{"product_id":"victron-energy-itr000100101-autotransformer-for-split-phase-120-240v-100-amp","title":"Victron Energy ITR000100101 Autotransformer for Split Phase 120\/240V, 100 Amp","description":"\u003cp\u003e\u003cstrong\u003eAutotransformer - Split Phase 120\/240V - 100AMP\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eConsider 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.\u003c\/p\u003e\u003cp\u003e\u003cspan style=\"background-color: initial;\"\u003eTemperature protected In case of overheating, the Autotransformer is disconnected from the supply. Reset is manual.\u003c\/span\u003eGround 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)\u003c\/p\u003e\u003cp\u003eAn 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.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.victronenergy.com\/upload\/documents\/20150209_Warranty_final_en.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eWarranty Info\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/productimageserver.com\/prop65\/6pt.png\" alt=\"Warning\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e 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 \u003ca href=\"http:\/\/P65Warnings.ca.gov\"\u003eP65Warnings.ca.gov\u003c\/a\u003e.\u003c\/p\u003e\u003cstrong\u003ePlease contact your dealer for any returns, repairs or support issues related to this product.\u003c\/strong\u003e \u003c!--- cis2:m2lumZRk ---\u003e\n\u003cp\u003eThe Victron Energy ITR000100101 Autotransformer is designed to optimize power distribution in split phase 120\/240V systems. This robust autotransformer enables seamless step-up, step-down, and split phase output balancing, ensuring efficient use of your electrical capacity. Whether connecting to a grid, generator, or inverter setup, this device helps manage load imbalances and maximize power utilization.\u003c\/p\u003e\u003cp\u003eOne of the key features of this autotransformer is its ability to absorb load unbalance across the two 120V legs, which commonly occurs when connecting different appliances with varying power draws. For example, a high-wattage hairdryer on one leg and a washing machine on the other could cause significant current imbalance, leading to underutilized capacity and potential overloads. The Victron autotransformer alleviates this issue by creating a new neutral point, allowing the full 30A capacity to be utilized effectively while balancing the currents on each leg. This results in a practical maximum power draw of approximately 4.8 kVA at 20A unbalance, compared to the theoretical 7.2 kVA, ensuring safer and more efficient power management.\u003c\/p\u003e\u003cp\u003eBuilt with safety and reliability in mind, the autotransformer features temperature protection that disconnects the unit during overheating, requiring manual reset. It also includes a grounding relay compatible with Multi or Quattro inverter\/chargers, which is essential for proper GFCI operation in inverter mode and for grounding in split phase systems. This relay is controlled via the inverter\/charger, providing seamless integration into your power system. As an alternative to stacking multiple inverters, this autotransformer offers a compact, efficient solution to achieve split phase output from a single 240V inverter with an additional autotransformer.\u003c\/p\u003e\u003cp\u003eDesigned by Victron Energy, this autotransformer combines durability with advanced load balancing capabilities. It is ideal for applications requiring reliable split phase power distribution, such as off-grid systems, renewable energy setups, or backup power solutions. The device's compact construction facilitates easy installation and integration into existing systems, ensuring your power infrastructure operates smoothly and securely. For detailed installation and safety instructions, consult the included manual available online. Please note that this product may contain chemicals recognized by California Proposition 65, and proper handling is advised. For support or warranty information, contact your authorized dealer or visit the provided link.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDesigned for split phase 120\/240V systems with 100A capacity\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEnables load balancing across two 120V legs to optimize power use\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAbsorbs current unbalance to prevent overloads and maximize capacity\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eTemperature protected with manual reset in case of overheating\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBuilt-in grounding relay compatible with Victron Multi or Quattro inverter\/chargers\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eProvides an alternative to stacking multiple inverters for split phase output\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eRobust construction with compact design for easy installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIncludes safety features to ensure reliable operation in various power systems\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":44528969089066,"sku":"82998","price":509.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/82998XL.jpg?v=1783054333","url":"https:\/\/atticusgoods.com\/products\/victron-energy-itr000100101-autotransformer-for-split-phase-120-240v-100-amp","provider":"Atticus Goods","version":"1.0","type":"link"}