KMB NOVAR 2600, Operating Manual

Page: 27 / 96

NOVAR 2600 Operating Manual
4.3.1.4 Offset Power for Tariff 1/2
These parameters are meaningful when offset control parameter ( see below ) is activated only.
Unless this control mode is active, they do not appear.
The parameters specify
nominal value of the offset (three-phase) reactive power for tariff 1,
respectively for tariff 2. In the parameter sublevel, you can specify not only the 3-phase reactive power
value but the “offset power type” as well, in exactly the same way as compensation section powers.
Positive value of the power means capacitive offset power, negative value means inductive offset
power. So if, for example, an offset control is required due to a front-end capacitor, you must specify
positive offset power value. The controller will then intentionally undercompensate at its connection
node just by the size of the specified offset power value.
Like the section powers, their values correspond to nominal three-phase power (i.e. at voltage
corresponding to the preset compensation system nominal voltage
U
NOM
). The actual value of the
offset power is, as well as for capacitor and choke powers, dependent on the actual network voltage.
4.3.1.5 Tariff 2 Control
The controllers feature two sets of the above described control parameters. Each of the sets – marked
as
1 and 2 - comprise following parameters :
• target power factor
• control bandwidth
• control times (
UC
and
OC
)
• offset power
The tariff 2 control parameter decides if the control process uses the first set of basic control
parameters only or if, under certain circumstances, the second set of parameters for tariff 2 is used as
well. The parameter can be set to :
• Off … the controller uses tariff1 parameters set only, the tariff 2 set parameters are irrelevant
• Input … actual tariff set is controlled by external signal. If the controller's digital input is not
activated the tariff1 set is used; if the controller's digital input is activated the tariff2 set is
used. This option is relevant only for controllers equipped with digital input.
•
Power
… actual tariff set is controlled by actual three-phase fundamental harmonic active
power
3Pfh
. For details see the tariff 2 control power parameter description further below.
• Table … actual tariff set is controlled by the electricity meter tariff zone table and actual real
time counter (RTC)
time
(for details, see electricity meter description in the general meter
block part of the manual ). If the tariff1 is active the tariff1 set of parameters is used. For any
of all of other tariffs is active the tariff2 set is used. This option is relevant only for controllers
equipped with the RTC.
By default, the tariff 2 control parameter is off. The tariff 2 set of parameters is not significant in such
an event, so the parameters are not shown.
If the tariff 2 control parameter is not off, you can check which tariff set of parameters is currently
active in the info folder of the data & status panel.
4.3.1.6 Tariff 2 Control Power
If the tariff 2 control parameter is set to
Power
, the 2
nd
set of the parameters listed above apply as
soon as actual three-phase fundamental harmonic active power 3Pfh drops below the preset level of
the tariff 2 control power parameter. This limit value is set in percent of preset nominal power P
NOM
.
27