ABB RELION RED670 Series Product Manual page 135

Line differential protection RED670 2.2
Product version: 2.2
Table 186. IEC Inverse time characteristics for Line differential 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 187. 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
ABB
Range or value
0.05 ≤ k ≤ 1.10
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 = (0.05-1.10) 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 ≤ 999.00
1.5 x I ≤ I ≤ 20 x I
set set
1MRK 505 379-BEN C
Accuracy
IEC 60255-151, ±5.0%
or ±40 ms whichever is
greater
Accuracy
IEC 60255-151, ±2.0%
or ±40 ms whichever is
greater
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