ABB REC670 Product Manual page 75

ABB
Bay control REC670
Pre-configured
Product version: 1.1
Table 91. Inverse time characteristics for Two step undervoltage protection (PUVM, 27)
Function
Type A curve:
k
=
t
æ ö
< -
U U
ç ÷
è ø
<
U
EQUATION1431-SMALL V1 EN
U< = U
set
U = UV
measured
Type B curve:
×
k 480
=
t
2.0
æ ö
< -
U U
ç × - ÷
32 0.5
è ø
<
U
EQUATION1432-SMALL V1 EN
U< = U
set
U = U
measured
Programmable curve:
é ù
ê ú
×
k A
ê ú
= +
t
ê ú
P
æ ö
< -
U U
ê ú
ç × - ÷
B C
ë è ø û
<
U
EQUATION1433-SMALL V1 EN
U< = U
set
U = U
measured
Range or value
k = (0.05-1.10) in steps of
0.01
(Equation 4)
k = (0.05-1.10) in steps of
0.01
+
0.055
(Equation 5)
k = (0.05-1.10) in steps of
0.01
A = (0.005-200.000) in steps
of 0.001
D
B = (0.50-100.00) in steps of
0.01
C = (0.0-1.0) in steps of 0.1
(Equation 6)
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
75