Overview
The “Sensitive directional residual overcurrent and power protection (SDEPSDE)” function can be used to detect and give selective trip of phase-to-earth faults in high impedance earthed networks.
For more detailed information on “Sensitive directional residual overcurrent and power protection (SDEPSDE)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
SDEPSDE Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Sensitive directional residual over current and power protection | SDEPSDE | – | 67N |
Signals & Setting Parameters
SDEPSDE function block
SDEPSDE Input signals
| SDEPSDE Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Group signal for current |
| U3P | GROUP SIGNAL | – | Group signal for voltage |
| BLOCK | BOOLEAN | 0 | Blocks all the outputs of the function |
| BLKTR | BOOLEAN | 0 | Blocks the trip outputs of the function |
| BLKTRDIR | BOOLEAN | 0 | Blocks the directional operate outputs of the function |
| BLKNDN | BOOLEAN | 0 | Blocks the Non directional current residual outputs |
| BLKUN | BOOLEAN | 0 | Blocks the Non directional voltage residual outputs |
SDEPSDE Output signals
| SDEPSDE Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | General trip of the function | |
| TRDIRIN | BOOLEAN | Trip of the directional residual over current function | |
| TRNDIN | BOOLEAN | Trip of non directional residual over current | |
| TRUN | BOOLEAN | Trip of non directional residual over voltage | |
| START | BOOLEAN | General start of the function | |
| STDIRIN | BOOLEAN | Start of the directional residual over current function | |
| STNDIN | BOOLEAN | Start of non directional residual over current | |
| STUN | BOOLEAN | Start of non directional residual over voltage | |
| STFW | BOOLEAN | Start of directional function for a fault in forward direction | |
| STRV | BOOLEAN | Start of directional function for a fault in reverse direction | |
| STDIR | INTEGER | Direction of fault. A general signal common to all three mode of residual over current protection | |
| UNREL | BOOLEAN | Residual voltage release of operation of all directional modes | |
SDEPSDE Group settings (basic)
| SDEPSDE Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| OpMode | 3I0Cosfi 3I03U0Cosfi 3I0 and fi |
– | – | 3I0Cosfi | Selection of operation mode for protection |
| DirMode | Forward Reverse |
– | – | Forward | Direction of operation forward or reverse |
| RCADir | -179 – 180 | Deg | 1 | -90 | Relay characteristic angle RCA, in deg |
| RCAComp | -10.0 – 10.0 | Deg | 0.1 | 0.0 | Relay characteristic angle compensation |
| ROADir | 0 – 90 | Deg | 1 | 90 | Relay open angle ROA used as release in phase mode, in deg |
| INCosPhi> | 0.25 – 200.00 | %IB | 0.01 | 1.00 | Set level for 3I0cosFi, directional res over current in % of IBase |
| SN> | 0.25 – 200.00 | %SB | 0.01 | 10.00 | Set level for 3I03U0cosFi, starting inv time count in % of SBase |
| INDir> | 0.25 – 200.00 | %IB | 0.01 | 5.00 | Set level for directional residual over current prot in % of IBase |
| tDef | 0.000 – 60.000 | s | 0.001 | 0.100 | Definite time delay directional residual overcurrent, in sec |
| SRef | 0.03 – 200.00 | %SB | 0.01 | 10.00 | Reference value of res power for inverse time count in % of SBase |
| kSN | 0.00 – 2.00 | – | 0.01 | 0.10 | Time multiplier setting for directional residual power mode |
| OpINNonDir> | Off On |
– | – | Off | Operation of non-directional residual overcurrent protection |
| INNonDir> | 1.00 – 400.00 | %IB | 0.01 | 10.00 | Set level for non directional residual over current in % of IBase |
| tINNonDir | 0.000 – 60.000 | s | 0.001 | 1.000 | Time delay for non-directional residual over current, in sec |
| TimeChar | 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 |
– | – | IEC Norm. inv. | Operation curve selection for IDMT operation |
| tMin | 0.000 – 60.000 | s | 0.001 | 0.040 | Minimum operate time for IEC IDMT curves, in sec |
| kIN | 0.05 – 2.00 | – | 0.01 | 1.00 | IDMT time mult for non-dir res over current protection |
| OpUN> | Off On |
– | – | Off | Operation of non-directional residual overvoltage protection |
| UN> | 1.00 – 200.00 | %UB | 0.01 | 20.00 | Set level for non-directional residual over voltage in % of UBase |
| tUN | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay for non-directional residual over voltage, in sec |
| INRel> | 0.25 – 200.00 | %IB | 0.01 | 1.00 | Residual release current for all directional modes in % of IBase |
| UNRel> | 1.00 – 300.00 | %UB | 0.01 | 3.00 | Residual release voltage for all direction modes in % of UBase |
SDEPSDE Group settings (advanced)
| SDEPSDE Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| tReset | 0.000 – 60.000 | s | 0.001 | 0.040 | Time delay used for reset of definite timers, in sec |
| tPCrv | 0.005 – 3.000 | – | 0.001 | 1.000 | Setting P for customer programmable curve |
| tACrv | 0.005 – 200.000 | – | 0.001 | 13.500 | Setting A for customer programmable curve |
| tBCrv | 0.00 – 20.00 | – | 0.01 | 0.00 | Setting B for customer programmable curve |
| tCCrv | 0.1 – 10.0 | – | 0.1 | 1.0 | Setting C for customer programmable curve |
| ResetTypeCrv | Immediate IEC Reset ANSI reset |
– | – | IEC Reset | Reset mode when current drops off. |
| tPRCrv | 0.005 – 3.000 | – | 0.001 | 0.500 | Setting PR for customer programmable curve |
| tTRCrv | 0.005 – 100.000 | – | 0.001 | 13.500 | Setting TR for customer programmable curve |
| tCRCrv | 0.1 – 10.0 | – | 0.1 | 1.0 | Setting CR for customer programmable curve |
SDEPSDE Non group settings (basic)
| SDEPSDE Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Global base selection for function groups |
SDEPSDE Non group settings (advanced)
| SDEPSDE Non group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| RotResU | 0 deg 180 deg |
– | – | 180 deg | Setting for rotating polarizing quantity if necessary |
SDEPSDE Monitored data
| SDEPSDE Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| INCOSPHI | REAL | – | A | Magnitude of residual current along the polarizing quantity 3I0cos(Fi-RCA) |
| IN | REAL | – | A | Measured magnitude of the residual current 3I0 |
| UN | REAL | – | kV | Measured magnitude of the residual voltage 3U0 |
| SN | REAL | – | MVA | Measured magnitude of residual power 3I03U0cos(Fi-RCA) |
| ANG FI-RCA | REAL | – | deg | Angle between 3U0 and 3I0 minus RCA (Fi-RCA) |
Logics & highlights
RCADir set to 0°
RCADir set to -90°
Characteristic with ROADir restriction
Explanation of RCAComp
Example of characteristic
Simplified logical diagram of the sensitive earth fault current protection
