Product Manual

38
LOAD CONTROL
39
MORNINGSTAR CORPORATION
5.0
5.5.3 Reverse Polarity
If the battery is correctly connected (LEDs are on), the load should be connected
very carefully with regard to polarity (+ / –).
If the polarity is reversed, the controller cannot detect this. There are no indications.
Loads without polarity will not be affected.
Loads with polarity can be damaged. It is possible that the TriStar will go into short
circuit protection before the load is damaged. If the LEDs indicate a “short”, be
certain to check for both shorts and reversed polarity connections.
If the controller does not go into short circuit protection, the loads with polarity will
be damaged.
CAUTION: Carefully verify the polarity (+ and –) of the load connections before
applying power to the controller.
PRUDENCE : Vérifiez avec précaution la polarité (+ et –) des connexions de la charge
avant de mettre le contrôleur sous tension.
6.0 Diversion Charge Control
The TriStar’s third mode of operation is diversion load battery charge control. As the
battery becomes fully charged, the TriStar will divert excess current from the battery to a
dedicated diversion load. This diversion load must be large enough to absorb all the
excess energy, but not too large to cause a controller overload condition.
6.1 Diversion Charge Control
In the diversion mode, the TriStar will use PWM charging regulation to divert excess
current to an external load. As the battery becomes fully charged, the FET switches are
closed for longer periods of time to direct more current to the diversion load.
As the battery charges, the diversion duty cycle will increase. When fully charged, all the
source energy will flow into the diversion load if there are
no other loads. The generating source is typically a wind or hydro generator. Some solar
systems also use diversion to heat water rather than open the solar array and lose the
energy.
The most important factor for successful diversion charge control is the correct sizing of
the diversion load. If too large, the controller’s protections may open the FET switches
and stop diverting current from the battery. This condition can damage the battery.
If you are not confident and certain about the installation, a professional installation by
your dealer is recommended.
6.2 Diversion Current Ratings
The maximum diversion load current capability for the two TriStar versions is 45 amps
(TS-45) and 60 amps (TS-60). The diversion loads must be sized so that the peak load
current cannot exceed these maximum ratings.
See section 6.4 below for selecting and sizing the diversion loads.
The total current for all combined charging sources (wind, hydro, solar) should be equal
or less than two-thirds of the controller’s current rating: 30A (TS-45) and 40A (TS-60). This
limit will provide a required margin for high winds and high water flow rates as well as a
margin for error in the rating and selection of the diversion load. This protects against an
overload and a safety disconnect in the TriStar controller, which would leave the battery
charging unregulated.
CAUTION: If the TriStar’s rating is exceeded and the controller dis connects the
diversion load, Morningstar will not be responsible for any damage resulting to the
system battery or other system compo nents. Refer to Morningstar’s Limited Warranty
in Section 10.0.
PRUDENCE : Si la capacité du TriStar est dépassée et que le contrôleur déconnecte la
charge de diversion, Morningstar ne sera pas responsable de tout dommage résultant de
la batterie du système ou d’autres composants du système. Reportez-vous à la Garantie
limitée de Morningstar dans la Section 10.0.
6.3 Standard Diversion Battery Charging Programs
The TriStar provides 7 standard diversion charging algorithms (programs) that are
selected with the DIP switches. An 8th algorithm can be used for custom setpoints using
the PC software.