ABB RED650 - Page 888

Table 667: IEC Inverse time characteristics for Line Differential protection
Function Range or value Accuracy
Operating characteristic:
( )
1
= ×
-
æ ö
ç ÷
ç ÷
è ø
P
A
t k
I
EQUATION1251-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-2.00) in steps of
0.01
IEC 60255-151, ± 5.0%
or ± 40 ms whichever is
greater
IEC Normal Inverse A=0.14, P=0.02
IEC Very inverse A=13.5, P=1.0
IEC Inverse A=0.14, P=0.02
IEC Extremely inverse A=80.0, P=2.0
IEC Short time inverse A=0.05, P=0.04
IEC Long time inverse A=120, P=1.0
Programmable characteristic
Operate characteristic:
( )
= + ×
-
æ ö
ç ÷
ç ÷
è ø
P
A
t B k
I C
EQUATION1370-SMALL V1 EN-US
Reset characteristic:
( )
= ×
-
PR
TR
t k
I CR
EQUATION1253-SMALL V1 EN-US
I = I
measured
/I
set
k = (0.05-999) 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
The parameter setting Characterist1 and 4/Reserved shall not be
used, since this parameter setting is for future use and not
implemented yet.
Table 668: RI and RD type inverse time characteristics for Line Differential protection
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
k = (0.05-2.00) in steps of
0.01
IEC 60255-151, ± 5.0%
or ± 40 ms whichever is
greater
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
k = (0.05-999) in steps of 0.01
Section 25 1MRK 505 394-UEN A
Inverse time characteristics
882 Line differential protection RED650 2.2 IEC
Technical manual