Charge Regulator SCR 12 Marine

Charge Regulator SCR 12 Marine
Charge Regulator SCR 12 Marine
Many thanks for purchasing a superwind product.
The SCR 12 Marine is a charge regulator of highest quality and will perfectly and reliably charge your
batteries for many years.
However, reliable operation not only will depend on product quality but also on accurate assembling and
proper wiring. Please read this manual carefully before you start the installation. Please also keep in mind
our safety instructions and warning notices. Our main concern is with your safety.
This manual refers to the charge regulator SCR 12 Marine
Manufacturer: superwind GmbH
Am Rankewerk 2 – 4
D-50321 Brühl / Germany
+49 / 2232 / 577357
+49 / 2232 / 577368
[email protected]
You will find the label with the serial number and the nominal voltage on the side of the housing.
Intended use and range of application
The SCR 12 Marine is designed to sense and limit the output voltage of a Superwind 350 12 V wind
generator and thus to prevent batteries becoming overcharged..
It is suitable for lead acid batteries, gel batteries and AGM batteries (AGM = Absorbed Glass Mat) and
has two battery charging outputs isolated by Schottky blocking diodes. This allows the wind turbine to
charge two batteries totally independent of each other .
The SCR 12 Marine is not influenced by other power sources connected to the batteries like alternators,
gensets, solar arrays and battery chargers. For that reason, it can be used very well in complex systems
and hybrid systems.
The regulator is fully potted to protect the electronics against humidity and vibration.
Fields of application for example are sailing yachts, campers, summer cottages, mountain shelters, as
well as industrial applications, like navigational aids, traffic management systems, environmental
monitoring stations or transmitters.
General safety recommendations
Always abide by the acknowledged rules of technology and the rules for accident prevention when
working on the electrical system.
Take care that works on the electrical system like installation, maintenance and repair is carried out by
qualified persons only. These persons must also have studied the instructions before given in this manual.
Batteries store a large amount of energy. In any circumstance avoid to short circuit a battery. For your
safety connect a fuse to each of the battery cables.
Charging lead-acid batteries produces inflammable hydrogen gas. Unsealed lead-acid batteries have vent
holes releasing hydrogen, which forms detonating gas with the ambient air. A small spark e.g. of an
electrical switch can detonate the explosive gas mixture. For explosion prevention therefore always
provide sufficient ventilation.
Avoid touching and short circuiting wires or terminals. Be aware that the voltage on specific terminals or
wires can be significantly higher than the nominal battery voltage. Only use isolated tools, stand on dry
grounds and keep your hands dry.
Please also follow the instructions of the wind turbine operation manual and the safety recommendations
of the battery manufacturer.
Exclusion of liability
The manufacturer shall not be liable for damages
caused by use other than as intended or mentioned in
this manual or if the recommendations of the battery
manufacturer were neglected. The manufacturer shall
also not be liable if there has been service or repair
carried out by any unauthorised person, unusual use,
wrong installation or inappropriate system design.
Opening the charge regulator voids warranty.
Technical data
Nominal voltage
Max. charging voltage ( 20°C)
Temperature compensation
Max. current
Total resistance of dump resistors
Number of charging outputs
Method of voltage regulation
12 V
14,4 V
30 mV / °C
40 A
0,34 Ohm
LED indicating that max. charging voltage has been
achieved (batteries fully charged)
Option to connect an external temperature sensor
The default setting for the maximum charging voltage can be adapted to special customer requirements.
Since special devices are needed, proper calibration can only be performed by the manufacturer.
Description of functions
The SCR 12 Marine charge regulator has been especially designed for the Superwind 350 12 V wind
generator and guarantees optimum charging of the batteries. The secondary function of the SCR 12
Marine is to electronically keep the wind generator under load. When the batteries have reached their
maximum charging voltage, the SCR 12 Marine´s PWM circuit automatically diverts the wind turbine´s
surplus power to the dump resistors. Thus with batteries even fully charged, the wind turbine continues
operation and provides useable power as soon as electric consumers are switched on. This state of
charge is indicated by the LED and the resistors will make a very slight buzzing sound when operating
and dissipating power.
