4
2.
Device description
Power factor correction regulator PFC 12 is designed for power factor control in balanced low and medium voltage system
networks 50/60 Hz.
PFC 12 regulators measure and display also following parameters:
Parameter
Display
Maximum
Instantaneous cosφ, average cosφ (capacitive, inductive)
●
Line voltage between measured phases
●
●
Current in the measured phase
●
●
System frequency
●
●
Apparent three-phase power
●
●
Active three-phase power
●
●
Reactive three-phase power
●
●
Allowed reactive power
●
●
Odd current harmonics (1 ... 19) in %
●
●
Total harmonic distortion of current THDI
●
●
Odd voltage harmonics (1 ... 19) in %
●
●
Total harmonic distortion of voltage THDU
●
●
Number of connections of each stage
●
Total time of step usage of each step
●
Temperature
●
Table 1. Measured and displayed parameters
Regulator variant Power supply voltage
Measuring voltage
Alarm output
PFC 12
400 VAC
400 VAC
yes
Table 2. Power supply and measuring voltage
3.
Instruction manual for connection and operation
Default parameters are set to the device in production, according to the table 4. Supply voltage has to be taken from regulated
network, because it is used also for voltage measuring circuit. Value of this supply voltage is on the product label. Current for
current measuring circuit is taken from the remaining phase. By default, in the case of 3 x 400 V, voltage is being measured
between phases L2 and L3, and the current is being measured in the phase L1. The connection of measuring circuits is shown
at picture 3.
Commissioning procedure:
1.
Make connection according to connection diagram at picture 5.
2.
Connect supply voltage. In the case that the value of current is lower than 3 mA, the display will show "----". If not, the display
will show instantaneous value of power factor.
3.
Press button
SET
for the time longer than 5 seconds. After that device will switch to the configuration menu and on the display
will appear parameter
CoS1
.
4.
By pressing the button
SET
once again display will show target
cosφ.
Setting the targeting values of
cosφ
is done via buttons
▲
(+) and
► (-) .
5.
Confirmation of the set value
CoS1
is done by pressing the button
SET
.
6.
Press the button
▲
until the parameter
Itr
will appear on the display. It means ratio of current transformer.
7.
Press the button
SET
and on the display will appear set value of transformer ratio (default value is 1).
8.
Using the buttons
▲
,
►
set known value of transformer ratio.
9.
By pressing button
SET
confirm set value. On the display will appear again the parameter
Itr
.
10.
In the case that measuring / supplying voltage is taken from voltage transformer, move to the parameter
U_tr
by pressing button
▲
. For example, if the ratio is 22000 / 100, then it should be set like 220.
11.
Now again, by using the buttons
▲
,
►
move to the parameter
Auto
and by pressing button
SET
confirm it. Via button
▲
switch to the value
on
and via button
SET
confirm set value. Device automatically perform phasing of measured voltage,
current and detection of connected compensation stages. All parameters will be saved to the internal memory. When the
detection is finished, parameter
Auto
will be automatically changed to the value
oFF
.
12.
Verify if detection of power of all stages was done correctly. Press button
SET
for time of 5 seconds. On display will appear
CoS1
, via pressing button
▲
move to the parameter
St_P
. Press again button
SET
and
LED1
of first stage will be turned
on
.
Another pressing the button
SET
will make the value of the power of the first stage be shown on the display. If the value is not
correct, it should be changed by pressing buttons
▲
,
►
until the correct value. In the case of capacitor stage
LED cap
, placed
at the left side of display, has to light. If the power is correct press again button
SET
and on the display will appear again
