Kaco Powador 3200 Operating instructions manual - Notice
Installation instructions Powador 3200 / 4400 / 5300 / 5500 / 6600_EN
Page 17
5.7 Power Boost
In order to change the frequency of the IGBT bridge from
17 kHz to 9 kHz, the Power Boost mode must be activated in
menu level 2.
Note the following as this change is made: 9 kHz is within the
range of audible frequencies.
The Power Boost mode improves the degree of effi ciency and
can be used where the operating noise from the inverter is
acceptable.
5.8 Grid monitoring
The inverters are normally connected to one phase only. In this
case, single-phase grid monitoring is active; this prevents island-
ing. It may be useful to establish three-phase grid monitoring
in special system confi gurations. In this case, three-phase grid
monitoring can be activated in menu level 3. The inverter must
all be connected to three phases. The feed-in phase is always
the terminal on the inverter marked L1.
5.9 Starting up the inverter
After completing the mechanical and electrical installation, the
inverter is put into operation as follows:
NOTICE
The inverter can only be put into operation under daylight
conditions (i.e. when the PV array voltage is present). If no
daylight or PV array voltage is present, the inverter can be
activated by pressing the night start-up key (see section 4.8
in the Operating Instructions). However, normal operation
is not possible in this condition. Only the values can be
read off the display.
ACTION
– Switch on the grid voltage (via the external circuit
breakers).
– Switch on the PV array via the DC disconnect (0 → 1).
During the initial start-up, the appropriate country and language
must be selected.
The green “PV-Generator” LED lights up when in non-feed-in
mode and indicates that it is ready to be put into operation.
The display now indicates the current generator voltages “Start
from xxx V, meas.: xxx V”. If the measured voltage is greater
than the starting voltage, the unit will start the feed-in after a
country-specifi c waiting time. This start-up period is required
in order to ensure that the generator voltage is continuously
above the power delivery limit.
A quick start routine is provided for startup and test purposes.
This routine circumvents the start-up period. This quick start
routine is found in the confi guration mode menu (see Operating
Instructions).
During the normal start-up procedure, the line relays audibly
switch on after a country-specifi c time period and the feed-in
starts. This is indicated by the green LED “Grid-feed”. The
display now shows the power being fed into the grid. The
“Display” key can now be used to display the various measured
values (see Operating Instructions).
Frequency-dependent power reduction
If the grid operator requires frequency-dependent power
reduction in accordance with the BDEW Medium Voltage
Directive (“Mittelspannungsrichtlinie”), this must be activated
via the display.
You can fi nd the relevant menu item in the parameter menu
under “Activate BDEW” (menu level 3, page 19).
Power reduction starts at 50.2 Hz. Overfrequency shutdown
occurs at 51.5 Hz.
At the moment that 50.2 Hz is exceeded, the current power is
“frozen” and used to calculate the power reduction.
The power is reduced with a gradient of 40% power reduction
per 1 Hz increase in frequency. The inverter then has status 11
(power reduction). No other information is shown on the display.
The active power may not be increased again until after the
frequency has returned to a value of f ≤ 50.05 Hz.
Underfrequency shutdown occurs at 47.5 Hz.
f [Hz]
P
50,2
51,2
51,5
100%
48%
60%
1Hz
40%
50,05
Figure 5.12: Frequency-dependent power
reduction
S e c t i o n 5 ·
I n s t a l l a t i o n a n d S t a r t - U p