Section 250.20 (A) provides the requirements for grounding systems of less than 50V. The Code requires alternating current (AC) systems of less than 50V to be grounded under any of the following conditions: Where supplied by transformers if the supply system exceeds 150V to ground. Where supplied by transformers if the supply system is ungrounded.Need some help.....I have a 3 phase 480V Delta Primary to 208V WYE Secondary dry transformer.....however it was hooked up in reverse.....whereas the Incoming Power is 208V and the Outgoing is 480V.....It feeds a 3 phase 4 wire 480 Volt Panelboard.....they installed a neutral wire from the XO terminal, thru a lug on the frame (stripped the insulation in the lug) and terminated it in the 600V ...Primary volts: 120x240, 208x416, 120/208/240/277, 240x480, 277, 277/480, 347/380, 600; CSA and UL Listed; Electrostatic shield standard on all three phase units and single phase units from 750VA and up; What is an encapsulated transformer? Basically it just means that one or more of the transformers components are completely sealed.The 2 standard sizes I've used are 45 and 75 KVA. The 480 side of the 45 will be 54 amps, the 120/208 will be 125 amps. On the 75, it's 90 on the 480 side and 208 on the 120/208 side. You'll need to pick one based on the load. It's very common to see a 100 amp breaker in a 480 panel feeding a 75 KVA transformer and a 225 amp main in the 120/208 ...Tutorial for wiring 480/240V Primary for 240/120V Secondary on Epoxy Resin Encapsulated Low Voltage General Purpose Transformers. Learn more at Schneider El...25 ES12H25S WS-15 28 (711) 16 (406) 16 (406) 250 (113) 1 2 90.3 208/104 Energy efficient dry-type SolaHD General Purpose Transformers 600 Volt Class, isolation type, single and three phase, 15 kVA through 500 kVA. Indoor and outdoor models available. For catalog numbers outside of the standard Selection Tables, fill out the Custom Transformer ...So this transformer wiring was sized to what the machine was rated . If you are installing a 112.k kva 480v to 120-208v transformer for panel boards I believe that primary wire size would need to be 1/0 per code . This transformer now has #1 primary and two #1/0 secondary per phase .So, it sounds like there are two common wiring methods for 75KVA (480V/Y208V) transformers as far as the OCPD sizing. 1) Primary OCPD - 90A Secondary OCPD - 200A 2) Primary OCPD - 125A Secondary OCPD - 300A. If inrush current was not a factor, what factors make one choose between...May 11, 2018 · Transformer wiring diagrams are printed on the . ings are shown connected to form a V delta to /V wye, 3-phase, step-down transformer bank. For volt primary to volt secondary, degree temperature rise units the dimensional information, shipping weight, lbs, wiring diagram number. Please See Last Page For Supporting Doentation This Product Certificates Cad Files Drawings Ies Wiring Dia. Power Distribution Configurations With Three 3ph Lines. Dayton Class 2 Transformer 480v Ac 208v 120v 240v 24v 75 Va Foot Wire Leads 4vzf5 Grainger5 Kva Transformer Primary 240 X 480 Secondary 120 Federal Pacific Se2n5fs. Square D Control Transformer 208v Ac 120v Foot Top Mounted Fuse Block 1 1yuw8 9070tf150d3 Grainger. Control Transformers Power Voltage Stepdown Converters. Square D Schneider Electric 9070tf300d31 Control Transformer Standard Supply CoAccording to my limited experience, 40000w/460v = 87 Amps is what I need on the secondary side. In order to know the primary current, if I understand correctly, due to the inrush current, it is based on the capacity of the transformer not the actual draw, ie: 75 KVA/ (208*1.732) = 208A.Low voltage transformer, non ventilated dry type, 3 phase, 150kVA, 480V primary, 208Y/120V secondary, Type 3R.Schneider Electric USA. EE225T3H - Transformer, dry type, 225kVA, 3 phase, 480V delta primary, 208Y/120V secondary, 24D, 150C rise.This transformer is designed to convert 3-phase 208v 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. 480V To 208V Transformer Wiring Diagram / High Leg Delta Wiring 240v 208v 120v 1 3 Phase Panel /. See page 7 for connection diagram. Issue:single phase transformer primary and secondary. Is it …1.363636. 0.788229. You can alternatively use kVA to Amps calculator for Conversions. 