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    30 kVA Isolation Transformer, Single Phase, 110V to 220V

    $4,380.77
    SKU: ATO-T-DG30KVA
    30 kVA isolation transformer, single-phase distribution power transformer foe sale, step up 110V primary to 220V secondary voltage or step down 220V input to 110V output, LCD display voltage, aluminum wire or copper wire, low temperature rise.

    1500VA Toroidal Transformer, 230V to 12-0-12V/24V

    $490.65
    SKU: ATO-T-C1500VA
    Buy the best 1-phase isolated toroidal transformer with 1500 full capacity, 230V AC primary voltage to 12-0-12V/24V secondary voltage, small size and lightweight, has been widely used in household appliances and other electronic equipment with high technical requirements.

    2000VA Toroidal Transformer, 110V to 12V/30-0-30V

    $686.69
    SKU: ATO-T-C2000VA
    Single phase 2000VA isolated toroidal transformer step downs 110V AC input voltage to 12V AC or 2x 30V (30-0-30) output voltage at 50Hz/ 60Hz, can narrow the gap between the coil and the core, so has above 95% high efficiency. The output voltage can be customized according to customer-specific needs.

    2500VA Toroidal Transformer, 120V AC to 12V/40-0-40V

    $784.43
    SKU: ATO-T-C2500VA
    High-quality 2500VA (2500W) toroidal transformer for the power amplifier, high insulation strength, UL recognized, compact structure makes efficiency >90%. Single 120V/50-60Hz primary winding, designed to step down 120V to 12V/ 40-0-40V secondary voltage.

    3000VA Step-Down Toroidal Transformer, 240V AC to 12V/24V

    $916.54
    SKU: ATO-T-C3000VA
    Factory price 3000VA toroidal electronic transformer with 90%-60% high conversion efficiency, safe isolation and easy installation. It is designed to step down 50Hz/ 60Hz single phase 240 volt AC primary to 12 volts, 24 volt AC secondary, twin 24-0-24V (24V/1500V, 24V/1500V) output voltage is available.

    4000VA Toroidal Transformer, 110V AC to 220V/35-0-35V

    $1,356.79
    SKU: ATO-T-C4000VA
    4000W toroidal transformer works at single phase 50Hz/ 60Hz circuit system, can step up 110V AC to 220V AC or step down 110V to 35-0-35V AC output. It features high efficiency, lower loss, excellent voltage regulation, smaller size, light weight and low temperature rise, widely applied to the small adapter, lighting control circuit, air-conditioning equipment control circuit, medical equipment, monitoring equipment, and automation equipment control circuit.

    5000VA Toroidal Transformer, 230V to 50-0-50V

    $1,492.47
    SKU: ATO-T-C5000VA
    High power 5000VA (5000 watt) electric toroidal transformer is compact size and full cooper wire design, make the conversion efficiency up to 96%. 50Hz/ 60Hz low frequency, 1-phase 230V input voltage to dual 2x50V (50-0-50) output voltage, 12V/ 24V/ 48V single output is available for optional.

    Waterproof Toroidal Transformer, 12V/24V, 200W/300W

    $216.24
    SKU: ATO-T-C160W
    The Waterproof Toroidal Transformer is equipped with temperature protection, overload protection, short circuit protection, and other safety devices. With a power rating of up to 300W, it safely and effectively steps down 220V AC electricity to 12V/24V. With an IP67 protection rating, it is fully dustproof and can withstand immersion in water up to 1 meter deep for half an hour, making it suitable for various demanding environments.

    Toroidal Power Transformer, IP67, 400W/500W

    $258.23
    SKU: ATO-T-C400W
    Toroidal power transformer, with IP67 protection rating, is designed for demanding environments where durability and reliability are paramount. This toroidal transformer has 360W, 400W and 500W rated power and ensures efficient energy conversion with minimal electromagnetic interference. Its toroidal design offers superior performance with reduced core losses and noise, making it ideal for sensitive electronic applications.

    Toroidal Transformer, IP67, 220V to 12V/24V, 800W/1000W

    $315.68
    SKU: ATO-T-C800W
    Toroidal transformer, IP67, 220V to 12V/24V, 600W/800W/1000W/1200W is designed to provide robust and reliable power conversion in demanding environments. With an IP67 rating, this power transformer is fully protected against dust ingress and can withstand temporary immersion in water, making it ideal for both indoor and outdoor applications. The toroidal power transformer efficiently converts a 220V input to either 12V or 24V output, offering flexibility for various power requirements.

    4 kVA Isolation Transformer, 3 phase, 400V to 208V

    $1,424.21
    SKU: ATO-T-SG4KVA
    Reasonable price 4kVA isolation transformer, convert 3 phase voltage 400V input to 208V output, provides increased reliability and higher efficiency, make this step up/down transformer ideal for a wide range of applications.

