Eaton MD440E94 Motor Drive Isolation Transformer UL Listed
Part Number: MD440E94
Quick Summary
Eaton MD440E94 motor drive isolation transformer provides clean, isolated power for drive systems in industrial motor control centers. It helps reduce voltage variability and electrical noise that can degrade drive performance and shorten equipment life. UL Listed safety certification accompanies a robust dry-type DT-3 design rated for 60 Hz three-phase operation, with a 150°C rise and WS35 weather protection. This combination supports reliable automation deployment, while the 440 kVA rating and +5%/−5% taps enable scalable applications in modern factories and energy-efficient plant upgrades.
Product Information
Extended Description
MD440E94 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 575 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 440 kVA, Al windings, Frame: 919E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD440E94
UPC
786680339103
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2566 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
919E
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
575 V
Secondary Voltage
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
440 kVA
Weathershield
WS35
Feature → Business Impact → Application: The DT-3 dry-type ventilated construction enables safer, cooler operation in demanding environments, reducing thermal stress on windings and extending service life for motor drives in automated lines. Business impact includes lower maintenance costs and improved uptime; application in factory automation where drive isolation improves startup reliability. Feature → Business Impact → Application: With a 440 kVA rating at 575 V primary and 230Y/133 V secondary, the transformer delivers high power density with consistent voltage conditioning, reducing equipment trips and enabling stable motor performance in large production cells. Application: heavy manufacturing lines and HVAC drive networks. Feature → Business Impact → Application: Clocking taps at +5% and −5% provide voltage flexibility to compensate for distribution variance, minimizing phase currents and protecting drives during grid fluctuations. Application: sites with variable utility voltage. Feature → Business Impact → Application: Weathershield WS35 protection supports outdoor or harsh environments, lowering enclosure costs and expanding installation options. Application: outdoor substations and field installations. Feature → Business Impact → Application: Aluminum windings improve thermal conductivity and corrosion resistance, reducing maintenance and extending life in corrosive industrial spaces. Application: chemical plants and marine terminals. Feature → Business Impact → Application: UL Listed certification ensures safety compliance and streamlined commissioning, accelerating project timelines and reducing risk. Application: regulated industrial facilities. Feature → Business Impact → Application: Warranty coverage (one year from installation or eighteen months from shipment) provides a clear value proposition for asset tracking and lifecycle budgeting. Application: procurement planning and service contracts.
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FAQs
MD440E94 is a three-phase, 60 Hz dry-type transformer designed for motor control centers. Plan for indoor or WS35-protected outdoor placement, ensure adequate clearance for ventilation and service access, and use proper hoisting equipment given the 2566 lb weight. Verify compatibility with 575 V primary and 230Y/133 V secondary distribution in your MCC.
The unit delivers 440 kVA with a 575 V primary and 230Y/133 V secondary, configured as a three-phase, 60 Hz transformer. It features DT-3 dry-type insulation, aluminum windings, a 150°C rise, and +5%/−5% taps. Dimensions are 36.23 in L, 75 in H, 44.2 in W, with a weight of 2566 lb.
Yes. The MD440E94 uses the WS35 Weathershield and is designed for protective outdoor or harsh-environment installations when paired with appropriate mounting and enclosure provisions. This enhances durability in outdoor industrial environments while maintaining transformer performance for motor-drive applications.
The MD440E94 carries UL Listed certification, confirming adherence to widely recognized electrical safety standards. This certification helps streamline regulatory compliance, procurement, and commissioning in industrial facilities, reducing project risk during installation and warranty validations.
As a dry-type, ventilated transformer with an aluminum winding and WS35 protection, the MD440E94 offers robust reliability with relatively low maintenance compared to liquid-filled units. It comes with a one-year warranty (or 18 months from shipment), contributing to lifecycle budgeting and predictable maintenance planning for automation assets.