ABB REC670 Product Manual page 77

ABB
Bay control REC670
Pre-configured
Product version: 1.1
Table 93. Inverse time characteristics for Two step residual overvoltage protection
(POVM, 59N)
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
Range or value
k = (0.05-1.10) in
steps of 0.01
(Equation 11)
k = (0.05-1.10) in
steps of 0.01
0.035
(Equation 12)
k = (0.05-1.10) in
steps of 0.01
0.035
(Equation 13)
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 14)
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
77