ABB RELION 670 Series Technical Manual page 1395

1MRK 502 066-UUS B
Table 1077:IEC Inverse time characteristics
Function
Operating characteristic:
æ
ç
=
t
(
ç
è
I
EQUATION1653 V1 EN-US
I = I
measured
IEC Normal Inverse
IEC Very inverse
IEC Inverse
IEC Extremely inverse
IEC Short time inverse
IEC Long time inverse
Programmable characteristic
Trip characteristic:
æ
ç
=
t
(
ç
P
è
I
EQUATION1654 V1 EN-US
Reset characteristic:
=
t
(
PR
I
EQUATION1655 V1 EN-US
I = I
measured
Table 1078:RI and RD type inverse time characteristics
Function
RI type inverse characteristic
=
t
0.339
EQUATION1656 V1 EN-US
I = I
measured
RD type logarithmic inverse
characteristic
5.8
=
t
EQUATION1657 V1 EN-US
I = I
measured
Technical manual
ö
A
÷
×
td
)
÷
P
- ø
1
/I
set
ö
A
÷
+ ×
B td
)
÷
- ø
C
TR
×
td
)
-
CR
/I
set
The parameter setting
since this parameter setting is for future use and not implemented yet.
1
×
td
0.236
-
I
/I
set
æ ö
I
- ç × ÷
1.35 In
è ø
td
/I
set
Range or value
0.05 ≤ td ≤ 999.00
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
td = (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
Characteristn = Reserved (where, n = 1 - 4) shall not be used,
Range or value
0.05 ≤ td ≤ 999.00
1.5 x I ≤ I ≤ 20 x I
set set
Section 26
Inverse time characteristics
Accuracy
IEC 60255-151, ±2.0%
or ±40 ms whichever
is greater
Accuracy
IEC 60255-151, ±2.0%
or ±40 ms whichever
is greater
1389