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Technical description
2 Protection functions
2.5 Overcurrent protection I> (50/51)
VM50.EN004
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53
Recorded values of the overcurrent stages (8 latest faults)
I>, I>>, I>>> (50/51)
Parameter Value
Unit Description
yyyy-mm-dd
Time stamp of the recording, date
hh:mm:ss.ms
Time stamp, time of day
Type
1-N
2-N
3-N
1-2
2-3
3-1
1-2-3
Fault
type
Ground fault
Ground fault
Ground fault
Two phase fault
Two phase fault
Two phase fault
Three phase fault
Flt
xImode Maximum fault current
Load
xImode 1 s average phase currents before
the fault
EDly
%
Elapsed time of the operating
time setting. 100% = trip
SetGrp 1
2
Active setting group during fault
2.5.1.
Remote controlled overcurrent scaling
Pick-up setting of the three over current stages can also be
controlled remotely. In this case only two scaling coefficients
are possible: 100% (the scaling is inactive) and any configured
value between 10% - 200% (the scaling is active). When scaling
is enabled all settings of group one are copied to group two but
the pick-up value of group two is changed according the given
value (10-200%).
This feature can be enabled/disabled via VAMPSET or by
using the local panel. When using vampset the scaling can
be activated and adjusted in the “protection stage status
2” –menu. When using the local panel similar settings can
be found from the “prot” -menu.
It is also possible to change the scaling factor remotely by
using the modbus TCP –protocol. When changing the
scaling factor remotely value of 1% is equal to 1. Check the
correct modbus address for this application from the
vampset or from the communication parameter list.