75 kVA dry type transformer, 480 to 208Y/120

What a 75 kVA 480 to 208Y/120 transformer carries

This is the standard building transformer. It takes the 480 volt three phase feeder and makes 208Y/120 for lighting, receptacles and small equipment panels. At full load it carries 90.2 A at 480 V and 208.2 A at 208 V.

The table shows the full load current of a 75 kVA unit at every common voltage, computed from kVA times 1000 divided by the voltage times 1.732.

Computed. Use the kVA to amps calculator for any other rating.

Public prices, November 2026

These are asking prices from distributor and surplus listings read in November 2026. They are not our prices. The spread is wide because enclosure, winding metal and stock position all change the number, and a distributor list price can be twice its sale price, as the Sola Hevi-Duty listing below shows.

Asking prices from the sources listed below. Freight, taxes and installation are extra.

Lead times

Stock is the fast route. Maddox says its in stock dry type units ship in 3 to 5 business days, and Phoenix Phase Converters gives the same 3 to 5 days on its stock isolation units. A factory order is far slower. Terrapin Construction Group lists dry type transformers up to 2 MVA, 480 to 208 V, at 20 to 32 weeks in 2026. ELSCO says a complex build to order dry type can take 50 weeks to well over a year, and offers its own modified stock units in 10 to 12 weeks.

For a 75 kVA unit at a standard voltage, ask for stock first. A special voltage, copper windings or a low temperature rise is what pushes an order onto the factory schedule.

Sizes, weights and specs

In the listings below a 75 kVA dry type is a floor mounted box 34 to 43 inches tall and 28 to 30.5 inches wide, weighing 505 to 570 lb. These are the published figures.

From the maker and seller pages listed below. Check the submittal drawing before you set a pad or a wall bracket.

NEMA 1 or NEMA 3R, aluminum or copper

A ventilated NEMA 1 unit is for indoor electrical rooms. Outdoors it needs a NEMA 3R enclosure or a weather shield kit, as on the Sola Hevi-Duty and Acme 3R units above. Most stock units are aluminum wound. Copper wound units such as the Square D EXN75T3HCU cost more, which is why that listing sits at the top of the price table. Our NEMA enclosure chart explains each rating.

Catalog numbers you will see

All of these are 75 kVA, three phase, 480 V primary and 208Y/120 V secondary, taken from the listings cited on this page. Send us any of them and we quote the same rating from stock, new or reconditioned.

• Eaton V48M28T75 and V48M28T7516, 480 delta to 208Y/120, ventilated
• Square D EE75T3H and 75T3H, and the copper EXN75T3HCU
• Sola Hevi-Duty EE2H75S, NEMA 3R, and the older Hevi-Duty T2H75
• Acme T3075K0013B and T3075K0013BSF
• Cutler-Hammer N43M28T75A on older surplus units
• Federal Pacific T48LH2Y-75, NEMA 3R

DOE efficiency now and from April 2029

Low voltage dry type transformers sold in the United States must meet DOE efficiency levels. For a three phase 75 kVA unit the level is 98.60 percent under the 2016 rule. For units made in or imported into the United States on or after April 23, 2029 it rises to 98.88 percent. Rex Power Magnetics notes that this looks small but is a 20 percent cut in losses for three phase units, and that units built before the date can still be sold and installed after it.

Other voltages at 75 kVA

The same frame comes in other windings. A 480 to 240 delta unit feeds older 240 V equipment at 180.4 A. A 600 to 208Y/120 unit serves Canadian and some plant systems. A 208 to 480 step up feeds a 460 V motor or machine from a 208 V service, and a 480 delta to 480Y/277 unit is an isolation transformer, covered on its own page.

How much does a 75 kVA transformer cost

In November 2026 public listings put a new 75 kVA, 480 to 208Y/120 dry type at about $3,200 to $5,500 for common aluminum units and $8,662 for a Square D copper model. Used and reconditioned units listed at $1,000 to $2,000. Freight is extra.

How many amps is a 75 kVA transformer at 480 to 208

90.2 A on the 480 V primary and 208.2 A on the 208Y/120 secondary at full load, three phase.

How much does a 75 kVA dry type transformer weigh

Eaton lists its V48M28T75 at 505 lb, and a reconditioned Hevi-Duty T2H75 is listed at 570 lb. Plan for 500 to 600 lb.

How long does a 75 kVA transformer take to get

A stock unit ships in 3 to 5 business days from sellers such as Maddox. A factory order was quoted at 20 to 32 weeks in 2026 by Terrapin Construction Group for 480 to 208 V dry types.

What changes for 75 kVA transformers in 2029

Units made or imported on or after April 23, 2029 must reach 98.88 percent efficiency, up from 98.60 percent for a three phase 75 kVA unit under the 2016 rule.

Can a 75 kVA dry type transformer go outside

Yes, in a NEMA 3R enclosure or with a weather shield. A ventilated NEMA 1 unit is for indoor use only.