ABB RELION REX640 - 4.3.5.13 Technical data; 4.3.6 High-impedance differential protection HIxPDIF (ANSI 87_A, 87_B, 87_C); 4.3.6.1 Identification

HREFPDIF Monitored data
Table 694: HREFPDIF Monitored data
Name Type Values (Range) Unit Description
START_DUR FLOAT32 0.00...100.00 % Ratio of start time / op-
erate time
HREFPDIF Enum
1=on
2=blocked
3=test
4=test/blocked
5=off
Status
4.3.5.13 Technical data
Table 695: 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
1, 2
Minimum Typical Maximum
I
Fault
= 2.0 × set Oper-
ate value
I
Fault
= 10.0 × set Op-
erate value
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
4.3.6 High-impedance differential protection HIxPDIF (ANSI
87_A, 87_B, 87_C)
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 1MRS759142 F
772 REX640
Technical Manual