Non-toxic Victron Energy Autotransformer - Split Phase 120/240v - 100amp [itr000100101] - Beat The Rush [9CeROrAf]

Non-toxic Victron Energy Autotransformer - Split Phase 120/240v - 100amp [itr000100101] - Beat The Rush [9CeROrAf]

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 autotransformer’s 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.

Once purchased and in use, this product is non-returnable.

Product Specifications

Non-toxic Victron Energy Autotransformer - Split Phase 120/240v - 100amp [itr000100101] - Beat The Rush [9CeROrAf] Product Specifications

Electrical Specifications

• Input Voltage: 120V or 240V AC (split-phase)

• Output Voltage: 120V, 240V, or 120/240V AC depending on use

• Frequency: 50/60Hz

• Amperage: 100A continuous

• Power Rating: Up to 12,000 VA

• Transformer Type: Toroidal autotransformer

• Wiring: L1, L2, Neutral, Ground (4-wire system)

Key Features

• Balances loads across legs in split-phase 120/240V systems

• Functions as a step-up (120V to 240V) or step-down (240V to 120V) transformer

• Reduces neutral-to-ground voltage in AC systems

• Suitable for residential, marine, and mobile power setups

• High-efficiency design with low electromagnetic interference

• Overload protection available via external breaker or fuse setup

Physical & Environmental

• Portable: No

• Enclosure: Vented steel casing

• Cooling: Natural convection

• Mounting: Wall or panel mount

• Operating Temperature: –20°C to +60°C (derates above 40°C)

• Box Dimensions: 8" H × 13" W × 20" L

• Weight: 30.55 lbs

• UPC: 8719076022428

Product Manual

Quick Guide (pdf)
Owner's Manual (pdf)
Brochure (pdf)

Product Warranty

Victron Energy Product Warranty

Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the end-user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead-acid batteries; 2 years from date of purchase by the end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries; 3 years from date of purchase by the end-user. In addition to this, proof of correct battery usage is required when making a battery warranty claim.

For a 10% surcharge on the net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before expiration of the original term.

During the warranty period, Victron Energy will, at its discretion, repair, replace or credit the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation, and re‐installation. This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:

• Reverse of battery polarity.

• Inadequate connection.

• Mechanical shock or deformation.

• Contact with liquid or oxidation by condensation.

• Use in an inappropriate environment(dust, corrosive vapor, humidity, high temperature, biological infestation...). 

• Breakage or damage due to lightning.

• Connection terminals and screws destroyed or other damages, like overheat, due to insufficient tightening.

• For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/output X and Y capacitors determine the warranty.

This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone else than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.

Repair, replacement or credit are our sole remedies and Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.

Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products. If Victron Energy repairs or replaces a part of a product, its warranty term is not extended.

All remedies and the measure for damages are limited to the above.

Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages. Any and all other warranties expressed or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to a period of five (5) years from the date of purchase, with the exception of batteries. For lead acid batteries a two (2) year period applies and for lithium batteries a three (3) year period applies.

Product FAQs

N/A