Hitachi Relion REL670 Product Manual page 150

Line distance protection
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Line distance protection REL670
Version 2.2
Table 212. IEC Inverse time characteristics for Sensitive directional residual overcurrent and power protection
Function
Operating characteristic:
æ
ö
A
ç
÷
=
×
t
k
(
)
ç
÷
P
è
-
ø
I
1
EQUATION1251-SMALL V1 EN-US
I = I
/I
measured
set
IEC Normal Inverse
IEC Very inverse
IEC Inverse
IEC Extremely inverse
IEC Short time inverse
IEC Long time inverse
Programmable characteristic
Operate characteristic:
æ
ö
A
ç
÷
=
+
×
t
B
k
(
)
ç
÷
P
è
-
ø
I
C
EQUATION1370-SMALL V1 EN-US
Reset characteristic:
TR
=
×
t
k
(
)
PR
-
I
CR
EQUATION1253-SMALL V1 EN-US
I = I
/I
measured
set
Table 213. RI and RD type inverse time characteristics for Sensitive directional residual overcurrent and power protection
Function
RI type inverse characteristic
1
=
×
t
k
0.236
-
0.339
I
EQUATION1137-SMALL V1 EN-US
I = I
/I
measured
set
RD type logarithmic inverse characteristic
æ
ö
I
-
ç
×
÷
=
5.8
1.35
In
t
è
ø
k
EQUATION1138-SMALL V1 EN-US
I = I
/I
measured
set
150
Range or value
0.05 ≤ k ≤ 2.00
1.5 x I
≤ I ≤ 20 x I
set
set
A=0.14, P=0.02
A=13.5, P=1.0
A=0.14, P=0.02
A=80.0, P=2.0
A=0.05, P=0.04
A=120, P=1.0
k = (0.05-2.00) 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
Range or value
0.05 ≤ k ≤ 2.00
1.5 x I
≤ I ≤ 20 x I
set
set
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 506 372-BEN Q
Accuracy
IEC 60255-151, ±5.0%
or ±160 ms whichever is
greater
Accuracy
IEC 60255-151, ±5.0%
or ±160 ms whichever is
greater
Hitachi Energy

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