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34006452EN/AC - Page 19
Control panel
"Load protected" light
"Inverter on" button
"Inverter off" button
This green light signals that the load is supplied by the inverter and that the specified battery time is available in the event
of a Mains 1 outage. In short, it signals that the system is operating normally.
Note:
In parallel systems, this light concerns only the specific UPS.
The load may not be protected if it depends on the other lines. It is necessary to take into account all the "load protected"
lights for the different system lines or the light on the control panel of the Static Switch Cubicle, if it exists.
This green button is used to locally start the inverter. When it is pushed, the green "load protected" light blinks for
3 seconds, indicating that the start-up order has been received. When the inverter has synchronized with Mains 2, it supplies
the load and the green "load protected" light remains on. The load is supplied by the UPS and the system is functioning
normally. If the transfer to Mains 2 conditions are not correct (Mains 2 voltage, frequency or phase conditions outside
tolerances), the inverter will not start and the system awaits a special order (see the "Hidden control panel" section).
Note:
– for modular UPSs with external maintenance bypass or parallel UPSs with SSC, transfer of the load to the inverters takes
place only when the number of operating lines required to supply the load has been reached;
– for frequency converters, inverter start-up must take place with the load off or drawing a quantity of power equal to or less
than that supplied by a single UPS.
This gray button turns the inverter off.
– press the "inverter off" button for 3 seconds;
– if the transfer to Mains 2 conditions are correct:
– the load is transferred without interrupting to Mains 2,
– the inverter shuts down,
– the green "load protected" light goes off and the red "load not protected" light goes on.
– if the transfer to Mains 2 conditions are not correct, the button produces no effect. A special function on the hidden panel
may be used to force the transfer.
Caution:
If the transfer is forced, the load will be subjected to a 0.8 second interruption in the supply of power.
Note:
– for Modular UPSs or parallel UPSs with SSC, the shutdown of an inverter may or may not result in the transfer of the load
to Mains 2, depending on redundancy conditions;
– if the transfer to Mains 2 conditions are not correct or if the system does not have a Mains 2, the shutdown of a single
inverter will result in the shutdown of the entire system if there is no redundancy.
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