    5 kVA Isolation Transformer, 3 phase, 480V to 400V

    $1,776.92
    SKU: ATO-T-SG5KVA
    3 phase 5 kVA isolation transformer is designed to step down/ up the voltage 480V to 400V, and widely used in various power supply sites with frequency 50Hz or 60Hz.

    6 kVA Isolation Transformer, 3 phase, 480 Volt to 380 Volt

    $1,889.55
    SKU: ATO-T-SG6KVA
    Three phase 6 kVA isolation transformer is dry type air self cooling one, which is available in the circuit of AC 50Hz/ 60Hz and convert primary voltage 480V to secondary voltage 380V, long life span and high efficiency.

    7 kVA Isolation Transformer, 3 phase, 380V to 208V

    $2,021.86
    SKU: ATO-T-SG7KVA
    7 kVA isolation transformer is a step up or step down transformer in low cost, 3 phase, convert primary voltage 380V to secondary voltage 208V, better dielectric strength and insulation resistance.

    8 kVA Isolation Transformer, 480V 3 phase to 240V 3 phase

    $2,333.08
    SKU: ATO-T-SG8KVA
    480 Volt 3 phase to 240 Volt 3 phase isolation transformer, 8 kVA power rating, primary and secondary windings are separated by aluminium/copper shield, 230 Volt, 400 Volt or othe voltages can be chosen, long life span and high efficiency.

    10 kVA Isolation Transformer, 3 phase, 400 Volt to 240 Volt

    $2,635.71
    SKU: ATO-T-SG10KVA
    Safety 10 kVA isolation transformer is suitable for circuit of 50 or 60Hz, 3 phase, primary voltage 400V to secondary voltage 240V. The transformers is high quality with lower cost, manufactured direct sale and fully compliant with reduced low voltage regulations.

    15 kVA Isolation Transformer, step up/step down 415V with 208V

    $3,203.97
    SKU: ATO-T-SG15KVA
    3 phase high quality isolation transformer with 15 kVA power rating, better dielectric strength and insulation resistance. Step up or step down transformer to change the voltage between 415V and 208V, suitable for both indoor and outdoor applications.

    20 kVA Isolation Transformer, 3 phase, 380V to 190V

    $3,853.97
    SKU: ATO-T-SG20KVA
    High performance 20kVA isolation transformer is designed to step down/up the 3 phase voltage 380V to 190V. Primary and secondary windings are separated by aluminium/copper shield, and widely used in various power supply sites with frequency 50Hz/60Hz.

    25 kVA Isolation Transformer, 3 phase, 380 Volt to 220 Volt

    $4,439.68
    SKU: ATO-T-SG25KVA
    3 phase 380V to 220V isolation transformer is 50/60 Hz rated, available with aluminium/copper wire winding material, the effective performance and high quality features make it ideal for use in the electrical and the engineering industries.

    30 kVA Isolation Transformer, 3 phase, 480 Volt to 415 Volt

    $5,129.37
    SKU: ATO-T-SG30KVA
    High efficiency 30kVA solation transformer is dry type air self cooling one, which is available in the circuit of AC 50Hz/60Hz and convert 3 phase voltage 480V to 415V, step up 415V to 480V is optional, low cost and manufactured direct sale.

    A transformer is an electrical apparatus designed to convert alternating current from one voltage to another. It can be designed to step up or step down voltages and works on the magnetic induction principle. When an AC current is passed through the primary coil, an AC magnetic flux is generated in the iron core, causing a voltage (or current) to be induced in the secondary coil. It is composed of an iron core and a coil. The coil has two or more windings. The winding connected to the power supply is called the primary winding, and the remaining windings are called the secondary winding.

    How Does a Electrical Transformer Work?

    Transformer mainly uses the principle of electromagnetic induction to work. The specific process is when an AC voltage U1 is applied to the primary side of the electrical transformer, and the current flowing through the primary winding is I1, the current will generate alternating magnetic flux in the iron core, which makes the primary winding and the secondary winding electromagnetically connections.

    Working principle of transformer

    According to the principle of electromagnetic induction, the electromotive force will be induced when the alternating magnetic flux passes through these two windings. Its magnitude is proportional to the number of winding turns and the maximum value of the main magnetic flux. The voltage on the side with more winding turns is higher, and the voltage on the side with less winding turns is lower. When the secondary side of the transformer is open, that is, when the transformer is no-load, the voltage at the primary and secondary terminals is proportional to the number of turns of the primary and secondary windings. That is, U1/U2=N1/N2, but the primary and secondary frequencies are consistent, so as to realize the voltage change. The working principle of the transformer can be understood from the figure below.

    What Types of Step UP & Step Down Transformer for Sales on ATO.com?

