Testing Control Functions; Synchronizing And Energizing Check Sesrsyn - ABB Relion 650 Series Commissioning Manual

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5.7
5.7.1
REC650
Commissioning Manual
another function is tested, then set the parameter Blocked to No, under Main menu/
Tests/Function test modes/<Function group>/<Function>/<1:Function> for the
function, or for each individual function in a chain, to be tested next. Remember to
set the parameter Blocked to Yes, for each individual function that has been tested.

Testing control functions

The save of persistent parts of function block states/values to
persistent memory uses an exponential back-off algorithm, which
rapidly increases the time between save operations when there are
frequent changes in such states/values. This means, that when e.g. a
pulse counter is exercised periodically, the time between saves of
its counter value to persistent memory will occur more and more
seldom until there is one hour between save operations. If the IED
is restarted by turning auxiliary power off and back on, then up to
one hour of counter value increments will be lost. This back-off
algorithm is necessary to avoid wearing out the FLASH memory
that is used to save the states/values. When changing parameter
values using LHMI or PST, there is a save of this type of memory
before rebooting, so in this case normally no information is lost.
When there are long periods of inactivity, the time between save
operations decreases slowly again, until it reaches the minimum
time between saves, which is approximately once per second. After
commissioning is complete, the possible loss of information should
not be an issue, since in normal operation an IED is switched off
extremely seldom. But during certain tests, if the IED is rebooted,
then data of this kind will sometimes revert back to old values.

Synchronizing and energizing check SESRSYN

This section contains instructions on how to test the synchronism and energizing
check for single CB .
Prepare the IED for verification of settings as outlined in
verify settings".
Values of the logical signals are available on the local HMI under: Main menu/
Tests/Function status/<Function group>/<Function>/<1:Function>. The Signal
monitoring tool in PCM600 shows the same signals that are available on the LHMI.
At commissioning and periodical checks, the functions shall be tested with the used
settings. To test a specific function, it might be necessary to change some setting
parameters, for example:
Section 5
Testing functionality
4.1 "Preparing the IED to
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