Table 157. RI and RD type inverse time characteristics
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
0.05 ≤ k ≤ 999.00
1.5 x I
set
≤ I ≤ 20 x I
set
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
GUID-19F8E187-4ED0-48C3-92F6-0D9EAA2B39BB v5
Table 158. ANSI Inverse time characteristics for Sensitive directional residual overcurrent and power protection
Function
Range or value
Accuracy
Operating characteristic:
(
)
1
P
A
t
B
k
I
=
+
⋅
−
EQUATION1249-SMALL V3 EN-US
I = I
measured
/I
set
0.05 ≤ k ≤ 2.00
1.5 x I
set
≤ I ≤ 20 x I
set
ANSI Extremely Inverse
A=28.2, B=0.1217, P=2.0
ANSI Very inverse
A=19.61, B=0.491, P=2.0
ANSI Normal Inverse
A=0.0086, B=0.0185, P=0.02, tr=0.46
ANSI Moderately Inverse
A=0.0515, B=0.1140, P=0.02
Long Time Extremely Inverse
A=64.07, B=0.250, P=2.0
Long Time Very Inverse
A=28.55, B=0.712, P=2.0
Long Time Inverse
A=0.086, B=0.185, P=0.02
Line distance protection REL650
1MRK 506 384-BEN H
Version 2.2
Hitachi Power Grids
105
© 2017 - 2021 Hitachi Power Grids. All rights reserved
Содержание REL650 series
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