ABB Relion 670 Series Product Manual page 133

Generator protection REG670
Version 2.2
Table 184. RI and RD type inverse time characteristics
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 185. ANSI Inverse time characteristics for Sensitive directional residual overcurrent and power 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
Hitachi Power Grids
Range or value
0.05 ≤ k ≤ 999.00
1.5 x I ≤ I ≤ 20 x I
set set
GUID-19F8E187-4ED0-48C3-92F6-0D9EAA2B39BB v4
Range or value
0.05 ≤ k ≤ 2.00
1.5 x I ≤ I ≤ 20 x I
set set
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
© Copyright 2017 Hitachi Power Grids. All rights reserved
1MRK 502 074-BEN M
Accuracy
IEC 60255-151, ±2.0%
or ±40 ms whichever is
greater
Accuracy
ANSI/IEEE C37.112 ,
±5.0% or ±160 ms
whichever is greater
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