Overview
The “High impedance differential protection, single phase (HZPDIF)” function can be used when the involved CT cores have the same turns ratio and similar magnetizing characteristics.
For more detailed information on “High impedance differential protection, single phase (HZPDIF)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here .
HZPDIF Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| High impedance differential protection, single phase | HZPDIF | Id | 87 |
Signals & Setting Parameters
HZPDIF Function block
HZPDIF Input signals
| HZPDIF Input signals | |||
| Name | Type | Default | Description |
| ISI | GROUP SIGNAL | – | Single phase current input |
| BLOCK | BOOLEAN | 0 | Block of function |
| BLKTR | BOOLEAN | 0 | Block of trip |
HZPDIF Output signals
| HZPDIF Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Trip signal | |
| ALARM | BOOLEAN | Alarm signal | |
| MEASVOLT | REAL | Measured RMS voltage on CT secondary side | |
HZPDIF Group settings (basic)
| HZPDIF Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| U>Alarm | 5 – 500 | V | 1 | 10 | Alarm voltage level in volts on CT secondary side |
| tAlarm | 0.000 – 60.000 | s | 0.001 | 5.000 | Time delay to activate alarm |
| U>Trip | 10 – 900 | V | 1 | 100 | Operate voltage level in volts on CT secondary side |
| SeriesResistor | 50 – 20000 | Ohm | 1 | 250 | Value of series resistor in Ohms |
HZPDIF Monitored data
| HZPDIF Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| MEASVOLT | REAL | – | kV | Measured RMS voltage on CT secondary side |
Logics & highlights
HZPDIF scheme
Logic diagram for 1Ph High impedance differential protection HZPDIF
