Please take care, that in this case all additional power sources
must have a voltage limitation to prevent the battery from
being overcharged.
G
AC
DC
AC
DC
Data
transmission
•
A single shunt can be put into the battery cable that
measures the balance between the charging and
discharging currents. This battery current is then displayed.
With this variation, it is also possible calculate the SOC, but
only one single shunt is necessary.
⇒
The included external temperature sensor must be used to tell
the PowerTarom the actual battery temperature. The final charge voltage will then be optimized by a
temperature compensation.
⇒
The System-Manager transmits system parameters via the DC power lines. These parameters can be
evaluated at each point of the DC grid with additional receivers. Using this unique feature, there are
many possibilities such as:
•
remote load disconnection with different priorities. Remote control switches are individually
programmed in accordance with the load status at which the corresponding load is switch on or off.
With this feature, the light in a certain room can be
switched off when the System-Manager signals that the
battery is reaching a deep discharge level. However,
emergency lights could be left on (no total darkness!)
until a certain even lower battery level is reached. The
emergency light might consume much less energy, so
that it can be kept for a long period of time.
day: OFF
night: ON
20%: OFF
40%: ON
40% : OFF
70% : ON
•
Operating lights during nighttime, e.g. entrance lights. With the help of the module current, the
System-Manager knows the intensity of light outside, so that no additional light sensor is needed.
G
AC
DC
data
transmission
•
PV Array bank switching: With the remote control switch, additional solar modules for charging the
battery can also be used without parallel operation of System-Managers. As soon as the charge
current of the main solar array (connected directly to the System-Manager) is reduced to a
minimum, the second array will be disconnected from the battery by the receiver. (see diagram at
right) In this way, the first array supplies maximum charge current,
(which is necessary to keep up the final charge voltage) and the
battery can be charged according to the desired IE charge
characteristic by simply switching on or off further arrays.
•
operation of additional charging sources, e.g. diesel generators,
grid-operated charge devices. These devices are put into operation
at a low state of charge and switched off after recharging the
battery. For most back-up generators, the remote control switch
serves not as a power switch, but as a start signal to start the
generator (only usable for 2-wire start system generators).
•
Switching on excess loads: When the final end-of-charge
voltage, is reached, the System-Manager must limit the charge current. During this time, a big
portion of the solar energy is no longer used for charging the battery, and is simply wasted.
However, a diversion load can be switched in by the remote control switch. As soon as there is
excess current, instead of being wasted, it is forwarded to excess load such as heating coils or
electrolyser units to generate hydrogen for fuel.
⇒
An external data
logger can be
connected to the
System-Manager. It
stores essential
system parameters
that can be
forwarded to a PC via a serial interface (optional USB). The Data collection frequency can be chosen
freely to determine the data collection period. An additional analogue input can register external
parameters, that cannot be measured by the System-Manager itself: wind speed, module temperature,
solar radiation, etc. The logger comes with the necessary software to operate all the above features.
internet
•
The logger is able to be programmed by the PC
•
The logger is available with an integrated cable modem for remote monitoring
6
Содержание Power Tarom 2070
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