3-Phase 480V Delta - 240V Delta / 120
Size
Winding Material
Estimated Delivery Date: (call to expedite)
Transformer is in stock! Delivers in 5 - 7 business days
This transformer is designed to convert 3-phase 480v to 3-phase 240v to run equipment such as panels, motors, CNC machines, welders, conveyor systems, pumps, printing equipment, fabrication tools, cryptocurrency miners, datacenter equipment, and other business machines.
Primary Voltage: 480 Delta
Secondary Voltage: 240 Delta / 120
This model comes with a center tap (AKA lighting tap) to run 1-phase 120v power off the secondary. The center tap can provide 5% of the total kVA rating without taking away from the overall capacity.
This transformer can be reverse fed to achieve a step up from 240V to 480V, but the adjustment taps do not work if you do this, and the inrush is greater than using a specially designed step-up transformer.
Read more about reverse feeding.
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
- Energy Efficient
Transformer may appear different than pictured.
Size Guide
| kVA | Amps at 480v | Amps at 240V | Amps at 120V LT |
|---|---|---|---|
| 15 | 18 | 36 | 3 |
| 30 | 36 | 72 | 7 |
| 45 | 54 | 108 | 11 |
| 75 | 90 | 180 | 18 |
| 112.5 | 135 | 271 | 27 |
| 150 | 180 | 361 | 36 |
| 225 | 271 | 541 | 54 |
| 300 | 361 | 722 | 72 |
| 500 | 601 | 1203 | 120 |
The 120v lighting tap is intended for small ancillary 1-phase power needs (such as lighting, and outlets) and can support loads of up to 5% of the total amperage of the transformer. Loading the 120v lighting tap over 5% will result in a de-rating the total kVA.
Dimensions & Weights
| kVA | Dimensions (HxWxD) | Weight (lbs) |
| 15 | 28"x21"x14" | 220 |
| 30 | 32"x27"x17" | 320 |
| 45 | 32"x27"x17" | 385 |
| 75 | 39"x29"x20" | 565 |
| 112.5 | 41"x32"x22" | 725 |
| 150 | 41"x32"x22" | 860 |
| 225 | 52"x41"x27" | 1375 |
| 300 | 52"x41"x27" | 1610 |
| 500 | 66"x51"x32" | 2850 |
Approximate Enclosure Dimensions & Weights
Shipping rates vary, but are generally 10% of the total purchase price.
Transformers deliver in 5-7 business days.
Read more here: Shipping Policy
Ordered the wrong unit, or not sure if a product is right for you? Our web store exchange policy has you covered! We’ll send you a replacement transformer, all you pay for is shipping, plus the difference in unit price. Our policy lasts 30 days. If 30 days have gone by since your purchase, we cannot offer you a refund or exchange, but we still may be interested in buying the unit back. Proof of purchase is required to process a return or exchange.
Read more here: Return and Refund Policy
Buy with confidence. All new and used Maddox transformers are tested and come with a full 5 year warranty against defects. If you experience any problems just give us a call and receive a replacement, free of charge. We'll even pay the shipping!
Read more here: Warranty, Terms and Conditions
Reviews from our customers:
“I spoke with Josh Long and he was the most knowledgeable sales rep on transformers I had the pleasure of speaking with during my 2 month long ordeal to find a very specific transformer for my machine from overseas. I really appreciate his expertise on the matter and I look forward to working Josh again.”
Hien Tran“I love this company. I'm an electrical contractor and I use them for all my transformer needs and recommend them wherever I can. Josh Long and Chris Stouffer always return my calls and answer my emails. They provide a great, personalized service. It's nice to go straight to the source to buy rather than going through an electrical supply house or another middle man.”
Naomi Doire“Your service and response was impeccable. The equipment quality is excellent. It was a pleasure to work with Jeremiah. He was fantastic, sent me all the drawings and paperwork superfast. Can't wait to need another transformer. Thank you very much.”
Elliott Foy