VAMP 257
Feeder and motor manager
Technical description
VAMP Ltd
28
VAMP 24h support phone : +358 (0)20 753 3264
VM257.EN002
Here is an example configuration of curve points:
Current I/I
pickup
Operation Delay
1
1.00 10.00
s
2
2.00 6.50
s
3
5.00 4.00
s
4
10.00 3.00
s
5
20.00 2.00
s
6
40.00 1.00
s
7
1.00 0.00
s
8
1.00 0.00
s
9
1.00 0.00
s
10
1.00 0.00
s
11
1.00 0.00
s
12
1.00 0.00
s
13
1.00 0.00
s
14
1.00 0.00
s
15
1.00 0.00
s
16
1.00 0.00
s
If there are any errors on configuration of the curve points, the
protection stage will use definite time delay. There is also a
signal ‘Setting Error’ available in output matrix, which
indicates three different situations:
1.
settings are currently changed with VAMPSET or local
panel, and there is temporarily illegal combination of
curve/delay/points. For example if previous settings were
IEC/NI and then curve family is changed to IEEE, the
setting error will active, because there is no NI mode
available for IEEE curves. After changing valid delay type
for IEEE mode (for example MI), the ‘Setting Error’ signal
will release.
2.
there are errors in the curve point configuration and the
device is not able to interpolate mean values
there are errors in formula parameters A…E, and the device is
not able to build the delay curve.
Limitations:
The maximum measured secondary current is 250 A. This
limits the scope of inverse delays if the setting is more than
12.5 A.
