Operation
30
6.4.5.2 CHECK SYNCHRONISING IS ENABLED
NOTE : The module waits indefinitely for synchronisation unless the ‘Return to programmed
NOTE : The module waits indefinitely for synchronisation unless the ‘Return to programmed NOTE : The module waits indefinitely for synchronisation unless the ‘Return to programmed
NOTE : The module waits indefinitely for synchronisation unless the ‘Return to programmed
transition’ function is active in which case after 2 minutes it performs a non
transition’ function is active in which case after 2 minutes it performs a nontransition’ function is active in which case after 2 minutes it performs a non
transition’ function is active in which case after 2 minutes it performs a non-
--
-sync t
sync tsync t
sync transfer as described
ransfer as described ransfer as described
ransfer as described
in the previous section.
in the previous section.in the previous section.
in the previous section.
NOTE : The transfer time is ignored during a check
NOTE : The transfer time is ignored during a checkNOTE : The transfer time is ignored during a check
NOTE : The transfer time is ignored during a check-
--
-sync but is used if the transfer fails and it
sync but is used if the transfer fails and it sync but is used if the transfer fails and it
sync but is used if the transfer fails and it
performs a non
performs a nonperforms a non
performs a non-
--
-sync transfer.
sync transfer.sync transfer.
sync transfer.
6.4.5.2.1 TRANSFER TO S2
When the module is about to transfer from S1 to S2 it activates the check sync function.
When the S1 and S2 are within the phase and frequency window the module energises the Open S1 and Close S2
outputs simultaneously. These outputs are de-energised when the S2 Closed Auxiliary input indicates it has
successfully closed, or after 1s whichever occurs first.
6.4.5.2.2 TRANSFER TO S1
When the module is about to transfer from S2 to mains it activates the check sync function.
When S1 and S2 are within the phase and frequency window the module energises the Open S2 and Close S1
outputs simultaneously. These outputs are de-energised when the S2 Closed Auxiliary input indicates it has
successfully closed, or after 1s whichever occurs first.
6.4.5.2.3 LOAD SHED INPUT
When the Load Shed input is activated while the generator is closed the Open S2 output energises, it then de-
energises when the S2 Closed Auxiliary input indicates that it has successfully opened, or after 1s whichever occurs
first.
When the Load Shed input is activated while the mains is closed the Open S1 output energises, it then de-
energises when the S1 Closed Auxiliary input indicates that it has successfully opened, or after 1s whichever occurs
first.
When the Load shed input is de-energised the load is returned to the supply that was disconnected, providing that
supply is healthy.
6.4.5.2.4 TIMING DIAGRAM
Open S1
Close S2
Close S1
Open S2
S2 has closed
S1 has closed
In Sync
In Sync
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