Advanced Transformer Search Transformers are vital in the manufacturing industry as they ensure that the power supplied meets the voltage requirements of various equipment and machines, ensuring safe and efficient operation. Surplus Record has over 5,000 transformers of different types, sizes, and functions for sale. This powerful search tool allows you to instantly search all transformers for sale, helping you connect with sellers to get the transformer you need. Choose a Category(s)Three Phase Transformers 60 Hz Three Phase Transformers 60 Hz Three Phase Padmount Transformers 50 Hz Three Phase TransformersSingle Phase Transformers 60 Hz Single Phase Transformers 60 Hz Single Phase Padmount Transformers Single Phase Pole Mount Transformers Type: KVA MVA KVA Low: KVA High: Primary Volts: sort: count+ Expand Secondary Volts: sort: count+ Expand Reset RFQ ListHere is the list of listings you added to submit multiple RFQs. You can add up to 10 listings. Once you have added the listings you are interested in, click on the Submit RFQs button to finish your request."*" indicates required fieldsName*Company*Email* PhoneZip / Postal Code*QuestionMake an OfferRequests Send me a shipping quote I am interested in financingSend Copy Email me a confirmation of this inquiryBuyer Protection Use our partner Escrow.com to buy or sell equipment safelyBuyer Protection Send me info about buyer protectionThis field is hidden when viewing the formDealer Email Submit RFQs"*" indicates required fieldsName*Company*Email* PhoneZip Code*QuestionRequests Send me a shipping quote I am interested in financingSend Copy Email me a confirmation of this inquiry Submit RFQsElectric Transformer TypesWhen it comes to transformers, you have single phase and three phase transformers. From there, within each one, there are various types of transformers such as step-up transformers, oil filled transformers, dry transformers, padmount transformers. Padmount transformers are easily distinguishable from other transformers as they are ground-mounted units, typically encased in tamper-proof, locked cabinets. Pole-mount transformers are elevated on utility poles, primarily used to step down distribution voltage to a usable level for homes and small businesses. Below are the most popular types of transformers that the advanced search above will help you find and buy. Dry Type TransformersUses air instead of liquid coolant to maintain temperature. These are safer are more environmentally friendly, typically used indoors where safety is paramount. Oil Filled TransformersCore & windings are immersed in insulating oil that acts as a coolant & electrical insulation for internal components. Padmount TransformersEncased in a metal cabinet and are ground mounted. Typically found in residential neighborhoods or commercial complexes. Polemount TransformersPole-mount transformers are elevated on utility poles, primarily used to step down distribution voltage to a usable level for homes and small businesses Step Up/Down TransformersStep-up/down transformers change the voltage level by either increasing (step up) or decreasing (step down). These help transmit power efficiently across vast distances or meet specific requirements for a certain application. Substation TransformersOften called "Sub type" these help Step Down voltage for residential/commercial use. They distribute electrical power ensuring correct voltage levels for various applications. Often found behind fences in transformer distribution yards.New Listings 25 KVA 19900/34500Y Primary 120/240 Secondary, XMFR ... Single Phase Pole Mount Transformers 42/56/70 MVA 230 KV Wye Primary, 13.8 KV Secondary ... 60 Hz Three Phase Transformers 2500 KVA 12470 Primary, 480/277 Secondary, ABB, FR3 ... 60 Hz Three Phase Padmount Transformers 2500 KVA 12470 Primary, 480/277 Secondary, ABB, FR3 ... 60 Hz Three Phase Padmount Transformers 50 KVA 7200x14400 Primary, 120/240 Secondary, JSHP ... 60 Hz Single Phase Padmount Transformers 3000 KVA 13800/12470 Delta Primary, 415 Wye Secondary ... 60 Hz Three Phase Padmount Transformers 42/56/70 MVA 230 KV Wye Primary, 13.8 KV Secondary ... 60 Hz Three Phase Transformers 75 KVA 240 Delta Primary, 480Y/277 Secondary, Step Up ... 60 Hz Three Phase Transformers 15 KVA 240/480 Primary, 120/240 Secondary, Square D ... 60 Hz Single Phase Transformers 145 KVA 380 Primary, 460Y/266 Secondary, Hevi-Duty 3 ... 50 Hz Three Phase TransformersElectric Transformer FAQs Difference between a 3-Phase and a 1-Phase Transformer?A 3-phase transformer is designed to operate on a three-phase power system, which means it can handle three alternating currents (AC) that are phase-separated by one-third of a cycle, or 120 degrees electrical. This design makes 3-phase transformers highly efficient for distributing large amounts of electrical power over long distances and especially suitable for powering large motors and heavy machinery in industrial and commercial settings.A single-phase transformer operates on a single-phase power system, which involves only a single AC voltage cycle. These transformers are typically used in residential areas or for light commercial applications where the power demands are relatively low. Single-phase transformers are simpler in design and are used to step down or step up voltages for household appliances, lighting, and smaller commercial units. Should I Buy Used or New Transformer?Choosing between a used or new transformer depends on factors like budget, warranty, immediate availability, and specific requirements. New transformers come with the latest technology and full manufacturer warranties but at a higher cost. Used transformers can be more budget-friendly and available for quicker delivery but might carry risks regarding their condition and lifespan. It’s crucial to assess the reliability of the supplier and the transformer’s condition, including any refurbishments or certifications, to ensure it meets your operational needs. Surplus Record has some of the best transformer dealers in the world that all offer certificates with their transformers showing that they were fully tested and ready to be put in service. What matters most when buying a transformer?Check if the primary and secondary voltage specs align with your electrical system or machines. Dive into the the load and capacity requirements to find a fit that matches the power demand you will need. Also, look closely at the insulation and cooling systems; they play a crucial role in keeping things running smoothly. These are the key points to to pay attention to, ensuring that the transformer is a solid match for your shop’s voltage and workload requirements. What are common signs of transformer issues?Keep an eye out for irregularities such as overheating, unusual noises, or oil leaks. These indicators may suggest internal problems or insulation issues. Fluctuations in voltage, frequent tripping, or electrical surges can also signal potential transformer issues. Regular inspections, temperature monitoring, and thorough testing help in detecting problems early on, ensuring the reliability and longevity of the transformer. Popular Types of Transformers in Machine Shops?In machine shops, the most popular transformers include isolation transformers, which protect equipment from electrical noise and provide safety; step-down transformers, used to reduce voltage for machinery operation; and control transformers, designed to supply voltage to control devices within machines. These transformers are essential for ensuring the safe and efficient operation of various machine shop equipment, providing precise voltage regulation and isolation from potential electrical hazards. How do Transformers Work?Transformers work by transferring electrical energy between two or more circuits through electromagnetic induction. A primary coil receives alternating current (AC), creating a magnetic field. This field induces a voltage in a secondary coil, with the voltage change determined by the ratio of turns between the coils. If the secondary coil has more turns, the voltage increases (step-up transformer); fewer turns decrease the voltage (step-down transformer). This process allows for efficient transmission of electrical power at different voltage levels without changing the total electrical energy.