SKU: 75597349639

Victron Autotransformer - Split Phase 120/240V - 100AMP

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Description

Victron Autotransformer - Split Phase 120/240V - 100AMPAutotransformer Split Phase 120 240V 100AMP The Autotransformer: for step up, step down and split phase balancing An autotransformer can be used for step up, step down and split phase output balancing purposes. While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention. Consider for example a 30A 120 240V split phase supply. The supply could be the grid, a generator or two stacked

Autotransformer - Split Phase 120/240V - 100AMP

The Autotransformer: for step up, step down and split phase balancing An autotransformer can be used for step up, step down and split phase output balancing purposes. While the step up and step down functions are fairly straightforward, split phase output balancing may require some more attention.

Consider for example a 30A 120/240V split phase supply. The supply could be the grid, a generator or two stacked inverters. Some of the loads connected are 240V, others are 120V. On each 120V leg the load should not exceed 30A. The problem is that as soon as 120V loads are connected, the two legs will show a different current. This is because the 120V loads on the two legs will never be balanced. A 120V 1200W hairdryer, for example, will draw 10A from one leg. A 120V washing machine could even draw in excess of 20A from one leg. Between the two legs the difference in current, or current unbalance, will therefore often be 20A or more. This means that the 30A supply will not be used up to its full potential. By the time one leg draws 30A, the other leg may be drawing no more than 10A, and increasing the 240V load, for example, will result in an overload of one leg while the other leg still has spare capacity. Theoretically, the total power that can be drawn from a 30A 120/240V supply is 30 x 240 = 7,2 kVA. In case of 20A unbalance, the practical maximum will be 30 x 120 + 10 x120 = 4,8kVA, or 67% of the theoretical maximum. The solution is an Autotransformer. By leaving the neutral of the split phase supply unused, and connecting an Autotransformer to create a new neutral, as shown in figure 1, any load unbalance is absorbed by the Autotransformer. In case of a 30A supply, the load can be increased to 7,2kVA, and a 20A load unbalance will result in one leg supplying 40A, and the other leg 20A. The 20A difference will flow through the neutral and the windings of the Autotransformer. The current through both 120V wires of the split phase supply will be 30A.

Temperature protected In case of overheating, the Autotransformer is disconnected from the supply. Reset is manual.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 autotransformers 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)

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.

Warranty Info

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

Please contact your dealer for any returns, repairs or support issues related to this product.
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SKU: 75597349639

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AshU2010
San Leandro, US
★★★★★ 5
Got water in the face just a few weeks after purchase
Color: Gold Silver Band and White Face, Color: Gold Silver Band and White Face
UPDATE: After leaving this review OLEVS Amazon customer service contacted me. I was given a full refund for the watch. Much better customer service!!!! The watch is heavy enough and looks nice but a few weeks after having it water got in the face of it. Contacted OLEVS and they basically told me they couldn’t help me since I didn’t buy it from their official site. They don’t offer support for Amazon purchases. Of course it is past the Amazon return window.
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Reviewed in the United States on May 23, 2026
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OLIVER HARRIS
Belleville, US
★★★★★ 5
Great look for a Great price
Color: G2856-gold-blue
Classic look for a great price. Came with a tool to remove links if needed to adjust size
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Reviewed in the United States on May 31, 2026
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liliana
Carnegie, US
★★★★★ 4
It’s alright
Color: Black Band and Black Face, Color: Black Band and Black Face
it’s a bigger watch definitely need to take some links out and the adjustment tools are not the best at all they break very easily. but other than that the watch is very pretty. it does have some weight to it but not completely heavy
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Reviewed in the United States on January 23, 2026
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Gavin
Waukegan, US
★★★★★ 5
Its ok
Color: G2856-all silver
Its a nice watch but the band feels a little cheap the adjustment tool broke on me but overall nice looking watch for the money UPDATE: they are giving me a watch of my choice instead of a refund i really love this watch it looks amazing iv been getting compliments left and right 5/5 star's would buy again
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Reviewed in the United States on May 28, 2026
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Corey
Birmingham, US
★★★★★ 5
Amazing Quality & Price
Color: Black Band and Blue Face, Color: Black Band and Blue Face
Exactly as described. It looks absolutely stunning in person. It's very lightweight. Adjustable metal band with tool for ejecting the pins and band pieces. Movement around my wrist feels great and not pinching my arm hairs. Extremely easy to use and set up. Fits perfectly after making some minor adjustments on the band. Battery life promise of 10 years.
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Reviewed in the United States on May 17, 2026

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