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Victron Autotransformer 120 240VAC-32A Manual

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Ground relay for use with Multi or Quattro inverter/chargers
included
When operating in inverter mode, the neutral output of the inverter/charger must be
connected to ground to guarantee proper functioning of a GFCI. In case of a split phase
supply the neutral must be grounded. For this purpose a grounding relay is built in the
autotransformer enclosure. The relay is controlled by the 230/240V Multi or Quattro. (The
internal grounding relay in the 230/240V Multi or Quattro must be disabled)
Temperature protected
In case of overheating, the autotransformer is disconnected from the supply. Reset is
manual.
An alternative to stacked inverters
The alternative to stacking two 120V inverters to provide a 120/240V split phase supply is a
240V inverter with an additional autotransformer.
Two stacked 120V 3kVA inverters will supply up to 25A to each 120V leg. If the load on one
leg is less than 25A, the maximum load on the other leg is still limited to 25A.
One 240V 5kVA inverter with a 32A autotransformer will supply up to 21A of balanced load
to each 120V leg. Less load on one leg will however result in more power being available on
the other leg, with a maximum unbalance of 32A.
Therefore the load can be up to 38,5A on one leg if the load is not more than 3,5A on the
other leg. (maximum unbalance: 38,5 – 3,5 = 35A). If load unbalance is to be expected, a
lower power 240V inverter with autotransformer will therefore be preferable to the stacked
inverter solution.
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