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Operation
Automatic sequences
Manual Mode/Automatic Mode
permutation/power supply reappearance
• As soon as the selector switch is switched to automatic,
the automatic mode is active
• Voltages and frequencies are verified to define new stable
position of the changeover switch
• The same table can be taken into account after complete
power supply loss (the product must be completely
discharged to reset =3 minutes.)
q
Refer to timer menus for MFT, MRT or DTT timers
definition.
New stable position of the chaneover swicth
Changeover switch
initial position
Sources availability
New position
Priority source
Priority source available
emergency source available or unavailable
Priority source
Priority source
Priority source unavailable for MFT time period,
emergency source available or unavailable
Emergency source. If emergency
source unavailable start emergency
source first and wait for DTT timer
period before transfer
Emergency
source
Emergency source available
priority source unavailable
Emergency source
Emergency
source
Emergency source available
priority source available for MRT time period
Priority source
Position 0
Priority source available
emergency source unavailable
Available source to count down MRT
before transfer to priority source
Position 0
Priority source available
emergency source available
Priority source
Position 0
Priority source available
emergency source available
Emergency source
Position 0
Priority source available
emergency source unavailable
No action (because no supply).
When supply becomes available
change to priority source or
emergency source
q
The switch immediately transfers to new stable position as soon as the keyswitch is turned fromManual to
Automatic mode or as soon as Power comes bac
k.
Loss of priority source automatic sequence
This sequence is started as soon as the switch is in automatic
mode and in priority position (position I - source 1).
• source 1 is available
• transfer switch is in position I
• source 2 is available or unavailable
Available source
Source being with in programmed voltage and frequency
settings, phases rotation being correct.
Specific feature: remote transfer control
It is possible to transfer from main source to emergency
source before DTT finishes up. If it is setup to its maximum
values (60s), it is possible to allow transfer closing terminals
207-208 (CTS).
