3-Phase 480 D - 240 Y 139 (Step-Down Drive Isolation Transformer)Size Guide SKU # MIT-DY12-011
|kVA||480||240||Startup (low)||Startup (high)|
Primary Voltage: 480 D
Secondary Voltage: 240 Y 139 (Step-Down Drive-Isolation Transformer)
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.
kVA Sizing Recommendation: At least 20% above the rated horsepower on the motor.
- 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
Exact size and shape to vary. Transformers ordered for indoor use may be provided with outdoor enclosure depending on stock. Transformer may appear different than pictured.
Need something different? Contact us for a custom quote: email@example.com
Approximate Enclosure Dimensions & Weights:
|11||21.5in(H), 19.38in(W), 20.2in(D)||150|
|14||21.5in(H), 19.38in(W), 20.2in(D)||180|
|20||28.75in(H), 23.9in(W), 25in(D)||225|
|27||28.75in(H), 23.9in(W), 25in(D)||280|
|34||28.75in(H), 23.9in(W), 25in(D)||305|
|40||28.75in(H), 23.9in(W), 25in(D)||315|
|51||28.75in(H), 23.9in(W), 25in(D)||370|
|63||38in(H), 26in(W), 21in(D)||510|
|75||38in(H), 26in(W), 21in(D)||570|
Shipping rates vary, but generally range between 5-10% of the total purchase price.
Transformers shipping from stock deliver within 3-5 business. Maddox has 22 regional fulfillment centers so delivery is never a few days out!
Maddox Fulfillment Centers
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. We still may be interested in buying the unit back.
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5 Year Warranty
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!