MODULYS XM650 - 552615A - SOCOMEC
10. OPERATING MODES
10.1. On line mode
A special feature of the UPS is the ONLINE double conversion in conjunction with low distortion mains power absorption.
In ON LINE mode, the UPS can supply a voltage that is fully stabilised in frequency and amplitude, regardless of any
interference in the mains power supply, within the most stringent classication of UPS regulations.
ONLINE operation provides three operating modes according to mains and load conditions:
• Inverter mode
This is the most frequent operating condition: energy is drawn from the primary mains power supply and converted and
used by the inverter to generate the output voltage to power the connected loads.
The inverter is constantly synchronised in frequency with the auxiliary mains to enable load transfer (due to an overload or
inverter shutdown) without any break in the power supply to the load.
The battery charger supplies the energy required to maintain or recharge the battery.
• Bypass mode
In the event of inverter failure, the load is automatically transferred onto the auxiliary mains without any interruption in the
power supply.
This procedure may occur in the following situations:
• in the event of a temporary overload, the inverter continues to power the load. If the condition persists, the UPS output
is switched
• on to the auxiliary mains via automatic bypass. Normal operation, which is from the inverter, returns automatically a few
seconds after the overload disappears.
• when the voltage generated by the inverter goes outside the limits due to a major overload or a fault on the inverter.
• when the internal temperature exceeds the maximum value allowed.
• Battery mode
In the event of a mains failure (micro interruptions or extended power cuts), the UPS continues to power the load using the
energy stored in the battery.
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