Overview
The “Directional phase overcurrent protection, four steps (OC4PTOC)” function has an inverse or definite time delay for each step.
All IEC and ANSI inverse time characteristics are available together with an optional user defined time characteristic.
For more detailed information on “Directional phase overcurrent protection, four steps (OC4PTOC)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
OC4PTOC Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Directional phase overcurrent protection, four steps | OC4PTOC | 4(3I>) 4I–c–I 4I—–I |
51_67 |
Signals & Setting Parameters
OC4PTOC function block
OC4PTOC Input signals
| OC4PTOC Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Group signal for current input |
| U3P | GROUP SIGNAL | – | Group signal for voltage input |
| BLOCK | BOOLEAN | 0 | Block of function |
| BLKTR | BOOLEAN | 0 | Block of trip |
| BLKST1 | BOOLEAN | 0 | Block of Step1 |
| BLKST2 | BOOLEAN | 0 | Block of Step2 |
| BLKST3 | BOOLEAN | 0 | Block of Step3 |
| BLKST4 | BOOLEAN | 0 | Block of Step4 |
| 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 |
OC4PTOC Output signals
| OC4PTOC Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip | |
| TR1 | BOOLEAN | Common trip signal from step1 | |
| TR2 | BOOLEAN | Common trip signal from step2 | |
| TR3 | BOOLEAN | Common trip signal from step3 | |
| TR4 | BOOLEAN | Common trip signal from step4 | |
| TRL1 | BOOLEAN | Trip signal from phase L1 | |
| TRL2 | BOOLEAN | Trip signal from phase L2 | |
| TRL3 | BOOLEAN | Trip signal from phase L3 | |
| TR1L1 | BOOLEAN | Trip signal from step1 phase L1 | |
| TR1L2 | BOOLEAN | Trip signal from step1 phase L2 | |
| TR1L3 | BOOLEAN | Trip signal from step1 phase L3 | |
| TR2L1 | BOOLEAN | Trip signal from step2 phase L1 | |
| TR2L2 | BOOLEAN | Trip signal from step2 phase L2 | |
| TR2L3 | BOOLEAN | Trip signal from step2 phase L3 | |
| TR3L1 | BOOLEAN | Trip signal from step3 phase L1 | |
| TR3L2 | BOOLEAN | Trip signal from step3 phase L2 | |
| TR3L3 | BOOLEAN | Trip signal from step3 phase L3 | |
| TR4L1 | BOOLEAN | Trip signal from step4 phase L1 | |
| TR4L2 | BOOLEAN | Trip signal from step4 phase L2 | |
| TR4L3 | BOOLEAN | Trip signal from step4 phase L3 | |
| START | BOOLEAN | General start signal | |
| ST1 | BOOLEAN | Common start signal from step1 | |
| ST2 | BOOLEAN | Common start signal from step2 | |
| ST3 | BOOLEAN | Common start signal from step3 | |
| ST4 | BOOLEAN | Common start signal from step4 | |
| STL1 | BOOLEAN | Start signal from phase L1 | |
| STL2 | BOOLEAN | Start signal from phase L2 | |
| STL3 | BOOLEAN | Start signal from phase L3 | |
| ST1L1 | BOOLEAN | Start signal from step1 phase L1 | |
| ST1L2 | BOOLEAN | Start signal from step1 phase L2 | |
| ST1L3 | BOOLEAN | Start signal from step1 phase L3 | |
| ST2L1 | BOOLEAN | Start signal from step2 phase L1 | |
| ST2L2 | BOOLEAN | Start signal from step2 phase L2 | |
| ST2L3 | BOOLEAN | Start signal from step2 phase L3 | |
| ST3L1 | BOOLEAN | Start signal from step3 phase L1 | |
| ST3L2 | BOOLEAN | Start signal from step3 phase L2 | |
| ST3L3 | BOOLEAN | Start signal from step3 phase L3 | |
| ST4L1 | BOOLEAN | Start signal from step4 phase L1 | |
| ST4L2 | BOOLEAN | Start signal from step4 phase L2 | |
| ST4L3 | BOOLEAN | Start signal from step4 phase L3 | |
| ST2NDHRM | BOOLEAN | Second harmonic detected | |
| DIRL1 | INTEGER | Direction for phase1 | |
| DIRL2 | INTEGER | Direction for phase2 | |
| DIRL3 | INTEGER | Direction for phase3 | |
