Table 39. Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF , LT6CPDIF with 2 Mbits/s communication
Function
Range or value
Accuracy
Minimum operate current
(20-200)% of
IBase
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
SlopeSection2
(10.0-50.0)%
-
SlopeSection3
(30.0-100.0)%
-
EndSection 1
(20–150)% of
IBase
-
EndSection 2
(100–1000)% of
IBase
-
Unrestrained limit function
(100–5000)% of
IBase
±1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Second harmonic blocking
(5.0–100.0)% of fundamental
±1.0% of I
r
Note: fundamental magnitude = 100% of I
r
Fifth harmonic blocking
(5.0–100.0)% of fundamental
±3.0% of I
r
Note: fundamental magnitude = 100% of I
r
*Inverse characteristics, see table
16 curve types
and table
Critical impulse time
2 ms typically at 0 to 10 x I
dMin
-
Charging current compensation
On/Off
-
LT3CPDIF and LT6CPDIF (With in-zone transformer enabled and tIdMinHigh set to 0) :
*Operate time, restrained function at 0 to
10 x I
dMin
Min. = 25 ms
Max. = 40 ms
-
*Reset time, restrained function at 10 x
I
dMin
to 0
Min. = 5 ms
Max. = 20 ms
-
*Operate time, unrestrained function at 0
to 10 x I
dUnre
Min. = 5 ms
Max. = 20 ms
-
*Reset time, unrestrained function at 10
x I
dUnre
to 0
Min. = 15 ms
Max. = 35 ms
-
**Operate time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 25 ms
-
**Reset time, unrestrained negative
sequence function
Min. = 10 ms
Max. = 30 ms
-
L3CPDIF and L6CPDIF (With tIdMinHigh set to 0):
*Operate time, restrained function at 0 to
10 x I
dMin
Min. = 10 ms
Max. = 20 ms
-
*Reset time, restrained function at 10 x
I
dMin
to 0
Min. = 15 ms
Max. = 30 ms
-
*Operate time, unrestrained function at 0
to 10 x I
d
Min. = 5 ms
Max. = 20 ms
-
*Reset time, unrestrained function at 10
x I
dUnre
to 0
Min. = 15 ms
Max. = 35 ms
-
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
86
Hitachi Energy
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание Relion 670 Series
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