Legrand MEGALINE Specifications download pdf (Page 18)

4.5 UPS Setup

4. Customising the UPS operating mode

Output

Input

Voltage

Frequency

N+x Redundancy

PLL Enable

Extended PLL Range

Voltage To set the UPS output voltage (V)

Frequency

To set the UPS output frequency (Hz)

Nominal Value: to set a numerical value for the output

frequency (50 or 60)

Auto Selection:

If enabled, the UPS reads the frequency of the input

voltage and then synchronises the output to the same

value.

If disabled, the UPS uses the set Nominal Value.

N+x

Redundancy

To set the number of redundant boards

(refer to NB: Redundancy Settings)

PLL Enable

If enabled, the UPS synchronises the output sine wave

with the input If disabled, the output voltage is not

synchronised with the input.

This is indicated by the flashing of the status

warning light (green)

Extended

PLL Range

If enabled, the UPS synchronises the output voltage with

the input for variations in frequency of +/-14% the

nominal value. If disabled, the PLL is synchronised for

variations in frequency of +/-2%.

NB: Redundancy Settings

This function is used to manage the redundancy of the power modules. For example: a load requires N power modules; X power

modules must be added to achieve N+X redundancy.

If the load applied exceeds the power supplied by N modules during operation, the UPS will signal the lack of redundancy

A numerical example is given below:

NB: PLL Settings.

The PLL function ensures the UPS output frequency is synchronised with the input so that the changeover at zero takes

place at the exact same time. Should the by-pass intervene, e.g. due to unanticipated loads, input-output synchronisation

is guaranteed.

Load

Power

boards

Total

power (W)

Redundancy

alarm (W)

Overload

alarm (W)

3700 3 3750 0 no 3750

3700 4 5000 1 3750 5000

1500 4 5000 2 2500 5000

1000 4 5000 3 1250 5000

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 31 32

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Legrand MEGALINE Specifications Page 18

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