ITALFARAD Power Factor PFC5 Notice D'utilisation page 40

ITALFARAD S.p .A. via IV novembre n.1 Minerbio (BO) It aly
conditions. If not, the CT connections (S1 and S2 terminals) must be inverted or more
simply set Inverse.
WARNING! Before disconnecting the S1 and S2 terminals, check that the CT secondary
terminals are shorted.
P.13 - Mains frequency recognition
Automatic selection, fixed 50Hz or fixed 60Hz.
P.14 - Step power adjustment
When this function is enabled and during normal operation, the unit allows automatic
measurement of
parameters in case the steps are worn (i.e. by making many operations).
Note:
When this function is used, the time between the connection of one bank and the next
is 20 seconds.
If the automatic set-up is used, the function is automatically enabled.
P.15 - Standard or Band regulation mode
In Standard mode, the controller adjusts the system cos to the set value. In Band mode,
the capacitors are connected when the system cos is lower than the set value and are
disconnected when in capacitive conditions. The Band mode is used to further reduce the
number of capacitor connections and disconnections.
Note: The Band mode configuration does not allow programming of capacitive cosφ.
P.16 - Standard or Linear connection mode
In Standard mode, the controller freely selects the steps according to the logic described in the
Automatic operation section above. In Linear mode, the steps are connected only by
progression from left to right following the step number and according to the LIFO (Last In First
Out) logic. The controller will not connect a step when the system steps are of different power
ratings and by connecting the next step, the set-point value would be exceeded.
P.17 - Co-generation cos
This parameter is programmed when a 4-quadrant operation is required, i.e. when the
system is in the condition of consuming or producing energy. When the parameter is set
to OFF, the cos set-point is the only one and corresponds to the value programmed with
SET COS (see page 36). On the other hand, when it is set to a numeric value then the
set-points are two: under normal conditions (system consumes mains energy, positive cos
), the set-point value is considered as programmed by SET COS .
Under co-generation conditions (system produces energy, negative cos ), it is used as
programmed to P.17.
P.18 - Disconnection sensitivity
With this parameter at OFF, the sensitivity value set to P.05 (see basic menu) adjusts the
reactive speed during both the connection and disconnection phases. However, if P.18 is
set to a different value, the programmed value of P.05 is considered for the connection
while the value P.18 is used for the disconnection of the steps.
P.19 - Step disconnection at change to MAN mode
When this parameter is enabled, the connected steps are disconnected in sequence when changing
from AUT to MAN mode. At the end of the disconnection, the normal manual mode function is restored.
P.20 - Capacitor overload alarm threshold
By using this parameter, it is possible to adjust the tripping threshold of alarm Capacitor
Overload. The percentage of current flowing in the capacitors (calculated by the waveform
of the phase voltage) is compared with this threshold. If the threshold value is exceeded,
after the delay, the alarm is generated and the steps disconnected.
the power rating of the steps and modification of the operating
set-point
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GB