Hitachi Relion 670 Series Product Manual page 160

Line differential protection RED670
Version 2.2
Table 220. RI and RD type inverse time characteristics for Line differential 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
Table 221. ANSI Inverse time characteristics for Line Differential Protection
Function
Operating characteristic:
æ ö
A
ç ÷
= + ×
t B k
( )
ç ÷
-
P
I 1
è ø
EQUATION1249-SMALL V3 EN-US
Reset characteristic:
t r
= ×
t k
( )
2
-
I 1
EQUATION1250-SMALL V1 EN-US
I = I /I
measured set
ANSI Extremely Inverse
ANSI Very inverse
ANSI Normal Inverse
ANSI Moderately Inverse
ANSI Long Time Extremely Inverse
ANSI Long Time Very Inverse
ANSI Long Time Inverse
160
Range or value
0.05 ≤ k ≤ 1.10
GUID-771E5218-2913-4BB0-B1EE-2CA1E912AEAA v1
Range or value
k = (0.05-2.00) in steps of 0.01
A=28.2, B=0.1217, P=2.0 , tr=29.1
A=19.61, B=0.491, P=2.0 , tr=21.6
A=0.0086, B=0.0185, P=0.02, tr=0.46
A=0.0515, B=0.1140, P=0.02, tr=4.85
A=64.07, B=0.250, P=2.0, tr=30
A=28.55, B=0.712, P=2.0, tr=13.46
A=0.086, B=0.185, P=0.02, tr=4.6
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1MRK 505 379-BEN R
Accuracy
IEC 60255-151, ±5.0%
or ±40 ms whichever is
greater
Accuracy
ANSI/IEEE C37.112 , ±
5.0% or ± 40 ms
whichever is greater
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