Step up transformer 240 to 480

Isolation Transformer 75 kVA • Single Phase • Primary: 240/480 Volt • Secondary: 120/240 Volt. Conductor: Aluminum. • Frequency 60 Hz. Full Specification. Optional Features. Single phase Isolation Transformer SA75L-K/Z3 has primary and secondary windings that are physically separated from each other. It allows AC power to …

GE 150 kVA 480 Delta to 240/120 Delta V 3PH Dry Type Transformer 480V 240V. $2,950.00. $525.00 shipping. or Best Offer. A step up transformer is an electrical device that converts low voltage (LV) and high current input from the primary portion of the device to high voltage (HV) and low current output from the secondary section. A step down transformer performs the opposite purpose. A step up transformer is a crucial component of any electrical system.Transformers 15kVA and higher that meet DOE 2016 legislation will help lower operating costs, lower cost of ownership, increase profitability, and reduce overall greenhouse gas emissions. In addition to energy efficient transformers and general application three phase transformers, you can choose from the following additional types of transformers: 1Transformers are available in the standard ratings and configurations shown or can be customized to meet specific needs. Table 3. Impedance Voltage Rating (kVA) Low-voltage rating ≤ 600 V 2400 Δ through 4800 Δ 6900 Δ through 13800GY/7970 or 13800 Δ ... • Step-up • Critical applicationThis transformer is used as a step up transformer (240 to 480). This is the only 480 volt machine in the building, everything else is 240V 3-Phase. There are only three wires connected to the high side, and three wires connected to the low side fo the transformer. The neutral is not connected anywhere on this transformer.Generally, if the transformer is mentioned by 11kV/415V means, it is called step-down transformer, the input will be given as 11kV and the output will be connected to 415V. At the same time, the transformer is mentioned by 22kV/220kV means, it is called a step-up transformer. The input will be 22kV and the output will be 220kV.

Step-up transformer to convert 3-phase 240V Delta to 3-phase 480Y/277V. Perfect for panels, motors, CNC machines, welders, conveyor systems, pumps, and more. ... This transformer is designed to convert 3-phase 240v to 3-phase 480 Y 277 to run equipment such as panels, motors, CNC machines, welders, conveyor systems, pumps, printing …A 1 Phase Step-up Transformer is an electrical device designed to convert a 3 phase 480V voltage into a single phase, 240V output. It works by transforming the …Transformers increase voltage, decreasing current in power systems. Lower I means less power loss due to I2R losses in lines, cables, transformers, etc Generator Step up transformer I V Step down transformer V I Three phase transformers 3 single-phase units can form 3-phase bank or Single three-phase transformer (3 separate cores in a single tank) Oct 6, 2023 · Sizing a step-up transformer involves considering the desired output voltage, input voltage, and power requirements. You can estimate the size based on the ratio of input to output voltage and the load power in kVA (kilovolt-amperes). For example, if you need to step up 480V to 208V with a load of 100 kVA, you’d need a transformer with a kVA ... I'd go with transformer, but since if you take all your HP the highest number it is possible to come up with is 6 1/3 HP, the KVA on the transformer can be 12 or 15 instead of 30, and you would be better off with a straight 480/240 transformer. Acme makes them, I bought a new three phase dry type general purpose 3KVA from them.No. The total current from the 50 KVA transformers should not exceed the original mains current of 200A.

Transformer Size Calculator. When sizing a transformer, you need to know the kilovolt-amps (KVA) that your machine requires. This tool will allow you calculate the KVA that you need. This tool only evaluates common voltages for North America (ie. 24v, 120v, 208v, 240v, 480v, and 600v). If you have a Eurpoean voltage or something else that is ...Siemens MT0150A Industrial Power Transformer, Domestic, 240 X 480, 230 X 460, 220 X 440 Primary Volts 50/60Hz, 120/115/110 Secondary Volts, 150VA Rating , Black. 3.3 out ... T Series 2000 Watt Voltage Converter Transformer - Step Up/Down - 110v to 220v / 220v to 110v Power Converter - Circuit Breaker Protection, CE Certified [3-Years Warranty ...Industrial Control Transformers, Primary Voltage of 240/480V, Secondary Voltage 120/240 with Power Rating of 25VA to 1500VA. (630) ... Step down control transformer from 240 volts or 480 volts to 120 or 240 volts. Can be used in step-up applications too. Product Features.In today’s competitive business landscape, finding and connecting with potential customers is crucial for the success of any company. Traditional prospecting methods can be time-consuming and often yield limited results.

