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Copyright 2003 OutBack Power Systems, Inc. FX & VFX Series Inverter/Charger System Installation & Programming Manual
19009 62
nd
Ave NE, Arlington WA 98223 USA 900-0027-1
Tel 360 435 6030 Fax 360 435 6019
Rev 7.2 08/26/05 Page 33
MOBLIE FX INFORMATION
Dual Input Transfer Switch Setup
In many cases, systems will have the option of using either an onboard generator or the utility grid (shore power) as their AC input.
When this is the case, both the AC “Hot” and AC “Neutral” lines must be connected to the appropriate source. Currently, OutBack
Power Systems does not produce a product that will accomplish this function. Therefore, the consumer must purchase a device that
accomplishes this task. The simplest form of this device is a double-pole, double-throw switch. The words “double-pole” indicates that
there are two connections, one for AC “Hot” and one for AC “Neutral”. The words “double-throw” indicate that there are two sets of
poles that can be contacted. This switch must be rated to handle the maximum AC voltage and AC current that it will see. When using
a “Mobile” FX with an onboard generator and a connection that can be made to “shore power”, refer to the diagram below. The
“Mobile” FX’s AC input consists of a Hot (H), Neutral (N) and Neu/Ground Bond (G). The “Mobile” FX has an internal “Ground-
Switching Contact” that will open when it connects to an AC input. This allows the FX to make the neutral-ground bond when an AC
input is not connected yet, when an AC input connects, the neutral-ground bond will be released by the FX and made by the AC input.
If the system is 120/240 VAC with 120/240 VAC inputs, a Triple-Pole Double-Throw Switch is required.