Xantrex Freedom EX 4000, Руководство по установке

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Basic Installation Procedures
14 Freedom EX 4000 Installation Guide
Ground Fault Circuit Interrupters (GFCIs)
A GFCI is a device that de-energizes a circuit when a current to
ground exceeds a specified value that is less than that required
to blow the circuit breaker. GFCIs are intended to protect people
from electric shocks and are usually required in wet or damp
locations.
Installations in marine and recreational vehicles require GFCI
protection of branch circuits connected to the AC output of the
Freedom EX 4000.
DC Cabling (48VDC)
This includes all the cables and connectors between the
batteries, the DC disconnect and over-current protection
device, and the Freedom EX 4000. Most mobile installations
require multi-strand insulated cables for flexibility and durability
in high vibration environments and require disconnects and
over-current devices. Electrical wiring sizes in North America
are indicated by AWG notation. In other parts of the world, the
metric system is used. Under the AWG standard, a larger gauge
number indicates a smaller wire diameter. Wire size is usually
marked on the larger sized cables.
Table 2 specifies the
minimum recommended DC cable size and maximum fuse size
for the Freedom EX 4000.
The DC cables must be stranded,
copper, and must be rated 90 °C minimum. The cables
should be terminated with lugs that fit the DC stud terminals
snugly (
5
/
16
" hole size) and properly torqued according to
manufacturer-specified torque setting.
Inverter/charger/converter
Cable Length:
Battery to
Inverter (one
way)
Minimum
Cable Size
Maximum
battery
Fuse Size
Freedom EX 4000
Less than 5 feet
(1.5 meters)
No. 2 AWG
150 A DC,
time delayed
NOTE :It is not recommended using a cable longer than 5 feet (1.5 meters) in
each direction. North American cable sizes above are based on the US
National Electrical Code Table 310.15 - 75 °C cables, assuming an ambient
temperature of 30
° C cables.
Table 2 Required Cable (48VDC) Sizes
IMPORTANT : Using the correct cable size is critical to
achieving the rated performance of the Freedom EX 4000 unit.
When starting a heavy load the Freedom EX 4000 can draw
current surges from the battery of up to 250A. If the DC wiring is
too small the voltage drop from this surge will result in a voltage
at the Freedom EX 4000 terminals that is too low for the
Freedom EX 4000 to operate correctly. The Freedom EX 4000
may appear to operate correctly with smaller cables until a
heavy load such as a microwave or refrigerator attempts to start
- then the unit may work correctly sometimes and not work
correctly other times.
DC Disconnects and Over-Current Devices
The DC circuit from the battery to the Freedom EX 4000 must
be equipped with a disconnect and over-current device. This
usually consists of a circuit breaker, a “fused-disconnect”, or a
separate fuse and DC disconnect.
Do not confuse AC circuit
breakers with DC circuit breakers. They are not
interchangeable. The rating of the fuse or breaker must be
matched to the size of cables used in accordance with the
applicable installation codes. The breaker or disconnect and
fuse should be located as close as possible to the battery, in the
positive cable. Applicable codes may limit how far the
protection can be from the battery.
Surge Arrester
In a marine installation, each system requires a separate
method of protecting the DC circuits from a transient over-
voltage, also called a spike or short duration electrical surge.
This protection device is often referred to as a surge protection
device (SPD) or transient voltage surge suppressor (TVSS). An
SPD or TVSS must be mounted on the vessel's DC circuit
breaker panel according to marine electrical codes or
regulations.
DC Cabling (12VDC)
The cable size is dependent on the maximum cable size the
connector inside the unit is rated for, which is 6 AWG (16 mm
2
).
12VDC Load Panel
The DC load circuit from the Freedom EX 4000 must be
equipped with a 12V DC fuse or circuit breaker through a
12VDC load distribution panel.