ABB REG650 - Page 61

Table 76. RI and RD type inverse time characteristics
Function Range or value Accuracy
RI type inverse characteristic
1
0.236
0.339
= ×
-
t k
I
EQUATION1137-SMALL V1 EN
I = I
measured
/I
set
k = (0.05-999) in steps of 0.01
RD type logarithmic inverse characteristic
5.8 1.35= - ×
æ ö
ç ÷
è ø
t
I
In
k
EQUATION1138-SMALL V1 EN
I = I
measured
/I
set
k = (0.05-999) in steps of 0.01
Table 77. Inverse time characteristics for overvoltage protection
Function
Range or value Accuracy
Type A curve:
=
- >
>
æ ö
ç ÷
è ø
t
k
U U
U
EQUATION1436-SMALL V1 EN
U> = U
set
U = U
measured
k = (0.05-1.10) in steps of 0.01 ±5% +60 ms
Type B curve:
2.0
480
32 0.5 0.035
=
×
- >
× - -
>
æ ö
ç ÷
è ø
t
k
U U
U
EQUATION1437-SMALL V1 EN
k = (0.05-1.10) in steps of 0.01
Type C curve:
3.0
480
32 0.5 0.035
=
×
- >
× - -
>
æ ö
ç ÷
è ø
t
k
U U
U
EQUATION1438-SMALL V1 EN
k = (0.05-1.10) in steps of 0.01
Generator protection REG650
1MRK 502 050-BEN B
Product version: 1.3
ABB 61