SamplexPower PST-1500-12 Mode D'emploi page 31

SECTION 8 |
cycle will increase. When the battery is fully charged, all the source energy will flow
into the diversion load if there are no other loads. The charge controller will discon-
nect the diversion load if the current rating of the controller is exceeded. Disconnec-
tion of the diversion load may damage the battery as well as the inverter or other DC
loads connected to the battery due to high voltages generated during conditions of
high winds (for wind generators), high water flow rates (for hydro generators). It is,
therefore, to be ensured that the diversion load is sized correctly to prevent the above
over voltage conditions.
- Do not connect this unit to a battery system with a voltage higher than the rated bat-
tery input voltage of the unit (e.g. do not connect PST-1500-12 / PST-2000-12 to 24V or
48V Battery System or PST-1500-24 / PST-2000-24 to 48V Battery System).
8.4.2 Preventing Reverse Polarity on the DC Input Side
!
CAUTION!
Damage caused by reverse polarity is not covered by warranty! When making
battery connections on the input side, make sure that the polarity of battery
connections is correct (Connect the Positive of the battery to the Positive termi-
nal of the unit and the Negative of the battery to the Negative terminal of the
unit). If the input is connected in reverse polarity, DC fuse(s) inside the inverter
will blow and may also cause permanent damage to the inverter.
8.4.3 Connection from Batteries to the DC Input Side – Sizing of Cables
and Fuses
!
CAUTION!
The input section of the inverter has large value capacitors connected across the
input terminals. As soon as the DC input connection loop (Battery (+) terminal "
External Fuse " Positive input terminal of the Inverter " Negative input terminal
of the Inverter " Battery (–) terminal) is completed, these capacitors will start
charging and the unit will momentarily draw very heavy current to charge these
capacitors that will produce sparking on the last contact in the input loop even
when the unit is in powered down condition. Ensure that the fuse is inserted
only after all the connections in the loop have been completed so that sparking is
limited to the fuse area.
Flow of electric current in a conductor is opposed by the resistance of the conductor.
The resistance of the conductor is directly proportional to the length of the conductor
and inversely proportional to its cross-section (thickness). The resistance in the conductor
produces undesirable effects of voltage drop and heating. The size (thickness / cross-
section) of the conductors is designated by AWG (American Wire Gauge). Conductors
thicker than AWG #4/0 are sized in MCM/kcmil. Table 8.1 below gives Resistance in Ohm
(Ω) per Foot at 25°C / 77°F for the wire sizing recommended for use with this inverter.
Installation
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