| STDIRCND | INTEGER | Binary coded start and directional information | |
OC4PTOC Group settings (basic)
| OC4PTOC Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| AngleRCA | 40 – 65 | Deg | 1 | 55 | Relay characteristic angle (RCA) |
| AngleROA | 40 – 89 | Deg | 1 | 80 | Relay operation angle (ROA) |
| StartPhSel | 1 out of 3 2 out of 3 3 out of 3 |
– | – | 1 out of 3 | Number of phases required for op (1 of 3, 2 of 3, 3 of 3) |
| 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 | Selection of time delay curve type for step 1 |
| I1> | 5 – 2500 | %IB | 1 | 1000 | Operating phase current level for step 1 in % of IBase |
| t1 | 0.000 – 60.000 | s | 0.001 | 0.000 | Def time delay or add time delay for inverse char of step 1 |
| k1 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the inverse time delay for step 1 |
| IMin1 | 1 – 10000 | %IB | 1 | 100 | Minimum operate current for step1
in % of IBase |
| t1Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse curves for step 1 |
| I1Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for current operate level 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 | Selection of time delay curve type for step 2 |
| I2> | 5 – 2500 | %IB | 1 | 500 | Operating phase current level for step 2 in % of IBase |
| t2 | 0.000 – 60.000 | s | 0.001 | 0.400 | Def time delay or add time delay for inverse char of step 2 |
| k2 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the inverse time delay for step 2 |
| IMin2 | 1 – 10000 | %IB | 1 | 50 | Minimum operate current for step2
in % of IBase |
| t2Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse curves for step 2 |
| I2Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for current operate level 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 | Selection of time delay curve type for step 3 |
| I3> | 5 – 2500 | %IB | 1 | 250 | Operating phase current level for step 3 in % of IBase |
| t3 | 0.000 – 60.000 | s | 0.001 | 0.800 | Def time delay or add time delay for inverse char of step 3 |
| k3 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the inverse time delay for step 3 |
| IMin3 | 1 – 10000 | %IB | 1 | 33 | Minimum operate current for step3
in % of IBase |
| t3Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse curves for step 3 |
| I3Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for current operate level 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 | Selection of time delay curve type for step 4 |
| I4> | 5 – 2500 | %IB | 1 | 175 | Operating phase current level for step 4 in % of IBase |
| t4 | 0.000 – 60.000 | s | 0.001 | 2.000 | Def time delay or add time delay for inverse char of step 4 |
| k4 | 0.05 – 999.00 | – | 0.01 | 0.05 | Time multiplier for the inverse time delay for step 4 |
| IMin4 | 1 – 10000 | %IB | 1 | 17 | Minimum operate current for step4
in % of IBase |
| t4Min | 0.000 – 60.000 | s | 0.001 | 0.000 | Minimum operate time for inverse curves for step 4 |
| I4Mult | 1.0 – 10.0 | – | 0.1 | 2.0 | Multiplier for current operate level for step 4 |
OC4PTOC Group settings (advanced)
| OC4PTOC Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| IMinOpPhSel | 1 – 100 | %IB | 1 | 7 | Minimum current for phase selection in % of IBase |
| 2ndHarmStab | 5 – 100 | % | 1 | 20 | Operate level of 2nd harmonic curr
in % of fundamental curr |
| I1>Min | 5 – 2500 | %IB | 1 | 5 | Minimum used operating phase current level for step 1 in % of IBase, if I1> is less than I1>Min then I1> is set to I1>Min |
