Operating Instructions Powador 3200 / 4400 / 5300 / 5500 / 6600_EN
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4.10 The RS485 interface
Powador inverters are also equipped with an RS485 interface
in order to enable remote monitoring of your photovoltaic
system. Several inverters can be monitored over this interface
at the same time. Using the Powador-proLOG series, you can
receive yield and operating data as well as error messages by
SMS (text message) or e-mail. This monitoring option is espe-
cially recommended for situations where you are unable to
check the functionality of the system on-site at regular inter-
vals, e.g. if you live far away from the system site. In addition,
you can use the Powador-link within your system to bridge
long distances between several inverters or between an
inverter and the Powador-proLOG using wireless radio trans-
mission. Contact your installer if you wish to add remote mon-
itoring to your system.
4.11 External limiting
As of 01/01/2009, the German Renewable Energies Act (EEG)
requires power regulation for systems larger than 100 kW. In
principle, each individual unit in a network with other units
can become a system of this size. Therefore, each inverter
must have an option for reducing power, even if this is not
needed in a system that is smaller than 100 kW.
KACO uses a ripple control receiver to implement this power
reduction. The power supply company can use this unit to
reduce the system’s power via the Powador-proLOG XL, as
necessary. For this, the following levels are possible: 0 %,
30 %, 60 % or 100 % of AC power. With a setting of 30 % or
60%, the inverter limits the power to 30 % or 60 %. With a
setting of 0 %, the inverter disconnects from the grid. Normal
feed-in mode occurs at 100 %.
When the power supply company requests a reduction in the
power, the Powador-proLOG receives the corresponding
signal via the ripple control receiver. The Powador-proLOG
then forwards the information to all connected inverters,
which reduce power as prescribed by the power supply com-
pany. After a specifi ed period of time without any signal from
the power supply company, the inverters return to normal
operation.
For the duration of the power reduction, the display shows the
power reduction with a corresponding message (e.g. ”Exter-
nal limit xxx%”) and the LED (2) fl ashes once a second. You
can still use the other display functions as usual during a
power reduction.
The ripple control receiver is connected to the Powador-pro-
LOG XL, which is mandatory for the use of power limitation
(power control). You do not have to make any changes to the
inverter in order to use power limitation, since it is integrated
in the inverter as standard. It is activated via the Powador-
proLOG XL.
A group of up to a total of 32 inverters can be symmetrised in
this way. All inverters of a group must be assigned a unique
SYM bus address within the range of 1 to 32. In addition, the
feed-in phase and the maximum asymmetry for any inverter
must be set so that the correct symmetrisation can result.
4.12 Display
Inverters in the Powador series are equipped with a back-lit
LCD (see fi gure 4.1 - (1)) that displays measured values and
data.
In normal mode, the backlight is switched off. As soon as you
press one of the buttons, the backlight is activated. If no key
is pressed after about one minute, it switches off once again.
S e c t i o n 4 ·
O p e r a t i o n
IMPORTANT
Due to measuring tolerances, the measured values may
not always correspond to the actual values. The measur-
ing elements on the inverter have been selected to ensure
maximum solar yields.
Due to these tolerances, the daily yields displayed on the
inverter may deviate from the values on your supply grid
operator's feed-in meter by up to 15 %.
NOTICE
Calculating effi ciency by measuring the current and volt-
age values leads to unusable results due to the tolerances
of the measuring units.
The sole purpose of these values is to monitor the basic
operation of the system.
