Overview
The “Generator stator overload protection”, is used to protect the stator winding against excessive temperature as a result of overcurrents. The functions operating characteristic is designed in accordance with the American standard IEEE-C50.13.
For more detailed information on “Generator stator overload 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 |
| Generator stator overload protection | GSPTTR | 49S |
Signals & Setting Parameters
GSPTTR function block
GSPTTR Input signals
| GSPTTR Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Current Group Connection |
| BLOCK | BOOLEAN | 0 | Block of function |
| SETLKOUT | BOOLEAN | 0 | Input for forcing the output LOCKOUT |
| RSTLKOUT | BOOLEAN | 0 | Reset of the output LOCKOUT and theta to 0% |
GSPTTR Output signals
| GSPTTR Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | General trip signal from the function | |
| START | BOOLEAN | General start signal from the function | |
| LOCKOUT | BOOLEAN | Trip lockout output (latched) | |
| BLKRECL | BOOLEAN | Block machine closing command | |
GSPTTR Group settings (basic)
| GSPTTR Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| I> | 105.0 – 900.0 | % | 0.1 | 110.0 | Current pickup value for overload protection |
| ReclsLevTheta | 1.0 – 100.0 | % | 0.1 | 70.0 | Level for theta in percent below which the generator can be reconnected to grid |
| k1 | 1.00 – 200.00 | s | 0.01 | 37.50 | Time multiplier for thermal charact. operate time delay |
| AutoLockout | Off On |
– | – | Off | Auto lockout enables activation of LOCKOUT when TRIP is set |
| tPulse | 0.5 – 10.0 | s | 0.1 | 1.0 | Minimum pulse length of the trip signal |
| tMin | 1.0 – 120.0 | s | 0.1 | 10.0 | Minimum time, used in operate characteristic |
| tMax | 100.0 – 2000.0 | s | 0.1 | 300.0 | Maximum time, used in operate characteristic |
| tCutOff | 10.0 – 2000.0 | s | 0.1 | 120.0 | Cut-off time, used in operate characteristic |
| tReset | 10.0 – 2000.0 | s | 0.1 | 120.0 | Time required for Theta to reset from 100% to 0% |
GSPTTR Group settings (advanced)
| GSPTTR Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| PosSeqFactor | 0.0 – 10.0 | – | 0.1 | 1.0 | Weighting factor for the positive sequence current |
| NegSeqFactor | 0.0 – 10.0 | – | 0.1 | 6.0 | Weighting factor for the negative sequence current |
GSPTTR Non group settings (basic)
| GSPTTR Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| MeasurCurrent | RMS PosSeqNegSeq |
– | – | RMS | Measured current quantity (RMS or weighted sum of positive and negative sequence) |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
GSPTTR Monitored data
| GSPTTR Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| IMEAS | REAL | – | A | Measured current, used for calculation of operate time |
| THETA | REAL | – | % | Overload in percent of set trip level (i.e. Trip=100%) |
Logics & highlights
Representation of the stator overload protection
Measurement of stator current
The weighted sum of positive and negative sequence stator currents
Operating characteristic for overload function
Operating principles of the stator overload function
Trip Lockout logic
