Overview
The “Automatic switch onto fault logic (ZCVPSOF)” is a function that gives an instantaneous trip when closing the breaker onto a fault. A dead-line detection check is provided to activate ZCVPSOF when the line is de-energized.
For more detailed information on “Automatic switch onto fault logic (ZCVPSOF)”, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
ZCVPSOF Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Automatic switch onto fault logic | ZCVPSOF | – | – |
Signals & Setting Parameters
ZCVPSOF function block
ZCVPSOF Input signals
| ZCVPSOF Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Current DFT |
| U3P | GROUP SIGNAL | – | Voltage DFT |
| BLOCK | BOOLEAN | 0 | Block of function |
| START_DLYD | BOOLEAN | 0 | Start from function to be accelerated with delay by SOTF |
| BC | BOOLEAN | 0 | External enabling of SOTF |
| ZACC | BOOLEAN | 0 | Distance zone to be accelerated by SOTF |
ZCVPSOF Output signals
| ZCVPSOF Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip output | |
ZCVPSOF Group settings (basic)
| ZCVPSOF Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| AutoInitMode | DLD disabled Voltage Current Current & Voltage |
– | – | DLD disabled | Automatic switch onto fault initialization |
| Mode | Impedance UILevel UILvl&Imp |
– | – | UILevel | Mode of operation of SOTF Function |
| IPh< | 1 – 100 | %IB | 1 | 20 | Current level for detection of dead line in % of IBase |
| UPh< | 1 – 100 | %UB | 1 | 70 | Voltage level for detection of dead line in % of UBase |
| tDuration | 0.000 – 60.000 | s | 0.001 | 0.020 | Time delay for UI detection (s) |
| tSOTF | 0.000 – 60.000 | s | 0.001 | 1.000 | Drop off delay time of switch onto fault function |
| tDLD | 0.000 – 60.000 | s | 0.001 | 0.200 | Delay time for activation of dead line detection |
| tOperate | 0.03 – 120.00 | s | 0.01 | 0.03 | Time delay to operate of switch onto fault function |
ZCVPSOF Non group settings (basic)
| ZCVPSOF 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 |
ZCVPSOF Monitored data
| ZCVPSOF Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| IL1 | REAL | – | A | Current in phase L1 |
| IL2 | REAL | – | A | Current in phase L2 |
| IL3 | REAL | – | A | Current in phase L3 |
| UL1 | REAL | – | kV | Voltage in phase L1 |
| UL2 | REAL | – | kV | Voltage in phase L2 |
| UL3 | REAL | – | kV | Voltage in phase L3 |
Logics & highlights
Simplified logic diagram for Automatic switch onto fault logic
