Overview
Inadvertent or accidental energizing of off-line generators has occurred often enough due to operating errors, breaker head flashovers, control circuit malfunctions, or a combination of these causes. Inadvertently energized generator operates as induction motor drawing a large current from the system. The voltage supervised overcurrent protection is used to detect the inadvertently energized generator. “Accidental energizing protection for synchronous generator” takes the maximum phase current input and maximum phase to phase voltage inputs from the terminal side.
For more detailed information on “Accidental energizing protection for synchronous generator” 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 |
| Accidental energizing protection for synchronous generator | AEGPVOC | U < I > | 50AE |
Signals & Setting Parameters
AEGPVOC Function block
AEGPVOC Input signals
| AEGPVOC Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Three Phase Current input |
| U3P | GROUP SIGNAL | – | Three Phase Voltage input |
| BLOCK | BOOLEAN | 0 | Block of function |
| BLKTR | BOOLEAN | 0 | Block of trip |
AEGPVOC Output signals
| AEGPVOC Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip signal from accidental energizing of generator protection | |
| START | BOOLEAN | Start signal from accidental energizing of generator protection | |
| ARMED | BOOLEAN | True when accidental energizing of generator protection is armed | |
AEGPVOC Group settings (basic)
| AEGPVOC Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| I> | 5 – 900 | %IB | 1 | 120 | Operate phase current level in % of IBase |
| tOC | 0.000 – 60.000 | s | 0.001 | 0.030 | Trip time delay for over current level |
| ArmU< | 2 – 150 | %UB | 1 | 50 | Under-voltage level to arm protection in % of UBase |
| tArm | 0.000 – 60.000 | s | 0.001 | 5.000 | Time delay to arm protection with U< level |
| DisarmU> | 2 – 200 | %UB | 1 | 80 | Over-voltage level to disarm protection in % of UBase |
| tDisarm | 0.000 – 60.000 | s | 0.001 | 0.500 | Time delay to disarm protection with U> level |
AEGPVOC Non group settings (basic)
| AEGPVOC 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 |
AEGPVOC Monitored data
| AEGPVOC Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| IMAX | REAL | – | A | Maximum value of current |
| UMAX | REAL | – | kV | Maximum value of phase to phase voltage |
Logics & highlights
AEGPVOC logic diagram
