Voltage Controls - LEGRAND 261 93 Mode D'emploi

6. Voltage controls

• Any condition required to determine whether a
supply source is or is not suitable is determined by
the user through the P0 menu (system nominal
data) and the P2 and P3 menus (voltage control,
main line and secondary line, respectively).
• It is possible to set up the system nominal data,
such as nominal voltage and frequency, through
the P0 menu, which will be used as a reference
for setting up the percentage thresholds of the fol-
lowing menus.
The following describes the anomalies monitored by the voltage control.
Columns 261 93 and 261 94 point out the presence of the function within their unit models.
Control
Minimum voltage
Maximum voltage
Phase failure
Asymmetry (unbalance)
Minimum frequency
Maximum frequency
Sequence of phases
261 93 261 94
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•
• •
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•
•
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• It is possible to set up a TV transformation ratio in
case a lower voltage, relative to the actual voltage
of the system, is applied to the voltage inputs of
the unit. Here, again, the display and the setup of
the thresholds will be executed in actual sizes
referred to the system.
• The electronic control box can be programmed
to perform voltage controls on three-phase, two-
phase or single-phase nets (via the P0.03
parameter).
Description
One or more phases too low
One or more phases too high
Threshold under which the device can operate faster
compared to a normal reduction
Phases included in the Maximum-Minimum interval,
yet too different between each other
Frequency too low
Frequency too high
Reverse rotation of phases
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