Inverter Applications; Resistive Loads; Motor Loads; Problem Loads - Xantrex PROSINE 2.0 User Manual

Inverter Applications

The i nverter•charger performs differently depending on the AC loads
connected to it. If you are having problems with any of your loads, read this
section.

Resistive Loads

These are the loads that the inverter finds the simplest and most efficient to
drive. Voltage and current are in phase (i.e. 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 can most likely accommodate the load, the size of battery bank
required would be impractical if the load is to be run for long periods.

Motor Loads

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 (e.g. compressors and pumps). Of the capacitor start motors (typical in
drill presses, band saws, etc.), the largest you can expect to run is 1/2 to 1 hp
(the transfer relay is rated at 1 1/2 hp.) Universal motors are generally easier to
start. 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, it will turn itself off after a few seconds.

Problem Loads

Very Small Loads
If the power consumed by a device is less than the threshold of the Load Sense
mode circuitry, the device will not run. See the
Menu‚" on page 47
page 48
defeat the Load Sense mode feature.
Fluorescent Lights & Power Supplies
Some devices cannot be detected when scanned by Load Sense circuitry.
Small fluorescent lights are the most common example. Some computers and
sophisticated electronics have power supplies that do not present a load until
line voltage is available. When this occurs, each unit waits for the other to
445-0089-01-01
and the "Configure PROsine—Advanced Menu‚" on
for ways to solve this problem. Most likely the solution will be to
S 6 T
ECTION ROUBLESHOOTING
"Configure PROsine—Basic
81