Technical documentation
Rev. 02
Reactive Factor Controller CX plus
41
on, the control starts with step 1 next. It is checked individually for
each step, if the switching operation is useful. This may lead to an
unprecise compensation in case of steps of different sizes.
NOTE
: The step exchange function and the switching distribution
(switching cycles or operating hours) are always deactivated in case of
steps of the same size.
NOTE
: It is not possible to switch the steps manually.
312
Offset reactive power (Q offset)
-
9,9Mvar…
9,9Mvar
Reactive power OFFSET in var, which is added to the measured reactive
power. This function allows the compensation of a permanently reactive
load which cannot be measured (e. g. from the upstream input
transformer).
NOTE
: The offset of the reactive power also influences the following
measurement values: current, reactive power, control deviation, apparent
power and the power factors COS
, PF and TAN
.
313
Asymmetry factor (asymmetric switching time)
-
127…127
Ratio between switch-on time and switch-off time: The switching time for
the step exchange is not influenced. X is the asymmetry factor.
X = 1 = Switch-on and switch-off time are the same
X = +2 to +127: Switch-off delay is a multiple of the switching time
Switch-off delay = switching time multiplied by X
Switch-on delay = switching time
X = -2 to -127: Switch-on delay is a multiple of the switching time
Switch-on delay = switching time multiplied by X
Switch-off delay = switching time
314
Q capacitive = switch off steps
Yes/No
"
NO
" Capacitive actual value of the COS
is permitted.
"
YES
" Capacitive actual value of the COS
is
NOT
permitted. As soon as
a capacitive COS
is measured, the controller switches off the necessary
step power
without
observing the switching time in order to avoid
capacitive network conditions.
NOTE
: This function only has consequences in the control algorithms
"Best Fit" and "Progressive".
!
CAUTION
This function cannot be transferred to “inductive” steps the other way
round.
The values for target COS
1 and target COS
2 must be set to an
inductive value (0.95 i or lower), because the control will otherwise tend
to hunt.