| I1>Max | 5 – 2500 | %IB | 1 | 2500 | Maximum used operating phase current level for step 1 in % of IBase, if I1> is greater than I1>Max then I1> is set to I1>Max |
| ResetTypeCrv1 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Selection of reset curve type for step 1 |
| tReset1 | 0.000 – 60.000 | s | 0.001 | 0.020 | Constant reset time for step 1 |
| tPCrv1 | 0.005 – 3.000 | – | 0.001 | 1.000 | Parameter P for customer programmable curve for step 1 |
| tACrv1 | 0.005 – 200.000 | – | 0.001 | 13.500 | Parameter A for customer programmable curve for step 1 |
| tBCrv1 | 0.00 – 20.00 | – | 0.01 | 0.00 | Parameter B for customer programmable curve for step 1 |
| tCCrv1 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter C for customer programmable curve for step 1 |
| tPRCrv1 | 0.005 – 3.000 | – | 0.001 | 0.500 | Parameter PR for customer programmable curve for step 1 |
| tTRCrv1 | 0.005 – 100.000 | – | 0.001 | 13.500 | Parameter TR for customer programmable curve for step 1 |
| tCRCrv1 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter CR for customer programmable curve for step 1 |
| HarmBlock1 | Off On |
– | – | Off | Enable block of step 1 from harmonic restrain |
| I2>Min | 5 – 2500 | %IB | 1 | 5 | Minimum used operating phase current level for step 2 in % of IBase, if I2> is less than I2>Min then I2> is set to I2>Min |
| I2>Max | 5 – 2500 | %IB | 1 | 2500 | Maximum used operating phase current level for step 2 in % of IBase, if I2> is greater than I2>Max then I2> is set to I2>Max |
| ResetTypeCrv2 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Selection of reset curve type for step 2 |
| tReset2 | 0.000 – 60.000 | s | 0.001 | 0.020 | Constant reset time for step 2 |
| tPCrv2 | 0.005 – 3.000 | – | 0.001 | 1.000 | Parameter P for customer programmable curve for step 2 |
| tACrv2 | 0.005 – 200.000 | – | 0.001 | 13.500 | Parameter A for customer programmable curve for step 2 |
| tBCrv2 | 0.00 – 20.00 | – | 0.01 | 0.00 | Parameter B for customer programmable curve for step 2 |
| tCCrv2 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter C for customer programmable curve for step 2 |
| tPRCrv2 | 0.005 – 3.000 | – | 0.001 | 0.500 | Parameter PR for customer programmable curve for step 2 |
| tTRCrv2 | 0.005 – 100.000 | – | 0.001 | 13.500 | Parameter TR for customer programmable curve for step 2 |
| tCRCrv2 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter CR for customer programmable curve for step 2 |
| HarmBlock2 | Off On |
– | – | Off | Enable block of step 2 from harmonic restrain |
| I3>Min | 5 – 2500 | %IB | 1 | 5 | Minimum used operating phase current level for step 3 in % of IBase, if I3> is less than I3>Min then I3> is set to I3>Min |
| I3>Max | 5 – 2500 | %IB | 1 | 2500 | Maximum used operating phase current level for step 3 in % of IBase, if I3> is greater than I3>Max then I3> is set to I3>Max |
| ResetTypeCrv3 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Selection of reset curve type for step 3 |
| tReset3 | 0.000 – 60.000 | s | 0.001 | 0.020 | Constant reset time for step 3 |
| tPCrv3 | 0.005 – 3.000 | – | 0.001 | 1.000 | Parameter P for customer programmable curve for step 3 |
| tACrv3 | 0.005 – 200.000 | – | 0.001 | 13.500 | Parameter A for customer programmable curve for step 3 |
| tBCrv3 | 0.00 – 20.00 | – | 0.01 | 0.00 | Parameter B for customer programmable curve for step 3 |
| tCCrv3 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter C for customer programmable curve for step 3 |
