ABB Relion 611 series REB611 Product Manual page 20

Busbar and Multipurpose Differential Protection and Control
REB611
Product version: 1.0
Protection functions
Table 26. High-impedance differential protection (HIPDIF)
Characteristic
Operation accuracy
1)2)
Start time
IFault = 2.0 x set
Start value
IFault= 10 x set Start
value
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
1) Measurement mode = default (depends on stage), current before fault = 0.0 x In, fn = 50 Hz, fault current with nominal frequency injected from
random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 27. High-impedance differential protection (HIPDIF) main settings
Parameter Values (Range)
Operate value 1...200
Minimum operate time 20...300000
20
Value
Depending on the frequency of the current measured: f
±1.5% of the set value or ±0.002 x In
Minimum Typical
12 ms 16 ms
10 ms 12 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
Unit Step Default
%In 1 5
ms 10 20
1MRS757467 B
±2 Hz
n
Maximum
24 ms
14 ms
Description
Operate value,
percentage of the
nominal current
Minimum operate
time
ABB