Eaton MD40E76 Motor drive isolation - UL Listed
Part Number: MD40E76
Quick Summary
Eaton MD40E76 motor drive isolation ventilated transformer provides clean, isolated power for three‑phase drive systems in industrial facilities. Operators often battle voltage transients, electrical noise, and harmonics from VFDs that disrupt performance and shorten equipment life. The unit carries UL Listed certification and a DT‑3 dry‑type design, rated for a 150°C rise, aluminum windings, and a rugged 912B frame, ensuring safe, durable operation in demanding environments. With 40 kVA capacity and essential taps, it supports scalable motor control and retrofit projects while maintaining compliant isolation. This translates to reduced downtime, predictable performance, and easier maintenance, aligning with procurement goals for reliability, energy efficiency, and total cost of ownership.
Product Information
Extended Description
MD40E76 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 380 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266, 150°C, 40 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD40E76
UPC
786680057557
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
348 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed
Coil material
Aluminum
Design
DT-3
Frame
912B
Tap size
1 at +5% FCAN, 1 at -5% FCBN
Type
Dry Type Distribution, Drive Isolation Transformer
Frequency rating
60 Hz
Phase
Three-phase
Primary voltage
380 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
40 kVA
Weathershield
WS38
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD40E76
Selling Policy 25-000 - Distribution and Control Products and Services
Feature to business impact to application: The 40 kVA rating provides scalable power isolation for critical motor drives, enabling reliable operation of conveyors, pumps, and fans while reducing nuisance tripping and electrical noise; application in industrial plants improves uptime and energy efficiency. The DT-3 dry-type design with aluminum windings improves thermal performance and resilience under peak loads, delivering safer maintenance windows and longer service life in harsh environments; suitable for retrofit projects and new builds alike. The primary 380 V delta and secondary 460Y/266 V configuration, plus taps at +5% and -5% FCAN/FCBN, offers flexible Voltage conversions to match varying motor and drive inputs; this reduces the need for additional tiered transformers and simplifies installation on existing lines. WS38 weather shield compatibility enhances environmental protection for outdoor or moderately exposed installations, supporting installation in damp or dusty facilities while meeting safety requirements. The 912B frame size, ventilated cooling, and UL Listed certification collectively shorten commissioning time, support compliance, and reduce lifecycle costs by minimizing maintenance interruptions.
Get a Quick Quote for a Eaton MD40E76
Chat with us on WhatsApp - fast responses guaranteed
Need to speak with someone? We'll call you back within 2 hours during business hours
Interested in Eaton MD40E76?
Enquire Now
FAQs
Plan for proper ventilation and clearance around the unit to maintain ventilation for cooling. Mount on a level, solid base with appropriate mounting hardware for the 912B frame, allow for service space for taps and connections, and position the WS38 shield to protect from direct weather while ensuring easy access for maintenance and inspection.
The transformer features a 380 V primary in delta configuration and a 460Y/266 V secondary. It includes taps at +5% FCAN and -5% FCBN to accommodate voltage fluctuations and drive tolerances, supporting stable motor operation across typical factory electrical variations.
Yes. As a dry-type, ventilated transformer with DT-3 design and aluminum windings, it is engineered for rugged industrial use. The WS38 weather shield option adds environmental protection, while the 150°C rise rating supports reliable performance under higher load transients common with motor drives.
The MD40E76 carries UL Listed certification, signifying compliance with safety standards for electrical equipment and ensuring suitability for industrial installation within US markets and related applications.
The unit’s dry-type construction, aluminum windings, and robust DT‑3 design reduce corona and insulation stress, contributing to longer service life and lower maintenance costs. Ventilated cooling and a rugged frame facilitate easier inspection, and UL listing supports ongoing compliance during asset management and upgrades.