45 kVA transformer amps can be calculate using kVA to Amps conversion Formulas: List of Contents 45 kVA Single Phase Transformer Amps when V = 1.1 kV Amps = 45 * 1000 / 1100 = 40.9 Amps In case of Three-phase 45 kVA Transformer Amps = 45 * 1000 / …Web i have a 480 to 208 transformer that i am wiring in for a new machine, it is replacing a 480/400 transformer. Web april 5, 2023 the 480 to 208 transformer wiring diagram, pointers, and often asked questions are all available here.Wiring diagram on inside front cover. ... Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section. Group C: 480 Volt …Jan 6, 2020 · Question: What size secondary conductor can be used for a 45kVA continuously loaded, 3-phase, 480V-120/208V transformer? Step 1: Determine the secondary current rating. Secondary Current = Transformer VA ÷ (Secondary Voltage × 1.732) I = 45,000VA ÷ (208V × 1.732) I = 125A 25 ES12H25S WS-15 28 (711) 16 (406) 16 (406) 250 (113) 1 2 90.3 208/104 Energy efficient dry-type SolaHD General Purpose Transformers 600 Volt Class, isolation type, single and three phase, 15 kVA through 500 kVA. Indoor and outdoor models available. For catalog numbers outside of the standard Selection Tables, fill out the Custom Transformer ...14 Agu 2019 ... A 480 to 208 is a 2.3 ratio. For a 45 KVA transformer the size of the primary side overcurrent device is permitted to be 70 amperes. The ...480 — 24/48 volts. 2. ... Transformer Incoming Power (Supply) Wires To Load Wiring trough or box (not supplied with the transformer(s). Available from electrical supply …The delta–wye connection is the most commonly used three-phase transformer connection. The wye-connected secondary allows single-phase load to be distributed among the three phases to neutral instead of being placed all on one winding as with a four-wire delta secondary.14 Agu 2019 ... A 480 to 208 is a 2.3 ratio. For a 45 KVA transformer the size of the primary side overcurrent device is permitted to be 70 amperes. The ...480v To 208v Transformer Wiring Diagram Three Phase - Connection Diagrams. . *Transformers 15 kVA through kVA are equipped with a volt lighting tap. Lighting tap 6. 2. Sh*. 6. 6. volt Delta primary. /V …As it sits connected, faults on the 480V side have no way to get back to the (H0) 480V winding of the transformer, to open the overcurrent device. Then, after a fault, in essence your system becomes a corner grounded system. Before a fault, your 480V side is ungrounded, never a good arrangement, for a standard shop. SAF ΩM. micromind · #4 · Jan 26, 2018. 150 KVA @ 480 3Ø = 180 amps. You can feed it with a 200 but if it's loaded to the gills, it'll push the 200 a bit. 150 KVA @ 120/208 3Ø = 416 amps. This would obviously overload a 400 amp panel. If the 400 amp panel is loaded to the full 400 amps, you'll see roughly 172 amps at the 200 amp breaker.Apr 12, 2019 · Blue prints requires a 100 amp 3 phase 120/208 panel. Blueprint has no detail to feeder size and wire sizes. i know i can feed a 45 kva with 480 3 phase and a 70 amp breaker and get 125 amps secondary. So the secondary panel has a 100 amp main breaker . I fed a 45 kva transformer with #6 thwn... Nov 20, 2015 · You mentioned "steps" The basic steps are fairly straightforward (a) calculate your load (b) select the transformer (c) check Art 450 to assure correct transformer protection {450.3 in particular} and (d) check Art 240 to aid in sizing overcurrent protection and conductor sizing {240.21(c) in particular for transformer secondaries). 480 Delta 208Y/120 41.6 A / n/a 15 1.8-6 420 200 [90.72] SG3A0030KB SG3A0045KB SG3A0075KB SG3C0015KD ... Distribution Transformers Wiring Diagrams SCD19 SCD21 Schematic Connections ... 