Example applications for setting group control
This chapter presents some of the most common applications for setting group changing requirements.
A Petersen coil compensated network usually uses directional sensitive earth fault protection. The user
needs to control its characteristics between varmetric and wattmetric; the selection is based on
whether the Petersen coil is connected when the network is compensated, or whether it is open when
the network is unearthed.
Figure. 5.4.1 - 143. Setting group control – one-wire connection from Petersen coil status.
Depending on the application's requirements, the setting group control can be applied either with a
one-wire connection or with a two-wire connection by monitoring the state of the Petersen coil
connection.
When the connection is done with one wire, the setting group change logic can be applied as shown in
the figure above. The status of the Petersen coil controls whether Setting group 1 is active. If the coil is
disconnected, Setting group 2 is active. This way, if the wire is broken for some reason, the setting
group is always controlled to SG2.
A
AQ
Q-M210
-M210
Instruction manual
Version: 2.04
225
Содержание AQ-M210
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