3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)
3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)

3-Phase 480 D - 240 Y 139 (Drive Isolation Transformer)

SKU: MIT-DIT-150
Size:

Size

Sale price$1,503
Quantity:

Estimated Delivery Date:

Transformer is in stock! Delivers in 5 - 7 business days

Primary Voltage: 480 D

Secondary Voltage: 240 Y 139

Maddox Drive-Isolation Transformers are designed to meet the rugged demands of both AC and DC variable speed drives and provide the required voltage change.

The separate windings provide electrical isolation between the incoming power and the SCR or VFD load. The windings are designed to withstand overcurrent at 150% of the rated load for 60 seconds or 200% of the rated load for 30 seconds, as well as minor harmonic noise at or below K-Factor 4. Standard duty cycle is one start every two hours.

Drive Isolation Transformers are sized to match standard motor horsepower and voltage ratings.

Standard sizes range from 5 to 600 HP in six standard voltages.

Transformer Specifications:

  • CSA and UL Approved
  • 60 Hz Frequency
  • 150°C Temperature Rise
  • 220°C Insulation Class
  • Primary Adjustment Taps 1 above, 1 below in 5% increments
  • Electrostatically Shielded
  • High Efficiency Aluminum Windings
  • Vacuum pressure Impregnated Windings
  • NEMA 3R Outdoor/Indoor Enclosure
  • DOE Exempt
  • Wall Mountable up to 75kVA
  • Lugs included up to 75 kVA

Transformer may appear different than pictured.

 

Size Guide

kVA Amps at 480 Amps at 240 Startup Amps (low) Startup Amps (high)
11 13 26 106 159
14 17 34 135 202
20 24 48 192 289
27 32 65 260 390
34 41 82 327 491
40 48 96 385 577
51 61 123 491 736
63 76 152 606 909
75 90 180 722 1083

 

kVA Sizing Recommendation: At least 20% above the rated horsepower on the motor.

Dimensions & Weights

kVA Dimensions (HxWxD) Weight (lbs)
11 21.5"x19.38"x20.2" 150
14 21.5"x19.38"x20.2" 180
20 28.75"x23.9"x25" 225
27 28.75"x23.9"x25" 280
34 28.75"x23.9"x25" 305
40 28.75"x23.9"x25" 315
51 28.75"x23.9"x25" 370
63 38"x36"x21" 510
75 38"x36"x21" 570


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