3-Phase 460 D - 460 Y 266 (Drive Isolation Transformer)

Overview

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.

Primary Voltage: 460 D

Secondary Voltage: 460 Y 266

Transformer Specifications:

• 60 Hz Frequency
  
• 150°C Temperature Rise
• 220°C Insulation Class
• Primary Adjustment Taps 2 above, 4 below in 2.5% increments
• Electrostatically Shielded
• High Efficiency Aluminum Windings
• Vacuum pressure Impregnated Windings
• K4 Rated
• DOE Exempt
  
• Wall Mountable up to 75kVA
• Lugs included up to 75 kVA

Transformer may appear different than pictured.

Size Guide

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

Dimensions & Weights

Approximate Enclosure Dimensions & Weights