Table 161. High-impedance differential protection (HIxPDIF)
Characteristic Value
Operation accuracy Depending on the frequency of the current measured: 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
Start value
8 ms 11 ms 19 ms
I
Fault
= 10 × set
Start value
7 ms 9 ms 11 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
1)
Measurement mode
= default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, fault current in one phase with nominal frequency injected from random phase angle, results based
on statistical distribution of 1000 measurements
2) Measured with static signal output (SSO)
Table 162. High-impedance differential protection (HIxPDIF) main settings
Parameter
Function Value (Range) Step
Operate value HIxPDIF 1.0...200.0 %I
n
1.0
Minimum operate time HIxPDIF 20...300000 ms 10
Table 163. Circuit breaker failure protection (CCBRBRF)
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
Operate time accuracy ±1.0% of the set value or ±20 ms
Reset time Typically 40 ms
Retardation time <20 ms
Table 164. Circuit breaker failure protection (CCBRBRF) main settings
Parameter
Function Value (Range) Step
Current value CCBRBRF 0.05...2.00 × I
n
0.01
Current value Res CCBRBRF 0.05...2.00 × I
n
0.01
CB failure trip mode CCBRBRF 1 = 2 out of 4
2 = 1 out of 3
3 = 1 out of 4
-
CB failure mode CCBRBRF 1 = Current
2 = Breaker status
3 = Both (AND)
-1 = Both (OR)
-
Retrip time CCBRBRF 0...60000 ms 10
CB failure delay CCBRBRF 0...60000 ms 10
CB fault delay CCBRBRF 0...60000 ms 10
1MRS759144 A
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