ABB RED650 Technical Manual page 890

Section 25
Inverse time characteristics
884
Table 670: IEC Inverse time characteristics for Sensitive directional residual overcurrent and
power 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
The parameter setting Characterist1 and 4/Reserved shall not be
used, since this parameter setting is for future use and not
implemented yet.
Range or value
0.10 ≤ k ≤ 2.00
1.5 x I ≤ I ≤ 20 x I
set set
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 = (0.05-999) 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
Line differential protection RED650 2.2 IEC
1MRK 505 394-UEN A
Accuracy
IEC 60255-151, ±5.0%
or ±160 ms whichever
is greater
Technical manual