208 X1, X2, X3 120 X1, X0 X2, X0 X3, X0 Schematic Connections14 Agu 2019 ... A 480 to 208 is a 2.3 ratio. For a 45 KVA transformer the size of the primary side overcurrent device is permitted to be 70 amperes. The ...225A, 480Y/277V panel that feeds a 45kva 480V:208Y/120V transformer that feeds a 125A, 208Y/120V panel ... connecting either a single phase 2 wire transformer or if you are connecting a 3 phase delta-delta transformer with a 3 wire secondary. But for a 3-phase 480V:208V system 450.3 should be followed. augie47 Moderator. Staff member.I need to hook up a single phase 480v to 208v transformer. Need to get help sizing primary and secondary OCPD and - Answered by a verified Electrician ... I have a 30 Kva 240 to480 step up transformer that needs to feed one 3 phase 480v 30 amp motor. what size wire would I need for my primary and secondary ...421-7245-000 100 KVA JEFFERSON TRANSFORMER - Stock No. 11-4375, 1 Phase, 240x480 Primary Voltage, 120/240 Secondary Voltage, 2+4- Taps, STANDARD Impedance Pct. T1970H100S-RP 100 KVA EGS TRANSFORMER - Stock No. 11-5119, 3 Phase, 380/480 Primary Voltage, 208/120 Secondary Voltage, 3+ Taps, 5.5 Impedance Pct.Note that a grounded neutral conductor cannot be derived from a reverse-fed transformer because standard transformers are not usually manufactured with a four-wire primary side. Therefore, if the 480V side is grounded, one of its phase conductors must be connected to an earth-grounded electrode so that the transformer has a grounded conductor ...The wye-delta transformer shown in Figure 9 is sometimes used to provide a neutral on a three-wire ... Single phase CPTs in "Open Delta/Open Delta" formation with one of the CPTs having a center-tap to derive 240/120/208V on secondary? ... I have three phase service ,240 high leg and I need 480 , I have three phase transformer it is a ...421-7245-000 100 KVA JEFFERSON TRANSFORMER - Stock No. 11-4375, 1 Phase, 240x480 Primary Voltage, 120/240 Secondary Voltage, 2+4- Taps, STANDARD Impedance Pct. T1970H100S-RP 100 KVA EGS TRANSFORMER - Stock No. 11-5119, 3 Phase, 380/480 Primary Voltage, 208/120 Secondary Voltage, 3+ Taps, 5.5 Impedance Pct.Wiring Diagram For A 480/277v 3 Phase To 208/120v Transformer read transformer winding diagrams and connect a transformer for the desired primary properly ground a transformer, and the secondary electrical system . v. = A. Secondary full-load current. 2 kVA X 1 V. = A .. ings are shown connected to form a V delta to /V wye, 3-phase.Wiring diagram on inside front cover. ... Design Styles and Electrical Connections can be found at the end of the Ventilated Distribution Transformers section. Group C: 480 Volt …480 Delta 208Y/120 41.6 A / n/a 15 1.8-6 420 200 [90.72] SG3A0030KB SG3A0045KB SG3A0075KB SG3C0015KD ... Distribution Transformers Wiring Diagrams SCD19 SCD21 Schematic Connections ... 208 X1, X2, X3 120 X1, X0 X2, X0 X3, X0 Schematic ConnectionsThe utility provides the site with a 480V single phase service. The Owner has an existing 480V transformer that gets the voltage down to 120V. This xfmr is being relocated, specs on it are: 15kVA, 60Hz, single phase, Primary Volts 432/456/480, Secondary Volts 120/240. See attached photo which includes a wiring diagram - not sure what to make of it.Wiring Devices. 15 & 20 Amp Straight Blade Configurations ... 2-Wheel 240/480V to 120/240V Single Phase- Encapsuated Transformer; 2-Wheel 480V-120/208V 3-Phase Power ...So, it sounds like there are two common wiring methods for 75KVA (480V/Y208V) transformers as far as the OCPD sizing. 1) Primary OCPD - 90A Secondary OCPD - 200A 2) Primary OCPD - 125A Secondary OCPD - 300A. If inrush current was not a factor, what factors make one choose between...Buck-Boost Transformer Installation Sheet ... 2011 by T.E. If you are using this unit as an isolation transformer with a primary of 120 or 240 or 480 volts and the secondary of 12/24, 16/32, or 24/48 (depending on the model) use the wiring diagram located on the inside of the cover to the wiring compartment. If you are using this unit as an auto transformer to …Nov 8, 2020 · A 480v to 120 208v transformer wiring diagram can save you time, money, and energy. Knowing the exact location of each wire, how to connect each one to the other, and what type of connection to use makes all the difference. With this diagram, you can avoid costly installation mistakes and install the transformer correctly the first time. Wiring a Transformer backwards. I have120/208 at my Jobsite. I need 277/480 to supply a temp material hoist. My shop has a step down 480 primary to 208 secondary transformer. They want me to use this transformer and wire it reversed. My primary being my load for my hoist and my secondary being my line from my mdp.Note that a grounded neutral conductor cannot be derived from a reverse-fed transformer because standard