Choosing the position
The charge regulator and the dump resistors are designed for indoor use and shall be mounted at a place
well protected from the effects of weather. As the charge regulator has a temperature sensor in order to
adapt the charging voltage to the battery temperature, it should be placed in the same room with the
batteries or in a room with the same temperature level. If this is not possible, an external temperature
sensor is available (part no.: 0300.15.01.04) which then replaces the standard sensor mounted at the
regulator housing.
The distance between the regulator and the battery should be minimum 30 cm but not exceed 200 cm.
The distance between the regulator and the power resistors should not exceed 200 cm. The power
resistors must be ventilated properly. Never mount them on a flammable surface and take care, that no
flammable items will be close to the resistors. Consider that the resistors will dissipate all the wind
turbine´s power into heat when the batteries are fully charged.
On a yacht a good place for the power resistors is the engine compartment.
Connecting the charge regulator
Before connecting the charge regulator, prevent your wind generator from unintended starting. Connect
the two generator cables together (caution: disconnect the battery before!) or tie one of the rotor blades to
the mast (if accessible).
Then start with the installation.
Slide the regulator´s black cover sidewards and take it off.
Mount the regulator and the power resistors to a dry, plain and non flammable surface. Use the mounting
For connecting the cables to the charge
regulator use the yellow solderless terminals.
The solderless terminals provided are suitable
for cable cross sections from 2.5 mm² to 6.0
mm² (AWG 13 to AWG 10).
Use a crimping tool suitable for insulated
terminals (see photo) and check that the
terminal has been securely crimped to the bared
part of the cable.
Connect the regulator as shown at the wiring
diagram below.
Important! To prevent your system from damages, the cables must be connected in the order as follows:
1. Connecting the power resistors
Interconnect the two power resistors using the short cables provided and connect them to the terminals
Resistors of the charge regulator. The cross section of the cables must be minimum 4 mm² (AWG 12).
2. Connecting the wind generator
Connect the wind generator to the terminals Gen.+ and Gen.- of the charge regulator. Do never
interchange the polarity of the cables. Interchanged polarity would destroy the charge regulator and void
In general you should mark all line ends by POSITIVE(+) and NEGATIVE (-), in order to prevent errors
with the connection.
Marking of the connecting cables at the Superwind 350:
If you are not sure of the polarity of the cables led down from the wind generator you can identify
POSITIVE (+) and NEGATIVE (-) easily by means of a simple multimeter before connecting the cables
to the charge regulator.
Select DC (range e.g. 10 VDC) on your multimeter, There is normally a red measuring line connected to
the V plug and black line to the COM plug. Connect the measuring lines to the cables coming from the
wind turbine. Ask an assistant to turn the rotor of the wind turbine slowly by hand. The wind turbine
already produces low voltage gaugeable by the multimeter. If the voltage is indicated by (+) or without
prefix, the red measuring line is connected to the POSITIVE (+) cable. If the voltage is indicated by (-) the
red measurement line is connected to the NEGATIVE (-) cable of the wind turbine.
3. Connecting the batteries
You may connect just one battery or two batteries to the SCR 12 Marine. Use the terminals + Batt. 1 and
– Batt. 1 to connect your first battery and use the terminals + Batt. 2 and – Batt. 2 to connect your
second battery. If two batteries are connected, they are charged independently and are protected from
discharging each other by the regulator´s internal Schottky blocking diodes.
Note: In order to avoid accidentally short-circuiting, first connect the cables to the charge regulator and
then to the battery.
Connecting an additional solar panel
The SCR 12 Marine can also be used for charge regulation of an additional solar panel ( See diagram
below). The solar panel´s peak power output must not exceed 150 Watts. In order to prevent current
flowing from the wind turbine to the solar panel, an extra blocking diode (Schottky diode) must be wired
into the positive line of the solar panel. The blocking diode´s current rating must match with the solar
panel´s maximum output. A ready-to-install blocking diode ( max. current 15 A / max. voltage 45 V ) can
be ordered with superwind GmbH ( part no.: 0300.16.00.00)
September 2008
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