset curve type for step2 (Instantaneous / IEC / ANSI) |
| tReset2 | 0.000 – 60.000 | s | 0.001 | 0.020 | Reset time delay for step 2 |
| tPCrv2 | 0.005 – 3.000 | – | 0.001 | 1.000 | Param P for customized inverse trip time curve for step 2 |
| tACrv2 | 0.005 – 200.000 | – | 0.001 | 13.500 | Param A for customized inverse trip time curve for step 2 |
| tBCrv2 | 0.00 – 20.00 | – | 0.01 | 0.00 | Param B for customized inverse trip time curve for step 2 |
| tCCrv2 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param C for customized inverse trip time curve for step 2 |
| tPRCrv2 | 0.005 – 3.000 | – | 0.001 | 0.500 | Param PR for customized inverse reset time curve for step 2 |
| tTRCrv2 | 0.005 – 100.000 | – | 0.001 | 13.500 | Param TR for customized inverse reset time curve for step 2 |
| tCRCrv2 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param C for customized inverse reset time curve for step 2 |
| ResetTypeCrv3 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Reset curve type for step3 (Instantaneous / IEC / ANSI) |
| tReset3 | 0.000 – 60.000 | s | 0.001 | 0.020 | Reset time delay for step 3 |
| tPCrv3 | 0.005 – 3.000 | – | 0.001 | 1.000 | Param P for customized inverse trip time curve for step 3 |
| tACrv3 | 0.005 – 200.000 | – | 0.001 | 13.500 | Param A for customized inverse trip time curve for step 3 |
| tBCrv3 | 0.00 – 20.00 | – | 0.01 | 0.00 | Param B for customized inverse trip time curve for step 3 |
| tCCrv3 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param C for customized inverse trip time curve for step 3 |
| tPRCrv3 | 0.005 – 3.000 | – | 0.001 | 0.500 | Param PR for customized inverse reset time curve for step 3 |
| tTRCrv3 | 0.005 – 100.000 | – | 0.001 | 13.500 | Param TR for customized inverse reset time curve for step 3 |
| tCRCrv3 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param CR for customized inverse reset time curve for step 3 |
| ResetTypeCrv4 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Reset curve type for step4 (Instantaneous / IEC / ANSI) |
| tReset4 | 0.000 – 60.000 | s | 0.001 | 0.020 | Reset time delay for step 4 |
| tPCrv4 | 0.005 – 3.000 | – | 0.001 | 1.000 | Param P for customized inverse trip time curve for step 4 |
| tACrv4 | 0.005 – 200.000 | – | 0.001 | 13.500 | Param A for customized inverse trip time curve for step 4 |
| tBCrv4 | 0.00 – 20.00 | – | 0.01 | 0.00 | Param B for customized inverse trip time curve for step 4 |
| tCCrv4 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param C for customized inverse trip time curve for step 4 |
| tPRCrv4 | 0.005 – 3.000 | – | 0.001 | 0.500 | Param PR for customized inverse reset time curve for step 4 |
| tTRCrv4 | 0.005 – 100.000 | – | 0.001 | 13.500 | Param TR for customized inverse reset time curve for step 4 |
| tCRCrv4 | 0.1 – 10.0 | – | 0.1 | 1.0 | Param CR for customized inverse reset time curve for step 4 |
NS4PTOC Non group settings (basic)
| NS4PTOC Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
NS4PTOC Monitored data
| NS4PTOC Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| IOp | REAL | – | A | Operating current level |
| UPol | REAL | – | kV | Polarizing voltage level |
| UPOLIANG | REAL | – | deg | Polarizing angle between voltage and current |
Logics & highlights
Simplified logic diagram for negative sequence overcurrent stage x , where x=1, 2, 3 or 4
Operating characteristic for fault directional element
Simplified logic diagram for directional supervision element with integrated directional comparison step
