Overview
Negative sequence components are present in all types of fault condition. Negative sequence voltage and current get high values during unsymmetrical faults. The “Negative sequence over voltage protection” (LCNSPTOV) is a definite time stage comparator function.
For more detailed information on “Negative sequence overvoltage 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 |
| Negative sequence overvoltage protection | LCNSPTOV | – | 47 |
Signals & Setting Parameters
LCNSPTOV Function block
LCNSPTOV Input signals
| LCNSPTOV Input signals | |||
| Name | Type | Default | Description |
| U3P | GROUP SIGNAL | – | Three phase group signal for voltage inputs |
| BLOCK | BOOLEAN | 0 | Block overall function |
| BLKTR | BOOLEAN | 0 | Block trip output |
LCNSPTOV Output signals
| LCNSPTOV Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip signal for negative sequence over voltage | |
| START | BOOLEAN | Start signal for negative sequence over voltage | |
LCNSPTOV Group settings (basic)
| LCNSPTOV Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off/On |
| U2> | 1 – 200 | %UB | 1 | 10 | Negative sequence over voltage start value in % of UBase |
| tU2 | 0.000 – 120.000 | s | 0.001 | 2.000 | Time delay to operate |
LCNSPTOV Non group settings (basic)
| LCNSPTOV 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 |
LCNSPTOV Monitored data
| LCNSPTOV Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| U2 | Real | – | kV | Neagative sequence voltage value |
Technical Data
LCNSPTOV technical data
