Legrand MegaLine Rack 1250 [32/132] Operation
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Legrand MegaLine Rack 1250 [32/132] Operation

Legrand MegaLine Rack 1250 [32/132] Operation
32
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2. Operation
The combination of these signals enables rapid and intuitive understanding of its operating status and recognition of any
problems in the power supply.
There are three main operating modes
- Mains operation
- Battery operation
- By-pass operation
2.2 Mains operation
This is considered the normal operating condition:
- mains voltage is converted by the power factor corrector (PFC) into continuous current
- the inverter reconstructs the sinusoidal voltage from the continuous current
- the output filter provides extra “cleaning” of the output voltage
- the batteries are recharged
2.3 Battery operation
When there is a mains power failure, the UPS automatically switches over to battery mode.
- the voltage of the batteries is increased by the “booster” circuit
- the inverter reconstructs the sinusoidal voltage from the continuous current
- the output filter ensures the voltage supplied to the load is clean
2.4 By-pass operation
The by-pass circuit excludes the UPS and connects the output directly to the input.
The switchover takes place in a synchronised manner in order to ensure the correct output voltage is always guaranteed,
preventing the risk of a break in power or excess voltage.
The intervention of the by-pass circuit can be customised by means of a dedicated menu (Config. UPS, By-pass) which
provides many options (automatic, disabled, by-pass in load waiting mode, etc.) in order to meet the specific demands
of the application.
2.5 Information provided by the display
The main messages provided by the alphanumeric display in the three different operating modes are illustrated below.
UPS switching on...
UPS on mains
UPS
On Mains Indicates normal operating status, when mains voltage is present.
On Battery
Indicates that there is no mains power and the UPS is using its batteries
to supply power.
On By-pass
Indicates that by-pass operation has been turned on: the output of the UPS
is connected directly to the mains.
IN xxxV
Indicates the UPS input voltage and the RMS power absorbed by the mains.
This message is not displayed during battery operation.
OUT xxxV/x,xKW (xx%)
The current power is also given as the percentage of the total power that the
UPS is able to supply.
Batt.
xx,x’
Indicates the state of charge of the batteries in a chart format
and the autonomy available in a numeric format

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