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Transformer capacity is rated in KVA (kilo-volt-amperes). The load voltage and load amps must be known to calculate KVA rating. * NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 to get the minimum KVA rating needed. All values should be …Description: We offer a complete line of control transformers for machine tools, electromagnetic devices, and industrial applications, which include multi-tap, step-up, step-down, open core, and encapsulation. Our control transformers are constructed with high-quality silicon steel lamination . Maximum Primary Voltage Rating: 100 to 600 volts; …Brand: Romanoff Power: 208/240/480V DELTA 400/230V Application: Step-up 220V to 380/480V For use with: Yasui K2 NEXT, RBF 37+, RBF 21+ Amp: 30 Transformers 15kVA and higher that meet DOE 2016 legislation will help lower operating costs, lower cost of ownership, increase profitability, and reduce overall greenhouse gas emissions. In addition to energy efficient transformers and general application three phase transformers, you can choose from the following additional types of transformers:Filters · Three Phase Transformer, Input 480VAC Delta · Three Phase Transformer, Input 208VAC Delta · Three Phase Transformer, Input 240VAC Delta · Three Phase ...E. 240/480 Volt Primary Single Phase Isolation Transformers. TEMCo Single Phase Isolation Transformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty.

... 240 Volt Single phase Isolation Transformer SC250H-K/Z3, Home · Autotransformers · Isolation Transformers · - Distribution Transformers · - Step Up Transformers ...If the motor wants a full 230 volts, use two autotransformers in open delta. The cost of the two auto-transformers and a larger contactor is usually much less than the cost of a 208:480 volt transformer. (460 volt motors are commonly used on 480 volt systems. 208:480 is a more common transformer voltage than 208:460.A pair of transformers; one to step up the source voltage, ... Even running 240 volts and then a 120/240 transformer at load end is worth consideration. @ 2000 VA that is only 8.3 amps, would need larger conductor than if 480 or 600 V but only need one transformer instead of two.Step-up transformer to convert 3-phase 240V Delta to 3-phase 480Y/277V. Perfect for panels, motors, ... 480 Y 277 (Step Up Transformer) SKU # MIT-DRY-139. In stock! Delivers in 5-7 business days. Add to Cart Buy Now ... 240 Delta. Secondary Voltage. 480 Y 277. Transformer Specifications. 60 Hz Frequency;Transformers increase voltage, decreasing current in power systems. Lower I means less power loss due to I2R losses in lines, cables, transformers, etc Generator Step up transformer I V Step down transformer V I Three phase transformers 3 single-phase units can form 3-phase bank or Single three-phase transformer (3 separate cores in a single tank) 1 Answer. Yes and no. Yes you can use a transformer in reverse. The no part has to do with the transformer's design. Secondary or output windings are low impedance to reduce losses and increase efficiency. This is a problem when wiring it in reverse as the low impedance will cause a large inrush current when powering up the …High-Efficiency AC to AC PhaseTransformers for Light Loads. Run your motor at 100% or normal power. Also known as rotary converters. Choose from our selection of AC to AC voltage transformers, including over 200 products in a wide range of styles and sizes. In stock and ready to ship. High-Efficiency AC to AC PhaseTransformers for Light Loads. Run your motor at 100% or normal power. Also known as rotary converters. Choose from our selection of AC to AC voltage transformers, including over 200 products in a wide range of styles and sizes. In stock and ready to ship.E. 240/480 Volt Primary Single Phase Isolation Transformers. TEMCo Single Phase Isolation Transformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty. • UL Listed, CSA ...

