Inverter Applications; Resistive Loads; Motor Loads - Xantrex XW4024-120 Operation Manual

Inverter Applications

Resistive Loads

Motor Loads

975-0240-01-01
p Are the battery cables adequately sized and short enough? See the XW Power
System Installation Guide for more information.
p Is the battery in good condition and are all DC connections tight?
p Are the AC input and output connections and wiring in good condition?
p Are the configuration settings correct for your particular installation?
p Are the display panel and the communications cable properly connected and
undamaged?
p Is the battery temperature sensor and its cable properly connected and
undamaged?
5. Contact Xantrex Customer Service for further assistance. Please be prepared
to describe details of your system installation and provide the model and
serial number of the unit. See page WA–1 for contact information.
The XW Inverter/Charger performs differently depending on the AC loads
connected to it. If you are having problems with any of your loads, read this
section.
These are the loads that the inverter finds the simplest and most efficient to drive.
Voltage and current are in phase, which means they are in step with one another.
Resistive loads usually generate heat in order to accomplish their tasks. Toasters,
coffee pots, and incandescent lights are typical resistive loads. It is usually
impractical to run larger resistive loads—such as electric stoves and water
heaters—from an inverter due to their high current requirements. Even though the
inverter may be able to accommodate the load, the size of battery bank required
would be impractical if the load is to be run for long periods.
Induction motors (motors without brushes) require two to six times their running
current on start up. The most demanding are those that start under load (for
example, compressors and pumps). Of the capacitor start motors (typical in drill
presses and band saws, for example), the largest you can expect to run is 1 hp.
Universal motors are generally easier to start. Check that the Locked Rotor Amps
(LRA) rating of the motor load does not exceed the maximum surge current rating
of the inverter. Since motor characteristics vary, only testing will determine
whether a specific load can be started and how long it can be run.
If a motor fails to start within a few seconds or loses power after running for a
time, it should be turned off. When the inverter attempts to start a load that is
greater than it can handle, the inverter may shut down from an AC Overload fault.
Inverter Applications
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