ABB Relion 670 series, Technical Manual

Page: 1397 / 1432

Table
1080: IEC Inverse time characteristics for Sensitive directional residual overcurrent and power protection
Function Range or value Accuracy
Operating characteristic:
( )
= ×
-
æ ö
ç ÷
ç ÷
è ø
1
P
A
t td
I
EQUATION1653 V1 EN-US
I = I
measured
/I
set
0.05 ≤ k ≤ 2.00
1.5 x I
set
≤ I ≤ 20 x I
set
IEC 60255-151, ±5.0%
or ±160 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
Trip characteristic:
( )
= + ×
-
æ ö
ç ÷
ç ÷
è ø
P
A
t B td
I C
EQUATION1654 V1 EN-US
Reset characteristic:
( )
= ×
-
PR
TR
t td
I CR
EQUATION1655 V1 EN-US
I = I
measured
/I
set
td = (0.05-2.00) 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
TimeChar = Reserved shall not be used, since this parameter
setting is for future use and not implemented yet.
1MRK 502 066-UUS B Section 26
Inverse time characteristics
1391
Technical manual