1Transformers are available in the standard ratings and configurations shown or can be customized to meet specific needs. Table 3. Impedance Voltage Rating (kVA) Low-voltage rating ≤ 600 V 2400 Δ through 4800 Δ 6900 Δ through 13800GY/7970 or 13800 Δ ... • Step-up • Critical application

45KVA 208-480/277 3 phase Step Up 75KVA 240-480Y/277 3 phase Step Up 150KVA 208-480Y/277 3 phase Step Up 150KVA 240D-480/277Y 3 phase Step Up 225KVA 208-480Y/277 Y 3 phase Step Up 300KVA 208V-480V 3 phase Step Up 75KVA, 480D to 480Y/277V, 3 Phase 112.5KVA, 480 Delta to 480Y/277V, 3 P hase UPS Sizes available: UPS 1000VAPrimary Voltage: 240 Delta. Secondary Voltage: 480 Y 277. Transformer Specifications: 60 Hz Frequency. 150°C Temperature Rise. Primary Adjustment Taps 2 above, 4 below in 2.5% increments. High Efficiency Aluminum Windings. 220°C Insulation Class. Vacuum pressure Impregnated Windings.Step-Up/Step-Down. AC to AC Transformers. Improve the efficiency of your equipment— wire these transformers to step your input voltage up or down by as much as 20%. Choose an input/output voltage combination that comes closest to matching your application, then choose the power output (in VA) of the equipment you want to operate. Sizing Guide for Dry Type Transformers Single Phase Transformers Primary Voltage Main Breaker kVA Rating Primary Lugs Secondary Lugs 208V 80A 15 100A 100A 208V 150A 25 250A 250A 208V 200A 37.5 250A 250A 208V 225A 50 400A 400A 240V 80A 15 100A 100A 240V 150A 25 250A 250A 240V 200A 37.5 250A 250A 240V 225A 50 400A 400AWhich leaves you with 203 volts on the other side of the tap - should only allow using 58% of the transformer kVA rating also unless you are able to connect some lights as 208 volt loads. Yeah, I missed the 240v primary requirement. But then you could have a 240v to 480v with a 277v tap single phase xformer wound.Nov 29, 2005 · what would the calculations be for line and load if we have 240v 3-phase and step-up to 480v if the 480v equip. is rated for 3-phase 40 amps.i am using a 45kva 3-phase transformer 480-240v and reverse the connection.what size breakers would i need on the line and load side.thanks 240V AC Delta; 480V AC Delta; Output Voltage - Transformer. 120V AC; 120V AC Center Tap; 208V AC Wye; 240V AC Delta; ... Step Down; Step Up; Brand. ACME ELECTRIC; DAYTON; SQUARE D; Price. Min. Only digits are allowed. Maximum amount of digits: 6. ... smooth voltage transformation at 480VAC input. Transformers 15kVA and higher that meet DOE 2016 ...

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Get Complete Step-Down/Step-Up and Isolation Protection. S3MT-100KWR480V includes two transformers in a single cabinet: a 480V (Delta) to 208V (Wye) input isolation step-down transformer and a 208V (Wye) to 480V (Wye) output auto step-up transformer. It isolates the UPS and connected components from line surges and spikes caused by …75 kVA Transformer - 208V Delta Primary Voltage - 480V Delta Secondary Voltage - NEMA 3R3-Phase Delta Buck/Boost Step-Up Transformer - 480V Primary - 575V Secondary - 129 Amps - 50/60HzGet the best deals on Step-up 3 Phases Electrical Transformers when you shop the largest online selection at eBay.com. Free shipping on many items ... New Listing Westinghouse DT-3 45KVA Transformer 480-208Y/120 V. $756.00. Was: $840.00. ... HEVI-DUTY HS1F500A General Purpose Transformer 240/480V - 120/240V. $65.00. …1 Step up or down is (mostly) irrelevant, it's just a ratio change. – JRaef Oct 18, 2018 at 1:45 1 Another comment you mention equipment at 400, 440.15kVA Dry Type Transformer, 480 - 208Y/120 Volt Step Down, 3 Phase - New, 3R. Free shipping. ... 15.00 KVA Westinghouse Dry Type Transformer 240/480 PRI-120/240 SEC Volt 1 Phase. ... or Best Offer. Only 1 left! NEW FPE 3 Phase Step Up Transformer 208 to 480Y/277 T20LH42-15 15 KVA t862. or Best Offer. 14 watching. HITRAN TYPE DIT 3PH …10 KVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, General Purpose Transformer, Sand and Resin Encapsulated, 115 Degree C, Aluminum Windings, 60 Hz operation (50/60 Hz optional), Frame Size: FR179. Transformer, 25 kVA. 25 kVA; Step down 480V to 120/240V 1-phase; Power your job site trailer and other 480V loads from the same power source; Lifting provisions and forklift pockets for portability; Power distribution equipment available to complete your temporary power system; Uses: Ideal to power worksite trailers and 480V loads from the same ... Voltage change is just a winding ratio, so the ratio from 120 to 240 is 2:1, the same as 240 to 480V. The problem is, voltage DESIGN is based on things like creepage distances and air separation, plus electrical dielectric properties of the insulation used. A cheap 240-120V transformer most likely will not be made with the proper clearances you ...This transformer is designed to convert 3-phase 240v to 3-phase 480 Y 277 to run equipment such as panels, motors, CNC machines, welders, conveyor systems, pumps, printing equipment, fabrication tools, and other business machines. Not sure what to buy? Find out more about how to buy the right transformer. Primary Voltage 240 Delta Secondary Voltage ….

