Hitachi Relion 670 Series Product Manual page 84

Line differential protection RED670
Version 2.2
Table 38. Line differential protection L3CPDIF, L6CPDIF, LT3CPDIF , LT6CPDIF with 64 Kbit/s communication
Function
Minimum operate current
SlopeSection2
SlopeSection3
EndSection 1
EndSection 2
Unrestrained limit function
Second harmonic blocking
Fifth harmonic blocking
*Inverse characteristics, see table
216,218 and table 220
Critical impulse time
Charging current compensation
LT3CPDIF and LT6CPDIF (With in-zone transformer enabled and tIdMinHigh set to 0) :
*Operate time, restrained function at 0 to
10 x I
dMin
*Reset time, restrained function at 10 x
I to 0
dMin
*Operate time, unrestrained function at 0
to 10 x I
dUnre
*Reset time, unrestrained function at 10
x I to 0
dUnre
**Operate time, unrestrained negative
sequence function
**Reset time, unrestrained negative
sequence function
L3CPDIF and L6CPDIF (With tIdMinHigh set to 0):
*Operate time, restrained function at 0 to
10 x I
dMin
*Reset time, restrained function at 10 x
I to 0
dMin
*Operate time, unrestrained function at 0
to 10 x I
dUnre
*Reset time, unrestrained function at 10
x I to 0
dUnre
84
Range or value
(20-200)% of IBase
(10.0-50.0)%
(30.0-100.0)%
(20–150)% of IBase
(100–1000)% of IBase
(100–5000)% of IBase
(5.0–100.0)% of fundamental
(5.0–100.0)% of fundamental
16 curve types
2 ms typically at 0 to 10 x I
dMin
On/Off
Min. = 30 ms
Max. = 50 ms
Min. = 10 ms
Max. = 25 ms
Min. = 10 ms
Max. = 25 ms
Min. = 20 ms
Max. = 40 ms
Min. = 15 ms
Max. = 35 ms
Min. = 20 ms
Max. = 35 ms
Min. = 10 ms
Max. = 35 ms
Min. = 20 ms
Max. = 45 ms
Min. = 10 ms
Max. = 25 ms
Min. = 20 ms
Max. = 50 ms
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Accuracy
±4.0% of I at I ≤ I
r r
±4.0% of I at I > I
r
-
-
-
-
±4.0% of I at I ≤ I
r r
±4.0% of I at I > I
r
±3.0% of I
r
Note: fundamental magnitude = 100% of I
±10.0% of I
r
Note: fundamental magnitude = 100% of I
See table 216,218 and table 220
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-
-
-
-
-
-
-
-
-
-
-
1MRK 505 379-BEN R
r
r
Hitachi Energy