Enatel DC System Manual
Page
12
of
26
Model: RWxxx
Version: 3.6
3.3
Cabling
It is important that all cables (except mains) are less than 3m in length. The rectifier is not
designed for cables greater than 3m or for connection to outside cables.
Figure 3: Cabling Architecture
Mains:
The length of the mains cable to the rectifier is not critical. The rectifiers only draw
300W or 700W and they will accept a wide range of input voltages. The mains cable to
the rectifier should be switched at its supply, so the rectifier can be isolated for installation
or servicing. It is recommended that a switched permanent outlet be used, so the rectifier
will not be accidentally unplugged from the supply.
Load and Battery:
Standard length cables are available from the rectifier supplier. It is
important that the lengths of these cables are kept to a minimum to reduce voltage drop
(the length of the cables should be adjusted). A fuse MUST be installed between the
battery and the rectifier, to protect the rectifier, load and battery. The fuse should be
mounted close to the battery, and have a high rupture current capability just above the
rectifier capability. This fuse protects the wiring and the rectifier from over current.
If the LVD functionality is not required, the load must still be connected to the Load
connection (not directly onto the battery). That is, connect all Load & battery connections
to load terminal only. Note the Auto Float Boost functionality is lost and the battery
subject to complete drain.
When custom made load and battery wires are used for most applications it is mandatory
that two wires are run in parallel for both the +ve and –ve Battery and Load connections.
1.5mm2 wire should be used for the connectors. In situations where voltage drop is a
concern, then a short length of 1.5mm2 wire should be used from the rectifier, connecting
to a longer length of large cross section wire. Connectors supplied for the rectifier are 4W
Batteries
Load
+
-
+
-
+
-
+
-
-
Fuse
+
-
+
-
Alarm Contacts
Load
Battery
Load Share/Monitor
Temp Comp
Mains
Alarm Contacts
+
-
+
-
Load
Rectifiers
Battery
Load Share/Monitor
Temp Comp
Mains
+
-
+
-
