Overview
The “Low active power and power factor protection” function measures power flow. It can be used for protection and monitoring of phase wise low active power, phase wise low power factor and phase wise reactive power and apparent power as service values.
For more detailed information on “Low active power and power factor protection” 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 |
| Low active power and power factor protection | LAPPGAPC | – | 37_55 |
Signals & Setting Parameters
LAPPGAPC function block
LAPPGAPC Input signals
| LAPPGAPC Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Three phase group signal for current |
| U3P | GROUP SIGNAL | – | Three phase group signal for voltage |
| BLOCK | BOOLEAN | 0 | Block of function |
| BLKTR | BOOLEAN | 0 | Block all trip signals of the funtction |
LAPPGAPC Output signals
| LAPPGAPC Output signals | |||
| Name | Type | Description | |
| TRLAP | BOOLEAN | Trip low active power | |
| TRLPF | BOOLEAN | Trip low power factor | |
| TRLPFL1 | BOOLEAN | Trip low power factor phase 1 | |
| TRLPFL2 | BOOLEAN | Trip low power factor phase 2 | |
| TRLPFL3 | BOOLEAN | Trip low power factor phase 3 | |
| STLAP | BOOLEAN | Start low active power | |
| STLPF | BOOLEAN | Start low power factor | |
| STLAPL1 | BOOLEAN | Start low active power phase 1 | |
| STLAPL2 | BOOLEAN | Start low active power phase 2 | |
| STLAPL3 | BOOLEAN | Start low active power phase 3 | |
| STLPFL1 | BOOLEAN | Start low power factor phase 1 | |
| STLPFL2 | BOOLEAN | Start low power factor phase 2 | |
| STLPFL3 | BOOLEAN | Start low power factor phase 3 | |
LAPPGAPC Group settings (basic)
| LAPPGAPC Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off/On |
| OperationLAP | Off On |
– | – | Off | Operation low active power Off/On |
| OpMode | 2 out of 3 1 out of 3 |
– | – | 2 out of 3 | Trip mode low active power 2out of 3 or 1 out of 3 |
| LAP< | 2.0 – 100.0 | %SB | 0.1 | 5.0 | 3 Phase start value for low active power in % of SBase |
| tOpLAP | 0.000 – 60.000 | s | 0.001 | 0.010 | Time delay to operate for low active power |
| OperationLPF | Off On |
– | – | Off | Operation low power factor Off/On |
| LPF< | 0.00 – 1.00 | – | 0.01 | 0.40 | Start value for low power factor |
| tOpLPF | 0.000 – 60.000 | s | 0.001 | 0.010 | Time delay to operate for low power factor |
LAPPGAPC Group settings (advanced)
| LAPPGAPC Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| UGenZeroDb | 0.0 – 100.0 | %UB | 0.1 | 30.0 | Zero point Clamping in % of UBase |
| IGenZeroDb | 0.0 – 100.0 | %IB | 0.1 | 3.0 | Zero point clamping in % of IBase |
LAPPGAPC Non group settings (basic)
| LAPPGAPC 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 |
LAPPGAPC Monitored data
| LAPPGAPC Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| SL1 | REAL | – | MVA | Apparent power for phase 1 |
| SL2 | REAL | – | MVA | Apparent power for phase 2 |
| SL3 | REAL | – | MVA | Apparent power for phase 3 |
| PL1 | REAL | – | MW | Active power for phase 1 |
| PL2 | REAL | – | MW | Active power for phase 2 |
| PL3 | REAL | – | MW | Active power for phase 3 |
| QL1 | REAL | – | MVAr | Reactive power for phase 1 |
| QL2 | REAL | – | MVAr | Reactive power for phase 2 |
| QL3 | REAL | – | MVAr | Reactive power for phase 3 |
| PFL1 | REAL | – | – | Power factor phase 1 |
| PFL2 | REAL | – | – | Power factor phase 2 |
| PFL3 | REAL | – | – | Power factor phase 3 |
Logics & highlights
Active power calculation
Power factor calculation
Logic diagram of Low active power and low power factor protection (LAPPGAPC)
LAPPGAPC technical data