| tPRCrv3 | 0.005 – 3.000 | – | 0.001 | 0.500 | Parameter PR for customer programmable curve for step 3 |
| tTRCrv3 | 0.005 – 100.000 | – | 0.001 | 13.500 | Parameter TR for customer programmable curve for step 3 |
| tCRCrv3 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter CR for customer programmable curve for step 3 |
| HarmBlock3 | Off On |
– | – | Off | Enable block of step 3 from harmonic restrain |
| I4>Min | 5 – 2500 | %IB | 1 | 5 | Minimum used operating phase current level for step 4 in % of IBase, if I4> is less than I4>Min then I4> is set to I4>Min |
| I4>Max | 5 – 2500 | %IB | 1 | 2500 | Maximum used operating phase current level for step 4 in % of IBase, if I4> is greater than I4>Max then I4> is set to I4>Max |
| ResetTypeCrv4 | Instantaneous IEC Reset ANSI reset |
– | – | Instantaneous | Selection of reset curve type for step 4 |
| tReset4 | 0.000 – 60.000 | s | 0.001 | 0.020 | Constant reset time for step 4 |
| tPCrv4 | 0.005 – 3.000 | – | 0.001 | 1.000 | Parameter P for customer programmable curve for step 4 |
| tACrv4 | 0.005 – 200.000 | – | 0.001 | 13.500 | Parameter A for customer programmable curve for step 4 |
| tBCrv4 | 0.00 – 20.00 | – | 0.01 | 0.00 | Parameter B for customer programmable curve for step 4 |
| tCCrv4 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter C for customer programmable curve for step 4 |
| tPRCrv4 | 0.005 – 3.000 | – | 0.001 | 0.500 | Parameter PR for customer programmable curve for step 4 |
| tTRCrv4 | 0.005 – 100.000 | – | 0.001 | 13.500 | Parameter TR for customer programmable curve for step 4 |
| tCRCrv4 | 0.1 – 10.0 | – | 0.1 | 1.0 | Parameter CR for customer programmable curve for step 4 |
| HarmBlock4 | Off On |
– | – | Off | Enable block of step 4 from harmonic restrain |
OC4PTOC Non group settings (basic)
| OC4PTOC Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| MeasType | DFT RMS |
– | – | DFT | Selection between DFT and RMS measurement |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
OC4PTOC Monitored data
| OC4PTOC Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| DIRL1 | INTEGER | 1=Forward 2=Reverse 0=No direction |
– | Direction for phase1 |
| DIRL2 | INTEGER | 1=Forward 2=Reverse 0=No direction |
– | Direction for phase2 |
| DIRL3 | INTEGER | 1=Forward 2=Reverse 0=No direction |
– | Direction for phase3 |
| IL1 | REAL | – | A | Current in phase L1 |
| IL2 | REAL | – | A | Current in phase L2 |
| IL3 | REAL | – | A | Current in phase L3 |
Logics & highlights
Functional overview of OC4PTOC
Directional characteristic of the phase overcurrent protection
Simplified logic diagram for OC4PTOC
OC4 directional release block diagram
Logic for limitation of used operation current value
Second harmonic blocking
Code description for STDIRCND output signal
| Code description for STDIRCND output signal | |
| STDIRCND | Description |
| bit 0 (1) | General start |
| bit 1 (2) | Direction detected in forward |
| bit 2 (4) | Direction detected in reverse |
| bit 3 (8) | Start in phase L1 |
| bit 4 (16) | Forward direction detected in phase L1 |
| bit 5 (32) | Reverse direction detected in phase L1 |
| bit 6 (64) | Start in phase L2 |
| bit 7 (128) | Forward direction detected in phase L2 |
| bit 8 (256) | Reverse direction detected in phase L2 |
| bit 9 (512) | Start in phase L3 |
| bit 10 (1024) | Forward direction detected in phase L3 |
| bit 11 (2048) | Reverse direction detected in phase L3 |