ABB RELION 615 Series Product Manual page 43

Transformer Protection and Control
RET615
Product version: 5.0 FP1
Table 46. Stabilized restricted earth-fault protection (LREFPNDF) main settings
Parameter
Operate value
Minimum operate time
Restraint mode
Start value 2.H
Operation
Table 47. High-impedance based restricted earth-fault protection (HREFPDIF)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
1) Current before fault = 0.0 × I , f
n
2) Includes the delay of the signal output contact
Table 48. High-impedance based restricted earth-fault protection (HREFPDIF) main settings
Parameter
Operate value
Minimum operate time
Operation
Table 49. Circuit breaker failure protection (CCBRBRF)
Characteristic
Operation accuracy
Operate time accuracy
Reset time
Retardation time
ABB
Function
LREFPNDF
LREFPNDF
LREFPNDF
LREFPNDF
LREFPNDF
Operate value
I = 2.0 × set
Fault
Operate value
I = 10.0 × set
Fault
= 50 Hz
n
Function
HREFPDIF
HREFPDIF
HREFPDIF
Value (Range)
5...50 %I
n
40...300000 ms
1 = None
2 = Harmonic2
10...50%
1 = on
5 = off
Value
At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
Typically 22 ms (±5 ms)
Typically 15 ms (±5 ms)
<60 ms
Typically 0.96
<60 ms
±1.0% of the set value or ±20 ms
Value (Range)
1.0...50.0%I
n
40...300000 ms
1 = on
5 = off
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × I
±1.0% of the set value or ±20 ms
Typically 40 ms
<20 ms
1MRS756891 M
Step
1
1
-
1
-
n
Step
0.1
1
-
±2 Hz
n
n
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