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

WHY BUY USED?

Same Warranty. Better Price.

Used transformers carry the same warranty as new ones with pictures and test results available on request. Give us a call and we’ll check our inventory.

Overview 

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.

Learn when you should use a drive isolation transformer.

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
  
• High Efficiency Aluminum Windings
  
• NEMA 3R Outdoor/Indoor Enclosure
• DOE Exempt

Transformer may appear different than pictured.

Wall brackets are not included with every model. Contact us if these are required.

Size Guide

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

Dimensions & Weights

Approximate Enclosure Dimensions & Weights