4
System Description
The IVS1000 inverter series was designed electrically and mechanically to achieve optimal ruggedness
required for industrial, telecommunications, military and airborne applications.
Electrical Connections
The input can be grounded either on the positive or negative, or may be left floating. The output is normally
grounded, although it can be floating if required for specific applications.
Mount the unit as close to the battery as possible to avoid voltage drop and losses on the wires. The input
connections are via a 3-pole terminal block. GND, POS and NEG are clearly labeled. Although the unit
is reverse polarity protected, ensure that input is connected correctly. (On some models, the internal fuse
blows when reverse polarity occurs).
If operating the inverter from a power supply (instead of a battery), ensure that this source is capable of sup-
plying a significantly higher current than is actually required. It is preferable to turn on the inverter first, and
connect the load after the inverter is already running.
Input Wire Sizes
Input wire size is crucial for maximum efficiency and safety. For best results, the shortest length and largest
gauge wire should be used. Marine type battery terminals are recommended for attaching connectors to the
battery. Keep all connectors clean and free of corrosion. Refer to the following table for proper sizing. The
following values are to be used for guidelines only! The actual application must be considered for selecting
wire gauge, insulation, as well as EMI considerations for wire routing and shielding where necessary. For
longer wire lengths, larger gauge wire may be needed to minimize line losses.
RECOMMENDED INPUT WIRE SIZES
DISTANCE FROM BATTERY
MODEL
5’
10’
15’
20’
IVS1000-24V to 36V
AWG 4
AWG 2
AWG 0
AWG 00
IVS1000-48V
AWG 8
AWG 8
AWG 6
AWG 6
IVS1000-125V
AWG 10
AWG 10
AWG 10
AWG 10
IVS1000-250V
AWG12
AWG12
AWG12
AWG12
