ABB REG650 Technical Manual page 572

Section 20
Time inverse characteristics
566
Table 482: IEC Inverse time characteristics
Function
Operating characteristic:
æ ö
A
ç ÷
= ×
t k
( )
ç ÷
P
-
è ø
I 1
EQUATION1251-SMALL V1 EN
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 483: RI and RD type inverse time characteristics
Function
RI type inverse characteristic
1
= ×
t k
0.236
-
0.339
I
EQUATION1137-SMALL V1 EN
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
I = I /I
measured set
Range or value
k = (0.05-999) in steps of 0.01
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
k = (0.05-999) in steps of 0.01
k = (0.05-999) in steps of 0.01
1MRK 502 034-UEN -
Accuracy
-
IEC 60255-151, class 5
+ 40 ms
Accuracy
IEC 60255-151, class 5
+ 40 ms
IEC 60255-151, class 5
+ 40 ms
Technical Manual