    Isolation transformer

    Isolation transformerIsolation transformer refers to a transformer with electrical isolation between the input winding and the output winding. It is widely used in the electronic industry or industrial and mining enterprises, machine tools and mechanical equipment in the general circuit control power supply, safety lighting and indicator power. It can completely insulate the electrical on the primary side and the secondary side, and also isolate the circuit. In addition, the high-frequency loss of its iron core is used to prevent high-frequency clutter from entering the control loop. Using an isolation transformer to suspend the secondary to the ground can only be used in occasions where the power supply range is small and the line is short. At this time, the capacitance current of the system to ground is too small to cause personal injury. Another important role is to protect personal safety! It can isolate people from dangerous voltages.

    Toroidal transformer

    Toroidal transformerToroidal transformer is a kind of step-up & step-down transformer power supply, which has the advantages of small volume, low noise, less heat and high performance. Generally, we use a variety of voltages, such as 220V for domestic lighting, 36V for industrial safety lighting, and the voltage of the welding machine needs to be adjusted. These cannot be separated from the toroidal transformer, which can step down the voltage we need through the principle of electromagnetic mutual inductance of the main and auxiliary coils. But how to improve the conversion efficiency of toroidal transformers has been a problem for many people. In fact, the conversion rate of a toroidal transformer is determined by the transformer's power, production materials, and its work site.

    Control transformer

    Control transformerControl transformer is a small dry-type transformer, which is mainly used to change the voltage of AC power. It is wound by an iron core and a coil. It can change not only the voltage of the alternating current, but also the impedance. When the design power is not exceeded, the current can also be changed. In different environments, the transformer also has different applications. Generally, it is used as a control lighting and indicator light source for electrical appliances in machine tools and mechanical equipment. The multi tapped control transformer can also be used in the chemical industry as a rectifier transformer. At this time, it is only required to rewire the adjustment taps of the control transformer, cut off all power to the equipment, and then adjust the voltage to the control transformer with voltage regulating equipment on both sides, so that it can be used in the chemical industry.

    Autotransformer

    autotransformerAutotransformer is a transformer whose windings are primary and secondary in the same winding, the primary and secondary windings are directly connected in series, and the transformer is self-coupled. Ordinary transformers transfer energy through electromagnetic coupling of primary and secondary coils, and there is no direct electrical connection between primary and secondary, while autotransformer has direct electrical connection between primary and secondary, and its low voltage coil is part of high voltage coil. Autotransformers are also used as protection equipment for communication lines.

    Since the calculated capacity of an autotransformer is less than the rated capacity. Therefore, for the same rated capacity, the main dimensions of the autotransformer are smaller and the effective material (silicon steel sheet and conductors) and the construction material (steel) are reduced accordingly, thus reducing the cost. The reduction of effective materials leads to a corresponding reduction of copper and iron consumption, so the efficiency of the autotransformer is higher. Also, due to the reduction of the main dimensions and mass, it is possible to manufacture transformers with larger capacities per unit under tolerable transportation conditions.

    What's the Functions of a Power Transformer?

    Ensure the safety of electricity

    There are many types of power transformers, but each type of transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Therefore, the use of each transformer can ensure the safety of electricity. By changing the AC voltage without changing the power source, the current can be changed, which essentially enables people to use electricity safely.

    Use transformer to step up and step down

    The transformer can make voltage step up & down. We often use various voltages. For example, we need different voltages for household lighting power and industrial safety power. All of these are inseparable from the transformer. Using the transformer, we can reduce the voltage to the required voltage through the principle of electromagnetic mutual inductance, and reduce the voltage loss.

    Impedance matching voltage

    This function is most commonly used in electronic circuits. Generally speaking, electronic factories will use transformers for impedance matching to make the signal flow smoothly. Therefore, companies that require different voltages in the same environment can manufacture multi-winding transformers to satisfy the daily needs of workers.

    Something Should be Known Before Operating the Transformer

    Before the step up or step down transformer is used, it should be fully tested to ensure the safe and stable operation. The detection of transformer before operation mainly includes the following points.

    • According to the requirements of actual production for transformers and the relevant national standards for transformer operation, the DC resistance and insulation resistance of transformers are tested.
    • They should be tested if they are in the specified range.
    • The safe operation of transformer has clear requirements for grounding, so grounding resistance and neutral grounding at low voltage side should be tested. Moreover, the standardization of shell grounding should be guaranteed. Check whether these grounding points are in accordance with the specifications and ensure the stability of the grounding.
    • Ensure that respirators and explosion-proof tubes are within specified requirements, and check whether damp agent and explosion-proof film can be used properly.
    • Check all the wire connections of the transformer, and guarantee the firmness of wiring and the correctness of phase matching.
    • Check the performance of each sealing device to ensure good tightness, particularly the vent valve, casing pipe and oil cover, prevent the leakage caused by poor sealing.
    • Check whether the oil level in the conservator is consistent with the operating environment.