ABB REC670 Product Manual page 76

Bay control REC670
Pre-configured
Product version: 1.1
Table 92. Inverse time characteristics for Two step overvoltage protection (POVM, 59)
Function
Type A curve:
k
=
t
æ ö
- >
U U
ç ÷
è ø
>
U
EQUATION1436-SMALL V1 EN
U> = U
set
U = U
measured
Type B curve:
×
k 480
=
t
2.0
æ ö
- >
U U
ç × - ÷
32 0.5
è ø
>
U
EQUATION1437-SMALL V1 EN
Type C curve:
×
k 480
=
t
3.0
æ ö
- >
U U
ç × - ÷
32 0.5
è ø
>
U
EQUATION1438-SMALL V1 EN
Programmable curve:
×
k A
= +
t D
P
æ ö
- >
U U
ç × - ÷
B C
è ø
>
U
EQUATION1439-SMALL V1 EN
76
Range or value
k = (0.05-1.10) in steps of
0.01
(Equation 7)
k = (0.05-1.10) in steps of
0.01
-
0.035
(Equation 8)
k = (0.05-1.10) in steps of
0.01
-
0.035
(Equation 9)
k = (0.05-1.10) in steps of
0.01
A = (0.005-200.000) in steps
of 0.001
B = (0.50-100.00) in steps of
0.01
(Equation 10)
C = (0.0-1.0) in steps of 0.1
D = (0.000-60.000) in steps
of 0.001
P = (0.000-3.000) in steps of
0.001
1MRK 511 192-BEN B
Issued: June 2010
Accuracy
Class 5 +40 ms
ABB