ABB Relion 620 Series, Technical Manual, Page: 582 / 1224

4.3.4.12 Technical data
Table 508: HREFPDIF Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: f
n
±2
Hz
±1.5% of the set value or ±0.002 × I
n
Start time ,
Minimum Typical Maximum
I
Fault
= 2.0 × set Operate value
I
Fault
= 10.0 × set Operate val-
ue
16 ms
11 ms 21 ms
13 ms 23 ms
14 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
4.3.4.13 Technical revision history
Table 509: HREFPDIF Technical revision history
Technical revision Change
B Internal improvement.
C Internal improvement.
4.3.5 High-impedance differential protection HIxPDIF
4.3.5.1 Identification
Function description IEC 61850
identification IEC 60617
identification ANSI/IEEE C37.2
device number
High-impedance differential pro-
tection for phase A HIAPDIF dHi_A> 87A
High-impedance differential pro-
tection for phase B HIBPDIF dHi_B> 87B
High-impedance differential pro-
tection for phase C HICPDIF dHi_C> 87C
1
Current before fault = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000 measure-
ments.
2
Includes the delay of the signal output contact.
Protection functions 1MRS757644 H
582 620 series
Technical Manual