transformers are not usually manufactured with a four-wire primary side. Therefore, if the 480V side is grounded, one of its phase conductors must be connected to an earth-grounded electrode so that the transformer has a grounded conductor ...The most routinely encountered transformer installation is likely the common three-phase 480/277 volts (V) to 208/120 V wye dry-type transformer supplying a panelboard. Many field electricians, design professionals, and inspectors struggle with these installation requirements.A wiring diagram will certainly show you where the cables must be connected, so you do not have to guess. You don't have to think, a wiring diagram will reveal you exactly how to connect the cables. See the 480V To 208V Transformer Wiring Diagram images below. 480V To 208V Transformer Wiring Diagram, 480v To 208v 3 Phase Transformer Wiring ...Jan 1, 2016 · The transformer core volume allows for efficient transformer operation at 10% above the nominal tap voltage. The core terminated in the wiring compartment. laminations are tightly clamped and compressed. Coils are wound of electrical grade aluminum or copper, and are of continuous wound construction. The BIL (basic impulse level) for all 600 V ... acme electric † milwaukee, wi † 800.334.5214 † acmepowerdist.com 155 general electrical connection diagramsacme® transformer™ wiring diagrams primary: 240 x 480 secondary: 120/240 taps: none x4x1 h4 h3h2 h1 x2 x3 primary: 240 x 480 secondary: 120/240 12, 2 /2% anfc, 4, 2 1/2% bnfc x4 x1 h10 h2 h3 h130 KVA, 3-Phase, 480 Delta Primary Volts - 208Y/120 Secondary Volts, NEMA 1, Energy Efficient, Energy Star labeled Transformer, Ventilated, 150 Degree C, Aluminum Windings, 60 Hz operation, Frame Size: FR940. For Outdoor use Weather Shield WS58. DOE 2016 Efficient. ***Reverse Feed Capable***, Cat #: V48M28T3016, Mfr: EatonGet it by Fri, Oct 27 - Fri, Nov 3. Compare. Control Power Transformer, 50VA, 240/480V Primary, 24V Secondary. Shop 480 VAC to 24 VAC transformers from top brands such as Johnson Controls, Square D, Packard, and more. Order online today with fast shipping and easy returns.28 Sep 2021 ... Thank you for that information. You will need a 30 amp breaker for the 480 volt primary and a 60 amp breaker for the 240 volt secondary.30 amp ...How to Hook Up a 480V, 208V, or 120V Transformer. Transformers serve as voltage step-up or step-down devices where the voltage applied to the input of the transformer is increased or …The press is set up for 480v 4 wire my building has 480 3 wire. I dont have the room to change the heaters over to 240, that would requaire double the relays and fuse(no room in the panel boxes for that. ... Larry, and Winnie pretty well have it. 225KVA, 480D to 480Y transformer to feed the 277 loads. The feed from the transformer will be 3ph ...The formula is straightforward. We just need the load's current and voltage requirements (it's indicated in the device's label). Then we multiply them and later divide the result by 1000 to express it in kVA. The formula for a single-phase transformer is: \quad \text {kVA}= \frac {I \cdot V} {1000} kVA = 1000I ⋅ V.The transformer isn't exactly limited to 208 amps, that is what current will be when 75kVA is being supplied. It can and will deliver more than that, but at cost of more heating in the transformer. Short term overloading may be deemed acceptable in some cases, continuous overloading generally is not without at least dealing with ways to manage ...An Overview of Step Down Transformer 480v To 120v Wiring DiagramsStep down transformers are a type of electrical device that can convert high voltage electricity into lower voltage electricity. They are commonly found in industrial and commercial applications where the input voltage is too high for the equipment or machinery to safely use ...May 17, 2011. #3. grumpy11 said: i have to give a customer a full 400amps at 208 volts 3 phase 4 wire. the design is to install a 150kva step down transformer. now since a 150kva tx. on the primary is 180amps i intend on running 3#3/0 fused at 180 amps. off the secondary side i believe {using 90degree wire }i should use 750 mcm.In above all, the load is another important factor for choosing the transformer cable. For Transformer, we should choose