Table 222. IEC Inverse time characteristics for Line Differential protection
Function
Range or value
Accuracy
Operating characteristic:
(
)
1
=
×
-
æ
ö
ç
÷
ç
÷
è
ø
P
A
t
k
I
EQUATION1251-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-2.00) in steps of 0.01
IEC 60255-151, ± 5.0%
or ± 40 ms whichever is
greater
IEC Normal Inverse
A=0.14, P=0.02
IEC Very inverse
A=13.5, P=1.0
IEC Inverse
A=0.14, P=0.02
IEC Extremely inverse
A=80.0, P=2.0
IEC Short time inverse
A=0.05, P=0.04
IEC Long time inverse
A=120, P=1.0
Programmable characteristic
Operate characteristic:
(
)
=
+
×
-
æ
ö
ç
÷
ç
÷
è
ø
P
A
t
B
k
I
C
EQUATION1370-SMALL V1 EN-US
Reset characteristic:
(
)
=
×
-
PR
TR
t
k
I
CR
EQUATION1253-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-999) in steps of 0.01
A=(0.005-200.000) in steps of 0.001
B=(0.00-20.00) in steps of 0.01
C=(0.1-10.0) in steps of 0.1
P=(0.005-3.000) in steps of 0.001
TR=(0.005-100.000) in steps of 0.001
CR=(0.1-10.0) in steps of 0.1
PR=(0.005-3.000) in steps of 0.001
The parameter setting
Characterist1 and 4
/
Reserved
shall not be used, since this
parameter setting is for future use and not
implemented yet.
Table 223. RI and RD type inverse time characteristics for Line Differential protection
Function
Range or value
Accuracy
RI type inverse characteristic
1
0.236
0.339
=
×
-
t
k
I
EQUATION1137-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-2.00) in steps of 0.01
IEC 60255-151, ± 5.0%
or ± 40 ms whichever is
greater
RD type logarithmic inverse characteristic
5.8
1.35
=
-
×
æ
ö
ç
÷
è
ø
t
I
In
k
EQUATION1138-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-999) in steps of 0.01
Line differential protection RED670
1MRK 505 379-BEN R
Version 2.2
Hitachi Energy
161
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание Relion 670 Series
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