Hello Elnaz,
You ask:
clear, Lockout of protection, Forced switch, manual switch
and so on are external commands of MSP.
Indeed.
please consider this scenario: a user enters an external
command like manual switch on protection but there is SF
on protection. in this case, according to MS and SF hierarchy,
MS will be rejected.
Indeed the SF has a higher switching priority.
Normally a staff member should check the protection status
before issuing an external command.
Or, even better, the management system should give a warning.
my question is when an external command > is rejected like this situation It remains and after clearing SF,
MS must be done and without entering the clear command it
won't be deleted or after rejecting an external command it
will be removed.
Indeed the staff member has to clear the external switch command.
In standard is not mentioned directly about this problem.
Accoording to the standard after clearing of any command the
APS function has to re-evaluate all existing commands and act
according to the priority list.
In the above case the MS will become active after the wait to
restore timer expires.
I will appreciate if someone helps me.
I hope I did.
Regards, Huub.
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