two types of cable such as the primary side and secondary side. The rating of the cable should be 150% of the full load current. i.e if your transformer’s primary current is 450 Amps means, you should choose 450 *150% = 675 ...The transformer will not function properly and could be dangerous. When wiring a 480-volt to 120-volt transformer, you will need two wires of the same size and type. You should first connect the two transformers together and make sure they are firmly secured before wiring each one separately.Schneider Electric USA. EE45T3H - Transformer, dry type, 45kVA, 3 phase, 480V delta primary, 208Y/120V secondary, 18D, 150C rise.The job is a remediation trailer that has a few motors that operate at 240 3p and one or 2 120v circuits, my goal is to install a feed from the main panel 480v to a 100 amp disconnect I will install next to the transformer, then have a 100 amp panel on the secondary of the transformer the will subsequently feed the trailer panel (80)amps.If you use the wrong gauge wire, you will not be able to make a proper connection. The transformer will not function properly and could be dangerous. When wiring a 480-volt to 120-volt transformer, you will need two wires of the same size and type. You should first connect the two transformers together and make sure they are firmly secured ...Select a transformer that will operate on the supply voltage available at your facility (Example: 120V, 240V, or 480V). To ensure compatibility, check the wiring diagram by clicking a part number and viewing its product page. Frequency. All the transformers in this section are rated for both 50 and 60 Hz, for use worldwide. WindingsI have a new nail salon, which is fed with a 277/480 system with a transformer to 120/208 # XXXXX 4 wire, I am having a problem with 12 gfi outlets, seperate circuits, they will set and trip with the … read moreIf you are using a transformer that comes from the factory with a 480 V delta primary and a 120/208 V Y secondary, backwards, ... but the load must be 3 phase 3 wire, no neutral. ... 480 delta 240 delta transformer trips ground I am using a 480v delta to 240v delta backwards to get 480v for a motor from a 120/208 highleg panel. From the panel I ...They dropped off the transformer two days ago and it is 480v to 208y/120. He basically brushed it off as not a big deal, and said he wasn't sure he could get one in 240v with a neutral tap. I don't seem to have much trouble finding a 75kva 480 to 240/120 transformer. ... This is assuming the transformer is a 4 wire out, 3 phases of 208 and a …25 kVA, 1-Phase, 240 x 480 Primary Volts - 120/240 Secondary Volts, NEMA 3R, Shielded Isolation Transformer, Encapsulated, 60 Hz. HxWxD: 18.44" x 16.13" x 13.34". ***Reverse Feed Capable and for Use with 3-Phase Source by Connecting Primary to Any Two Wires of a 3-Phase System***D. 480 Volt Primary Three Phase Isolation Transformers. TEMCo Three 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 Approved.This is an example of a 3-phase dry-type transformer installation.Buy online: https://www.maddoxtransformer.com/products/This video is for …Looking for SQUARE D, 120V AC/208V AC Wye, Three Phase Transformer? Find it at Grainger.com®. With over one million products and 24/7 customer service we have supplies and solutions for every industry. ... Transformer 480V AC Delta. Output Voltage - Transformer 120V AC; 208V AC Wye. VA Rating - Transformer 6 kVA. Mounting - Transformer Wall.Three-phase Transformers are the backbone of electrical power distribution whether Delta or Star connected windings. A three-phase electrical system in used to generate and transmit electric power over long distances for use by offices and industry. Three-phase voltages (and currents) are raised or lowered by means of three phase transformers ...25 ES12H25S WS-15 28 (711) 16 (406) 16 (406) 250 (113) 1 2 90.3 208/104 Energy efficient dry-type SolaHD General Purpose Transformers 600 Volt Class, isolation type, single and three phase, 15 kVA through 500 kVA. Indoor and outdoor models available. For catalog numbers outside of the standard Selection Tables, fill out the Custom Transformer ... See the 480 To 208 Transformer Wiring Diagram images below. 