Beluk CX plus, Reference Manual, Page: 59 / 84

Technical documentation Rev. 02
Reactive Factor Controller CX plus
59
overcompensation / under-
compensation

(The controller could not
reach the target COS-PHI
after a 75-fold switching time,
because no suitable step is
available for switching on
resp. off (

Q > smallest
step)
settings.

Check the power
contactors, the contactor
contact may be stuck
together or the contactor
coil may be defective.

Check the settings of all
step types (steps may be
set to "FON"

permanently switched on or
set to "FOFF"

deactivated)

Check the relation of the
current to the original step
size of the individual steps,
the power loss of one or
several steps may be too
high

change the affected
steps, if necessary.

Check if one or several
steps were identified as
defective and were locked

check the capacitors,
fuses and power
contactors. Set the step
type to “AUTO”, if
necessary.

Check the dimensioning of
the system. The
compensation power may
not be enough anymore or
the gradation of the step
sizes is too rough or the
step sizes may be
oversized.

Opposite control behaviour:
Controller switches on a
capacitor step

COS-PHI
becomes more inductive instead
of changing towards capacitive.

Phases via the connection of
measuring voltage and
current do not correspond to
the set phase correction
angle

Connection of measuring
voltage and current has been
connected at a twisted angle
of 180° (U2 / U1 instead of
U1 / U2 resp. S2 / S1 instead
of S1 / S2).


Correct the connection of
current and voltage, if
necessary, or adjust the
phase correction angle.

If the connection of voltage
or current has been mixed
up, correct the connection
or add 180° to resp.
subtract 180° from the set
phase correction angle
(new angle < 360°) and
enter.
EXPORT and a COS-PHI
capacitive are shown on the
display, even though no active
power is fed back and the COS-

Connection of measuring
voltage and current has been
connected at a twisted angle
of 180° (U2 / U1 instead of
U1 / U2 resp. S2 / S1 instead

If the connection of voltage
or current has been mixed
up, correct the connection
or add 180° to resp.
subtract 180° from the set