GUID-BCCA5F2D-9FF7-4188-9B5D-DA05E8E80CC0 v1
Table 74. Average Power Transient Earth Fault Protection APPTEF
Function
Range or value
Accuracy
Minimum operate level for residual
overvoltage 3Uo> start condition "UN>"
(5-80)% of UBase
±0.5% of Ur
Reset ratio for residual overvoltage 3Uo>
> 75%
-
Operate time for residual overvoltage 3Uo>
at 0 to 2 x U
set
Min. = 5 ms
Max. = 15 ms
-
Minimum threshold level for residual
overcurrent start condition "IN>"
(3-100)% of lBase
±1.5% of Ir
Minimum operate level for integrated current
to declare the forward direction
"IMinForward”
(2.0-100.0)% of lBase
±1.5% of Ir
Minimum operate level for integrated current
to declare the reverse direction
"IMinReverse"
(2.0-100.0)% of lBase
±1.5% of Ir
Minimum time delay to declare EF direction
"tStart"
(0.04-2.00) s
±0.2% or ±25 ms whichever is greater
Minimum trip time delay "tTrip"
(0.00-20.00) s
±0.2% or ±25 ms whichever is greater
Minimum pulse length duration for trip and/or
start outputs "tPulseMin"
(0.02-1.00) s
±0.2% or ±10 ms whichever is greater
Operate 3Io current level for cross country
fault detection "CrossCntry_IN>"
(20-1000)% of lBase
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
Time delay to activate cross country fault
detection "tCC" at 0 to 2 x I
set
(0.02-1.00) s
±0.2% or ±25 ms whichever is greater
Drop off time delay to de-activate cross
country fault detection at 2 x I
set
to 0
Fixed 0.2 s
±0.2% or ±25 ms whichever is greater
Operate 3Io current level for circulating
current detection "Circulate_IN>"
(2-200)% of lBase
±1.0% of Ir at I ≤ Ir
±1.0% of I at I > Ir
Time delay to activate circulating current
detection "tCircIN" at 0 to 2 x I
set
(5.0-60.0) s
±0.2% or ±25 ms whichever is greater
Drop off time delay to de-activate circulating
current detection at 2 x I
set
to 0
Fixed 0.5 s
±0.2% or ±25 ms whichever is greater
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
111
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание Relion 670 Series
Страница 1: ...Relion 670 SERIES Line differential protection RED670 Version 2 2 Product guide ...
Страница 191: ...191 ...