Figure 1. The turns ratio determines whether a transformer is a step-up or step-down transformer . Note. Most motor control circuits are powered from step-down transformers that reduce the voltage to the control circuit. A step-down transformer reduces the voltage to the control circuit to a level of 24 V or 12 V, as needed.Applications. 3-Phase Step-Up Transformers are essential for a broad array of applications, some of which include: We run a state-of-the-art facility that can handle virtually any volume requirement. Constructed from 100% copper, our transformers are available in a range of power from 1VA to 75KVA. With ISO 9001:2008 and AS9100 certifications ...#1 I just picked up a sweet LeBLOND Regal lathe that came with what looks like the original 3/4 HP 3-phase 480/830v motor, but my home garage/workshop has 240 …Aug 8, 2008 · IMHO the _right_ transformer for the job would be a 240V delta to 480/277V step up transformer, with the secondary grounded at the neutral point. Such a transformer will have taps on the 240V side so that you can adjust for incoming voltage, will have a neutral point to ground on the secondary side, and will be designed to minimize 'inrush ... Both have VFDs driving their spindles. The electrician is proposing reverse feeding a 480 delta x 240 delta stepdown transformer. I asked him about corner grounding and he no, so he's proposing running it as an ungrounded delta system. This sounds kind of dangerous, since in the event of a ground fault it becomes an ad-hoc corner grounded ...5 KVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, General Purpose Transformer, Sand and Resin Encapsulated, 115 Degree C, Aluminum Windings, 60 Hz operation (50/60 Hz optional), Frame Size: FR177. ***Reverse Feed Capable and for use with 3-Phase Source by connecting primary to any two wires of a 3-Phase System***. View ... IMHO the _right_ transformer for the job would be a 240V delta to 480/277V step up transformer, with the secondary grounded at the neutral point. Such a …E. 240/480 Volt Primary Single Phase Isolation Transformers. TEMCo Single Phase Isolation Transformers are 50/60 Hz rated and come in a NEMA 3R enclosure for indoor use as well as outdoor protection against rain and sleet. Our transformers are built to last, guaranteed. That's why we back these with a decade long warranty. • UL Listed, CSA ... Step up transformer 240 to 480, Looking for SQUARE D, 240V AC/480V AC, Single Phase Transformer? Find it at Grainger.com®. With over one million products and 24/7 customer service we have …, In reality, transformers have differing number of coil turns to utilize taps. A 480 VAC primary essentially has twice as many turns as a 240 VAC primary. Taps need to be on the front face of the primary coil; The primary coil is always the outer coil; In a 240 VAC to 480 VAC step-up transformer, the primary coil is the 240 VAC coil, Jul 2, 2011 · VFDs do not as a rule step up the voltage either. So you would have to get a transformer to step up your 240V to 480V single phase. Then you would need to use 480V VFDs that are capable of 1 phase input. Technically all are, but some do not allow it, because they have built-in phase loss protection that cannot be defeated. , have 240 volts and the output would be 480 volts. Standard transformers rated 3 KVA and larger can be used for either step-up or step-down service. Transformers rated 2 KVA and below have compensated windings and should not be used in reverse feed applications. Autotransformers Standard transformers are referred to as insulating transformers ..., Wilson Power Solutions stopped manufacturing Tier 1 transformers but we hold stock of Wilson e1 distribution transformers, available on a 10 week lead time with some units available ex-works. All stock transformers come with the following base specification: HV off load tap changer with additional tap setting (+/-2.5%, +/-5.0%, +7.5%),, Transformers 15kVA and higher that meet DOE 2016 legislation will help lower operating costs, lower cost of ownership, increase profitability, and reduce overall greenhouse gas emissions. In addition to energy efficient transformers and general application three phase transformers, you can choose from the following additional types of