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VAMP Ltd
Overcurrent and earth-fault relay
Technical description
VAMP 140
VM140.EN011
Vamp 24h support phone +358 (0)40 573 6316
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Io
MAX
Ioarcset
>
Register
events
Trip
Enable events
Setting
ArcIo>
L1>
L2>
ArcBI
>
Figure 2.2.6-2 Block diagram of the arc protection stage ArcIo>. The symbol
of the starting of the arc sensor is L> and that of the fast earth-fault stage is
ArcIo.
The setting of the earth-fault arc protection stage is performed
in the menu called Io SETTING/ArcIo Set.
Delayed Arc S>
A delay function can be triggered with one or more of the S1>,
S2> or Arc BI signals. The output of the function is activated
after the specified delay and deactivated when the trigger
signal is deactivated.
The function can be used e.g. to implement back up for the arc-
protection function.
Parameters of the arc protection stage ArcI> (51L>):
Parameter: Value/unit:
Measured
value
IL max
A
Max. value of phase currents IL1,
IL2, IL3 primary values
ArcI>
pu
Setting value as per times In
Setting
values
ArcI>
sensor
Selection of the arc sensor
channel(s) and/or arc binary input
SCntr
Cumulative start counter, only
selected ArcCn arc activations
TCntr
Cumulative trip counter, only
selected ArcCn arc activations
Recorded
values
Flt %
Maximum value of fault current as
per times In
Parameters of the arc protection stages ArcIo> (51NL>):
Parameter: Value/unit:
Measured
value
Io A
Max. value of earth-fault current Io
primary value
ArcI>
pu
Setting value as per times Ion
Setting
values
ArcI>
sensor
Selection of the arc sensor
channel(s) and/or arc binary input
SCntr
Cumulative start counter, only
selected ArcCn arc activations
Recorded
values
TCntr
Cumulative trip counter, only
selected ArcCn arc activations