Meta System MEGALINE 1250 RACK Instruction Manual page 42

Input
PLL Enable
Extended PLL Range
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.
!
ATTENTION: If the PLL function is disabled, the automatic by-pass function is also disabled.
Should the variation in input frequency be above the set range, the UPS will inhibit the PLL function and
release the output and input lock. When the range returns within the set threshold, the PLL function will be
reinstated automatically.
Bypass
Bypass Enable
Forced mode
DIP Speed
Off-line mode
Load Wait Mode
NB: Load Waiting without mains power
In "Load Waiting" mode, the UPS will switch the by-pass on when the load is below the set threshold. Should there be
no mains power, the UPS will switch off and only switch on again when mains power is restored.
➧
PLL Enable
Extended
PLL Range
Bypass
➧
Enable
Forced mode
DIP Speed
Off-line mode
Load Wait
Mode
4 - Customising the UPS operating mode
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)
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%.
If enabled, the UPS manages by-pass intervention
automatically.
If disabled, the UPS will never switchover to by-pass
operation. The UPS will switch off in cases of lengthy
overload.
If enabled, the UPS enters permanent by-pass operation.
This is to alter the sensitivity of the automatic intervention
by the by-pass (when forced mode is disabled)
SLOW: for loads that are not sensitive to dips in voltage or
micro breaks but that cause frequent peaks.
STANDARD: normal use
FAST: loads sensitive to micro breaks
If enabled, the by-pass operates as follows:
- When mains power is present, the UPS runs permanently
in by-pass mode
- Should mains power fail, the UPS enters battery mode.
ENABLE: switches the function on or off
If enabled, the by-pass enters operation when the load is
below the threshold set for "Minimum load threshold"
Above this threshold, the by-pass stops working.
Minimum load threshold: to set the value for the load for
the switching on and off function (refer to NB: Load Waiting
without mains power).
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