OPERATION
Copyright Trace Engineering Company, Inc.
5916 - 195th Street N.E.
Arlington, WA 98223
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
PS Series Inverter/Charger
Part No. 3597
Rev. D: November 23, 1999
Page
69
TRANSFER TIME
Normally there is no transfer time from the inverter to utility power or generator. The inverter operates in
parallel with the AC source at all times - even when battery charging. This allows the transfer from
inverter to the utility grid or generator to be interruption-free and virtually unnoticeable.
However, in SELL mode, when the utility grid fails, the inverter will reach the overcurrent protection
system setting (since it is will try to power everything that is connected to the grid). The inverter will
momentarily shut off while it opens the internal AC input relay. Once the relay has opened, the inverter
will begin to operate within a single cycle. This results in a 20-millisecond transfer period. Most AC loads,
including computers, will not be affected during the transfer.
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