Samlex Power PST-150-12 Manuel Du Propriétaire page 32

SECTION 8 |
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-150-12 to 24V or 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 inside the inverter
will blow and may also cause permanent damage to the inverter.
8.4.3 Connection from the Batteries to the DC Input Side of
the Unit – Sizing of Cables and External Fuses
WARNING!
The input section of the inverter has large 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 that
will produce sparking on the last contact in the input loop even when the ON/
OFF switch on the inverter is in the OFF position. Ensure that the external fuse is
inserted only after all the connections in the loop have been completed so that
the sparking is limited to the fuse area.
The 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 conduc-
tor produces undesirable effects of voltage drop and heating. Thus, thicker and shorter
conductors are desirable.
The size (thickness / cross-section) of the conductors is designated by AWG (American
Wire Gauge). Please note that a smaller AWG # denotes a thicker size of the conductor
up to AWG #1. Wires thicker than AWG #1 are designated AWG 1/0, AWG 2/0, AWG 3/0
and so on. In this case, increasing AWG # denotes thicker wire.
32 | SAMLEX AMERICA INC.
Installation