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2.5 Overcurrent protection I>
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2 Protection functions
Technical description
54
VAMP 24h support phone +358 (0)20 753 3264
VM59.EN001
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.
Figure 2.5.1-1 Remote scaling example.
In the Figure 2.5.1-1 can be seen the affect of remote scaling.
After enabling group is changed from group one to group two
and all settings from group one are copied to group two. The
difference is that group two uses scaled pick-up settings.
NOTE! When remote scaling function is used it replaces all the
settings of group 2 so this function cannot be used simultane-
ously with normal group change.
Содержание VAMP 59
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