Overview
The “Voltage differential protection (VDCPTOV)” compares the voltages from two three phase sets of voltage transformers and has one sensitive alarm step and one trip step.
For more detailed information on “Voltage differential protection (VDCPTOV)”, 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 |
| Voltage differential protection | VDCPTOV | – | 60 |
Signals & Setting Parameters
VDCPTOV function block
VDCPTOV Input signals
| VDCPTOV Input signals | |||
| Name | Type | Default | Description |
| U3P1 | GROUP SIGNAL | – | Bus voltage |
| U3P2 | GROUP SIGNAL | – | Capacitor voltage |
| BLOCK | BOOLEAN | 0 | Block of function |
VDCPTOV Output signals
| VDCPTOV Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Voltage differential protection operated | |
| START | BOOLEAN | Start of voltage differential protection | |
| ALARM | BOOLEAN | Voltage differential protection alarm | |
| U1LOW | BOOLEAN | Loss of U1 voltage | |
| U2LOW | BOOLEAN | Loss of U2 voltage | |
| UL1DIFF | REAL | Differential Voltage phase L1 | |
| UL2DIFF | REAL | Differential Voltage phase L2 | |
| UL3DIFF | REAL | Differential Voltage phase L3 | |
VDCPTOV Group settings (basic)
| VDCPTOV Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off/On |
| BlkDiffAtULow | No Yes |
– | – | Yes | Block operation at low voltage |
| UDTrip | 2.0 – 100.0 | %UB | 0.1 | 5.0 | Operate level, in % of UBase |
| tTrip | 0.000 – 60.000 | s | 0.001 | 1.000 | Time delay for voltage differential operate, in seconds |
| tReset | 0.000 – 60.000 | s | 0.001 | 0.000 | Time delay for voltage differential reset, in seconds |
| UDAlarm | 2.0 – 100.0 | %UB | 0.1 | 2.0 | Alarm level, in % of UBase |
| tAlarm | 0.000 – 60.000 | s | 0.001 | 2.000 | Time delay for voltage differential alarm, in seconds |
| U1Low | 1.0 – 100.0 | %UB | 0.1 | 70.0 | Input 1 undervoltage level, in % of UBase |
| U2Low | 1.0 – 100.0 | %UB | 0.1 | 70.0 | Input 2 undervoltage level, in % of UBase |
| tBlock | 0.000 – 60.000 | s | 0.001 | 0.000 | Reset time for undervoltage block |
VDCPTOV Group settings (advanced)
| VDCPTOV Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| RFL1 | 0.000 – 3.000 | – | 0.001 | 1.000 | Ratio compensation factor phase L1 U2L1*RFL1=U1L1 |
| RFL2 | 0.000 – 3.000 | – | 0.001 | 1.000 | Ratio compensation factor phase L2 U2L2*RFL2=U1L2 |
| RFL3 | 0.000 – 3.000 | – | 0.001 | 1.000 | Ratio compensation factor phase L3 U2L3*RFL3=U1L3 |
VDCPTOV Non group settings (basic)
| VDCPTOV 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 |
VDCPTOV Monitored data
| VDCPTOV Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| UL1DIFF | REAL | – | kV | Differential Voltage phase L1 |
| UL2DIFF | REAL | – | kV | Differential Voltage phase L2 |
| UL3DIFF | REAL | – | kV | Differential Voltage phase L3 |
Logics & highlights
Principle logic for Voltage differential function VDCPTOV