transformers: , Description: We offer a complete line of control transformers for machine tools, electromagnetic devices, and industrial applications, which include multi-tap, step-up, step-down, open core, and encapsulation. Our control transformers are constructed with high-quality silicon steel lamination . Maximum Primary Voltage Rating: 100 to 600 volts; …, Step-Up Transformers. If there are fewer turns in the primary winding than in the secondary winding, ... Problem: An industrial plant requests a transformer that can step down 480 volt three-phase to 240 volt three-phase and supply 200 kVA of load at 240 volt three-phase and 5 kVA of load at 120 volt single-phase., Step-Up Transformers. If there are fewer turns in the primary winding than in the secondary winding, ... Problem: An industrial plant requests a transformer that can step down 480 volt three-phase to 240 volt three-phase and supply 200 kVA of load at 240 volt three-phase and 5 kVA of load at 120 volt single-phase., So here is my project. I need 480 V three phase for a plasma cutter... Incoming power is 240 single phase. I have a three phase step up transformer (45 KVA 240V/480V) and a 10 HP 460 V three phase motor for the rotary part... Any issues running single phase 240 through the transformer to get single phase 480 V (not using one leg of the ..., 150°C Rise - Primary 600 V or 480 V Three Phase, Seconday 208 Y / 120 V Single Phase, Secondary 120 / 240 V * Primary Voltage – F = 480V, G = 600V. See page 7-3 for Catalogue Code Detail. T1*10015C5RXXM 15. W/F 4 X 2.5 2 24 600 22 561 18 457 165 75 WD1 T1*10025C5RXXM 25. W/F 4 X 2.5 3 26 650 25 632 19 483 240 109 WD1 …, The formula for both three-phase and single phase transformers is given below. 3 phase transformer current is equal to: I3ph = P3ph / (√3 × V3ph) Where: I3ph [kA] = the current flowing through the windings. P3ph [kVA] = the rated 3 phase power of the transformer. V3ph [kV] = the 3 phase voltage at the windings., Oct 6, 2023 · Sizing a step-up transformer involves considering the desired output voltage, input voltage, and power requirements. You can estimate the size based on the ratio of input to output voltage and the load power in kVA (kilovolt-amperes). For example, if you need to step up 480V to 208V with a load of 100 kVA, you’d need a transformer with a kVA ... , 39 Products About AC to AC Voltage Transformers For single -phase equipment, use this formula to find power output: VA = Volts × Amps For three -phase equipment, use this formula to find power output: VA = Volts × Amps × 1.73 More Enclosed Step-Up/Step-Down AC to AC Transformers, A 1 Phase Step-up Transformer is an electrical device designed to convert a 3 phase 480V voltage into a single phase, 240V output. It works by transforming the three phases of energy into a single phase, allowing for the use of standard 120V household appliances on higher voltages such as 480V. This can be incredibly useful when it comes to ..., Siemens MT0200A Industrial Power Transformer, Domestic, 240 X 480, 230 X 460, 220 X 440 Primary Volts 50/60Hz, 120/115/110 Secondary Volts, 200VA Rating , Black. 3. $12996. FREE delivery Fri, Sep 29. Or fastest delivery Tue, Sep 26. Only 15 left in stock (more on the way). , Transformer Size Calculator. When sizing a transformer, you need to know the kilovolt-amps (KVA) that your machine requires. This tool will allow you calculate the KVA that you need. This tool only evaluates common voltages for North America (ie. 24v, 120v, 208v, 240v, 480v, and 600v). If you have a Eurpoean voltage or something else that is ... , Seven Star ST-3000 Watt 110/-220 Volt Step Up Down Transformer Converter 300W. $24.95. $24.25 shipping. 