480 To 208 Transformer Wiring Diagram, 480v To 208v 3 Phase Transformer Wiring Diagram – Style Guru: Fashion 480 To 208 Transformer Wiring Diagram, 480v To 208v Transformer Wiring Diagram Tips and tricks for reading wiring diagrams. When taking a look at a …Or do 208V delta to 480V wye (and just not connect the neutral since it is not needed for a motor load). Click to expand... If you haven't purchased the transformer get a 208 delta to 480 delta.All interconnecting wiring is performed ... there is a 480 V or 600 V distribution system and loads requiring 208Y/120 V, ... Plug-In Mini-Power Center (Aluminum-Wound Transformer and Loadcenter Chassis Standard) Catalog Number Information—NEMA Type 3R kVA Catalog Number Full Capacity de28 Sep 2021 ... Thank you for that information. You will need a 30 amp breaker for the 480 volt primary and a 60 amp breaker for the 240 volt secondary.30 amp ...This concerns delta corner grounding I have a 480 - 120/208 transformer. I want to derive 480 volts. I will feed a 30 kva with a 90 amp breaker and feed the L 123 lugs I then will take H 123 for my load. My question is do I corner ground one of the 3 H legs to produce stable voltage readings?I made a mistake in my original post, the transformer was indeed 480/208, not 480/240. There are a total of three- one 480/208 delta/wye and two 480/240 delta/delta --- I got them mixed up while typing. This is how we ended up wiring the transformer, with the line from the panel coming in on the right, and the load out the ECB on the left.Low voltage Dry-type. Maddox Industrial Transformer provides a full range of commercial- and industrial-grade transformers. With thousands of new and reconditioned units in stock, our transformers are ready to ship at a moment's notice. And if we don't have what you need in stock, we can manufacture it for you with the shortest lead-times in ...SolaHD HS14F15BS, HS14F1.5BS 1.5KVA 208/240/415/480V Primary 120/240V Secondary 60Hz Copper Wound Encapsulated Single Phase Automation Transformer. Height 12 in, Width 10 in, Depth 7 in Weight 40 lbsVoltage between High leg and Neutral = 1/2 x 220V x √3 = 208V (1-Φ). Voltage between two Hot Phases = 120V x 2 = 240V (1-Φ). Voltage between three Phases = 240V (3-Φ). These are the general setup and may vary and depend on the installation e.g. neutral wire may be needed for three phase 240V outlets etc.a 480 to 208 transformer does not care if the supply system is derived via wye or delta, ... Just to provide another look from a different angle, think about what would happen if you connect a 1:1 wired 120V transformer to L1, N, and L2 of a single phase service. If the voltages from POCO are balanced, no problem.The turns ratio of a 480/208/120 volt 3 phase transformer is A. 2/1 B. 2.3/1 C ... if it was written 480/240 x 120 then i would think that it was a duel input voltage transformer that would transform either 480 or 240 and keep the secondary at 120 respecivly ... Come join the discussion about trade knowledge, tools, certifications, wiring ...If you are using this unit as an isolation transformer with a primary of 120 or 2, The advantages of using a buck-boost transformer over an equivalen, Apr 25, 2017 · I have a 60 amp 3 phase 480 volt equipment. I have 3 phase 208 , 208V AC. 220V AC. 225V AC. 230V AC. 240V AC. 245V AC. , Need some help.....I have a 3 phase 480V Delta Primary to 208V WYE Secondary dry transformer.....however it was hook, Your 480v hot connects to H1. Your 480v white connects to H4. I'm not 100% on this par, Transformer Size Calculator. When sizing a transformer, you need to know the kilovolt-amps (KVA) that your machine requ, Junior plan reviewer. Jan 13, 2021. #1. Please see attached , Schemes of 3-phase transformers, source of 120, 208, 230 a, 60kVA/kW input isolation transformer provides 480V (Delta) to 208V (, Dec 20, 2010 · Grounding electrode and grounding elec, Primary: 240 x 480, 230 x 460, 220 x 440 with Jumpers Secondary, Resources. How to Hook Up a 480V, 208V, or 120V Transformer. Trans, 6 Jan 2017 ... Reputable manufacturers will use good joints, at s, 60kVA/kW input isolation transformer provides 480V (Delt, -More Things About Me-https://linktr.ee/DailyElectrician-, Control Transformers Power Voltage Stepdown Converters., Quick Overview. Catalog No.: RC45H-B. Autotransfor.