1
Planning Preparations
This guide for use by qualified personnel only.
AC Components
NOTE
: Unless otherwise referenced specifically by product
name, the components refer to
$XWR3RZHUDQG
inverter/chargers.
AC Input for Single AC Line Models
AC input (to a single AC line model such as
$XWR3RZHU
20
inverter/charger) can be supplied from a single-phase
120-volt 60-Hz AC source such as the utility grid (power
company), a generator, or the output of a transfer switch.
AC Input for Dual AC Line Models
AC inputs (to a dual AC line model such as
$XWR3RZHU
inverter/charger) can be supplied from a split-phase or dual-
input AC source such as the utility grid (power company), a
generator, or the output of a transfer switch. The
Auto Power
can be operated from the following types of 120 volt 60 Hz AC
sources:
•
Split phase
: This source type has two lines, one neutral,
and one ground. The two 120 volts AC lines are 180
degrees out of phase with each other, so that the two
voltages total to 240 volts AC line to line. The voltage
between each line and neutral is still 120 volts AC, and
the voltage between the neutral and ground is
approximately zero.
Because the two lines are out of phase, the currents from
each line subtract in the neutral, and the neutral current
will be approximately zero if the loads are equal. For
example, if Line 1 is supplying 20 amps and Line 2 is
supplying 15 amps, the current in the neutral will be
5 amps.
•
Dual input
: This source type has two line inputs, one
neutral, and one ground. Unlike the split-phase type, the
two lines are in phase (not out of phase), and must come
from the same source. The voltage between the two lines
is zero. The voltage between each line and the neutral is
120 volts AC, and the voltage between the neutral and
ground is approximately zero.
Because the two lines are in phase, the currents from each
line add together in the neutral. For example, if Line 1 is
supplying 20 amps and Line 2 is supplying 15 amps, the
current in the neutral will be 35 amps.
Summary of Contents for 091-269-12-2000
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