Impedance Protection; Phase Distance Protection 21P; Identification - ABB RELION 620 Series Technical Manual

Section 4
Protection functions
4.7
4.7.1
4.7.1.1
488
Characteristic
Reset ratio
Retardation time
Trip time accuracy in definite time mode
1) Measurement mode = default (depends on stage), current before fault = 0.0 × I
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact

Impedance protection

Phase distance protection 21P

Identification

This function is available in REM620 Ver.2.1 only.
Function description
Phase distance protection
Value
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
IEC 61850 IEC 60617
identification identification
PHDSTPDIS Z<
1MAC504801-IB E
, f = 50 Hz, fault current with
n n
ANSI/IEEE C37.2
device number
21P
620 series ANSI
Technical Manual