2 watching., If you are using a 480V/240V transformer, you will need to apply 480V on the primary side. To do so, you should connect any two of the phases of the 3-phase supply as you have seen in Figure 1. In this case, you can use both delta or star connected 3 phase supply. If you are using a 277V/240V transformer, you will need to apply 277V to the ..., 240 X 480-120/240 Volt 1 Phase Transformers. $ 528.00 – $ 2,994.00. • Energy Test Efficient Single Phase Transformer. • UL & CUL Listed / CSA Approved. • Conduit knockouts for easy installation. • Vibration Dampening System. • Rugged Enclosures. • UL Listed 130 (3-9kVA) & 220 (15-75kVA) Degree C Insulation System., Voltage change is just a winding ratio, so the ratio from 120 to 240 is 2:1, the same as 240 to 480V. The problem is, voltage DESIGN is based on things like creepage distances and air separation, plus electrical dielectric properties of the insulation used. A cheap 240-120V transformer most likely will not be made with the proper clearances you ..., Jan 1, 2016 · 240 x 480 winding can be connected for either 240 (parallel) or 480 (series). A 120/240 winding can be connected for either 120 (parallel) or 240 (series), or 240 with a 120 mid-point. Design Guide DG009001EN Effective February 2020 19 .1-3 Dry-Type Distribution Transformers General Purpose General Purpose Ventilated Transformers EATON www ... , Buy frequency converters to change 110v/120v 60Hz to 208v/220V/230V/240V 50Hz by built-in transformer, up to 400Hz, convert fixed Hertz to variable Hz power supply. Call us (Toll-free): +1 800-603-1219 ... New Zealand, Malaysia etc.), converting three phase 220V 60 Hz to 380V/400V/440V/480V 50 Hz in one step by built-in step up transformer for ..., have 240 volts and the output would be 480 volts. Standard transformers rated 3 KVA and larger can be used for either step-up or step-down service. Transformers rated 2 KVA and below have compensated windings and should not be used in reverse feed applications. Autotransformers Standard transformers are referred to as insulating transformers ..., SKU: ATO-T-SG30KVA. Quick View. $6,492.06. SKU: ATO-T-SG50KVA. Quick View. Add to cart. 40 kVA isolation transformer is designed to step down 3 phase voltage 480V to 240V or step up 240V to 480V, aluminium/copper winding material, and widely used in various power supply sites with frequency 50Hz or 60Hz., 240 X 480-120/240 Volt 1 Phase Transformers. $ 528.00 – $ 2,994.00. • Energy Test Efficient Single Phase Transformer. • UL & CUL Listed / CSA Approved. • Conduit knockouts for easy installation. • Vibration Dampening System. • Rugged Enclosures. • UL Listed 130 (3-9kVA) & 220 (15-75kVA) Degree C Insulation System., Siemens MT0200A Industrial Power Transformer, Domestic, 240 X 480, 230 X 460, 220 X 440 Primary Volts 50/60Hz, 120/115/110 Secondary Volts, 200VA Rating , Black. 3. $12996. FREE delivery Thu, Oct 12. Only 18 left in stock (more on the way). , You may require a 240 to 480 step-up transformer because you are working with equipment needing 480 volts in three-phase power. Most household appliances operate on 120 volts. This kind of transformer is a step-up transformer. The power across transformers remains at a constant value., Siemens MT0200A Industrial Power Transformer, Domestic, 240 X 480, 230 X 460, 220 X 440 Primary Volts 50/60Hz, 120/115/110 Secondary Volts, 200VA Rating , Black. 3. $12996. FREE delivery Fri, Sep 29. Or fastest delivery Tue, Sep 26. Only 15 left in stock (more on the way). , I don't seem to have much trouble finding a 75kva 480 to 240/120 transformer. ... In order to re-feed the existing panels in the building we have installed the 75kva step down transformer ... the same. Like on my passports, it says to run at 7.1 v (on dial) and 80 on wire speed. Well you will need to click it up 1 to 7.2 (only 3 ..., This transformer is designed to convert 3-phase 240v to 3-phase 480 Y 277 to run equipment such as panels, motors, CNC machines, welders, conveyor systems, pumps, printing equipment, fabrication tools, and other business machines. Not sure what to buy? Find out more about how to buy the right transformer. Primary Voltage: 240 Delta , do i go up 2 sizes as a rule of thumb . #2-do i size single phase transformer to the size of the 50 hp motor (65 amps x 1.73 =112.45 amps ) 240 x 112.45/1000 =27.12 kva transformer or to the hp rating of the vfd.(i think i size to the vfd rated hp)thats 2 sizes bigger .#3-if i fuse transformer at 125% on primary side would i have to install ocp …, 112.5 kVA 230 Volt to 380Y/220 Volt Three phase Isolation Transformer ... NOT in stock. Current lead time to manufacture: 7-8 weeks. Add to Cart. US$ 15,186.00. Catalog No.: BC112C1-R/Z3. Isolation Transformer 112.5 kVA • Three Phase • Primary: 230 Volt • Secondary: 380Y/220 Volt. Conductor: Copper.