ABB Relion REL650 Series Product Manual page 106

Line distance protection REL650
Version 2.2
Table 159. 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
Table 160. RI and RD type inverse time characteristics for Sensitive directional residual overcurrent and power protection
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
106
Range or value
0.05 ≤ 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
Range or value
0.05 ≤ k ≤ 2.00
1.5 x I ≤ I ≤ 20 x I
set set
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