Eaton MD75E94 Motor Drive Isolation Transformer - UL Listed
Part Number: MD75E94
Quick Summary
The Eaton MD75E94 motor drive isolation transformer protects drives and improves power quality in industrial automation. This helps address downtime and equipment damage caused by harmonics, transients, and voltage excursions common in modern production lines. UL Listed safety certification ensures compliance with electrical and safety standards, while the DT-3 dry-type design and WS39 weather shield bolster reliability in harsh plant environments. Designed for panel builders, OEMs, and maintenance teams, it simplifies installation with a symmetrical footprint (914D frame) and accessible taps for voltage tuning. With a 60 Hz three-phase configuration and a 75 kVA rating, it delivers robust isolation while supporting efficient, predictable motor performance across diverse applications.
Product Information
Extended Description
MD75E94 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, 75 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD75E94
UPC
786680338588
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
480 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
914D
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
75 kVA
Weathershield
WS39
Feature: Three-phase DT-3 dry-type design with ventilated cooling and aluminum windings. Business impact: Reduces heat buildup, improves reliability, and lowers long-term maintenance costs by using durable, corrosion-resistant windings. Application: Ideal between motor drives and motors in harsh factory environments where ventilation is essential. Feature: 575 V primary and 230Y/133 V secondary with 60 Hz operation and a 75 kVA rating. Business impact: Supports high-load drive applications while maintaining stable voltage transformation, improving motor efficiency and process control. Application: Packaging lines, conveyors, CNCs, and other automation stages requiring dependable isolation. Feature: Tap changes at +5% FCAN and -5% FCBN. Business impact: Enables fine voltage regulation to match site conditions, reducing nuisance tripping and equipment stress. Application: Systems with variable input voltage or motor loads. Feature: WS39 weather shield, DT-3 frame 914D, and aluminum coil material. Business impact: Enhances outdoor or rugged plant installations with proven mechanical protection and long service life. Application: Panel boards, switchgear rooms, and documented safety-compliant installations. Feature: UL Listed certification and Eaton warranty terms. Business impact: Provides regulatory confidence and risk mitigation, with a one-year standard warranty (or 18 months from shipment) for incentives in project procurement. Application: OEM integration, facilities upgrades, and maintenance planning. Feature: Weight, dimensions, and mounting compatibility. Business impact: Predictable footprint (22 in L, 39 in H, 29 in W) simplifies retrofits and reduces installation time. Application: Retrofit projects and new line builds requiring a standard 914D frame and WS39 protection.
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FAQs
The MD75E94 is a three-phase dry-type drive isolation transformer from Eaton, rated 75 kVA with 575 V primary and 230Y/133 V secondary. It sits between motor drives and motors to improve power quality and protect drives in industrial automation environments such as packaging lines, conveyors, and CNC systems.
Key specs include three-phase 60 Hz operation, primary voltage 575 V, secondary voltage 230Y/133 V, 75 kVA VA rating, and taps at +5% FCAN and -5% FCBN to tune output. The design is DT-3 with aluminum windings and a 150 °C rise.
Yes. It uses a 914D frame with DT-3 dry-type construction and WS39 weather shield, making it compatible with standard industrial enclosures and ventilated installations. Its footprint (22 in L x 39 in H x 29 in W) supports straightforward retrofits and panel mounting between drives and motors.
The MD75E94 carries UL Listed certification, confirming safety compliance for electrical equipment installed in industrial environments.
Benefits include reduced downtime from voltage disturbances, protection for drive electronics, and longer motor drive life. The transformer’s rugged dry-type design, aluminum windings, vented cooling, and weather shield support long service intervals, with a standard one-year warranty (up to 18 months from shipment).