VAMP 257
Feeder and motor manager
Technical description
VAMP Ltd
60
VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
Figure 2.3.17-3 shows the functional block diagram of the
overvoltage function stages U>, U>> and U>>>.
Figure 2.3.17-3. Block diagram of the three-phase overvoltage stages U>,
U>> and U>>>
Setting parameters of overvoltage stages:
U>, U>>, U>>> (59)
Parameter Value
Unit Default
Description
U>, U>>,
U>>>
50 … 150 (U>,
U>>)
50 … 160
(U>>>)
%Un 120 (U>)
130
(U>>, U>>>)
Overvoltage setting
t>, t>>,
t>>>
0.08 … 300.0
(U>,U>>)
0.06 … 300.00
(U>>>)
s 0.20
(U>)
0.10
(U>>, U>>>)
Definite operation
time
ReleaseDly 0.06 … 300.0
s
-
Release delay [s]
(only U>)
Hysteresis 0.1 … 20.0
%
-
Deadband (only U>)
S_On
Enabled;
Disabled
- Enabled Start
on
event
S_Off
Enabled;
Disabled
-
Enabled
Start off event
T_On
Enabled;
Disabled
- Enabled Trip
on
event
T_Off
Enabled;
Disabled
-
Enabled
Trip off event
Measured and recorded values of overvoltage stages:
U>, U>>, U>>> (59)
Parameter Value Unit Description
Measured
value
Umax
V
Maximum value of line voltages
SCntr
-
Start counter (Start) reading
TCntr
-
Trip counter (Trip) reading
Flt
%U
n
The max. fault value
Recorded
values
EDly
%
Elapsed time as compared to
the set operating time; 100% =
tripping
