ABB REC650 Product Manual page 72

Bay control REC650
Product version: 1.1
Table 66. 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 67. 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
72
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 511 249-BEN -
Issued: February 2011
Accuracy
-
IEC 60255-151,
class 5 + 40 ms
Accuracy
IEC 60255-151,
class 5 + 40 ms
IEC 60255-151,
class 5 + 40 ms
ABB