Hitachi Relion REL670 Product Manual page 101

Line distance protection REL670
Version 2.2
Table 69. Average Power Transient Earth Fault Protection APPTEF
Function
Minimum operate level for residual
overvoltage 3Uo> start condition "UN>"
Reset ratio for residual overvoltage 3Uo>
Operate time for residual overvoltage 3Uo>
at 0 to 2 x U
set
Minimum threshold level for residual
overcurrent start condition "IN>"
Minimum operate level for integrated current
to declare the forward direction
"IMinForward"
Minimum operate level for integrated current
to declare the reverse direction
"IMinReverse"
Minimum time delay to declare EF direction
"tStart"
Minimum trip time delay "tTrip"
Minimum pulse length duration for trip and/or
start outputs "tPulseMin"
Operate 3Io current level for cross country
fault detection "CrossCntry_IN>"
Time delay to activate cross country fault
detection "tCC" at 0 to 2 x I
set
Drop off time delay to de-activate cross
country fault detection at 2 x I
Operate 3Io current level for circulating
current detection "Circulate_IN>"
Time delay to activate circulating current
detection "tCircIN" at 0 to 2 x I
Drop off time delay to de-activate circulating
current detection at 2 x I
set
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GUID-BCCA5F2D-9FF7-4188-9B5D-DA05E8E80CC0 v1
Range or value
(5-80)% of UBase
> 75%
Min. = 5 ms
Max. = 15 ms
(3-100)% of lBase
(2.0-100.0)% of lBase
(2.0-100.0)% of lBase
(0.04-2.00) s
(0.00-20.00) s
(0.02-1.00) s
(20-1000)% of lBase
(0.02-1.00) s
Fixed 0.2 s
to 0
set
(2-200)% of lBase
(5.0-60.0) s
set
Fixed 0.5 s
to 0
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Accuracy
±0.5% of Ur
-
-
±1.5% of Ir
±1.5% of Ir
±1.5% of Ir
±0.2% or ±25 ms whichever is greater
±0.2% or ±25 ms whichever is greater
±0.2% or ±10 ms whichever is greater
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
±0.2% or ±25 ms whichever is greater
±0.2% or ±25 ms whichever is greater
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
±0.2% or ±25 ms whichever is greater
±0.2% or ±25 ms whichever is greater
1MRK 506 372-BEN Q
101