OPERATION
Page
92
Copyright
Trace Engineering Company, Inc.
5916 - 195th Street N. E.
Arlington, WA 98223
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
SW Series Inverter/Charger
Part No. 2031-5
Rev. B: Sept 1, 1999
PEAK LOAD SHAVING MODE
IN BRIEF
The inverter can also be used to limit the maximum draw the AC loads place on the utility grid. Many
utilities impose a surcharge on their customers based on the peak load used by a facility. The SW Series
Inverter/Charger can be configured to provide all of the power above a specified level, eliminating the
surcharges. With the Control Panel, simply adjust the SET GRID (AC1) AMPS AC menu item to the
maximum value allowed by the utility without the peak load surcharge. All AC loads must be connected to
the output of the inverter through the 60-amp AC transfer relay located internally. Multiple inverters may be
required for larger applications with individual groups of loads connected to each inverter. This can be
used in addition to time of day metering and still allows the inverter to provide a utility back-up function in
addition.
This mode is also useful for applications where AC loads require more power than a utility connection is
able to supply. This often occurs in mobile applications where only a 15-amp outlet may be available. The
inverter can provide the excess power above the 15 amps when the load is operating. If this condition
occurs intermittently, then the inverter will be able to recharge the batteries between the heavy load
periods. This can eliminate the need to increase the size of a utility supply circuit, providing substantial
savings that can offset the cost of the inverter.
This mode is used in some vehicle applications to improve the power quality by reducing the load placed
on the AC line cord. The inverter provides the “start-up” power to eliminate brown out problems
experienced when starting air conditioners, etc. This also prevents tripping AC source circuit breakers
when heavy loads are operating.
AC LOADS
INVERTER/
CHARGER
UTILITY GRID
BATTERY
AC
AC
DC
Summary of Contents for SW II - REV 4.01
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