Ice NP900 Series, Инструкция по применению

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Application Guide - NP900 Series 375 (504
)
A996A
Application controlled setting group change can be applied also completely from the
relays internal logics. One example can be setting group change based into cold load pick
up function.
Figure 3.6.1.3-177 Example of fully application controlled setting group change with
CLPU function.
In this example the CLPU function output is used for the automatic setting group change.
Similarly to this application, any combination of the available signals in the relay database
can be programmed to be used for in the setting group selection logic.
As can be seen from these presented examples the setting group selection with
application control has to be built fully when using this approach for the setting group
control. Setting group will not change back to SG1 if it is not controlled back to SG1 by the
application. This explains the inverted signal “NOT” and use of logics in the SG control.
Another approach can be that the SG2 in these cases would be selected as primary SG
while with “On” signal would be controlled higher priority SG1. By this way after the
automatic control is over SG would return automatically to SG2.
Figure 3.6.1.3-178 Example of setting default SG constant signal.