Eaton MD51E68 Motor drive isolation ventilated transformer - UL Listed
Part Number: MD51E68
Quick Summary
MD51E68 motor drive isolation ventilated transformer provides isolated, clean power for three-phase drive systems. Engineers face voltage transients, EMI, and insulation degradation that drive costly downtime and maintenance. UL Listed certification ensures safety and reliability, while the DT-3 dry-type design and 150°C rise enable dependable operation in ventilated enclosures. Designed for 60 Hz, three-phase service with 460 V primary and 208Y/120 V secondary, it supports scalable motor control architectures and OEM retrofits. This combination reduces energy losses and simplifies installation across industrial automation projects.
Product Information
Extended Description
MD51E68 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 208Y/120, 150°C, 51 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD51E68
UPC
786680062803
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
498 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
460 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Volt ampere rating
51 kVA
Weathershield
WS39
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD51E68
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: The DT-3 dry-type design with aluminum windings minimizes thermal buildup in ventilated enclosures, improving reliability and reducing cooling requirements for motor drives in packaging, material handling, and process automation. Application: Install in switchgear or control panels where compact heat management and durable insulation are critical. Feature → Business Impact → Application: Three-phase 60 Hz operation with a 460 V primary and 208Y/120 V secondary aligns with standard plant power and VFD interfaces, enabling seamless integration with existing motor drives and control networks. Application: OEM line upgrades and retrofits in conveyors and pumps. Feature → Business Impact → Application: Tap changes at +5% FCAN and -5% FCBN provide voltage regulation to accommodate supply variations, reducing motor wear and improving performance under unstable feeders. Application: Industrial facilities with variable single- and three-phase input conditions. Feature → Business Impact → Application: Frame 914D and WS39 weather shield support rugged installation, quick mounting, and protection in dusty or mildly aggressive environments. Application: Outdoor or semi-enclosed control rooms and retrofit projects. Feature → Business Impact → Application: UL Listed certification and comprehensive Eaton specifications streamline procurement and compliance, reducing vendor risk and accelerating project timelines. Application: Data sheets and purchasing cycles for electrical distributors and MROs.
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FAQs
MD51E68 supports 60 Hz, three-phase operation with a 460 V primary and 208Y/120 V secondary. Ensure proper ventilation, mount on a solid base, and connect primary and secondary windings according to the DT-3 dry-type installation guidelines. The WS39 weather shield aids external protection, while the +5% / -5% tap changes help compensate for supply variations.
Key specs include 51 kVA VA rating, 460 V primary, 208Y/120 V secondary, 60 Hz frequency, three-phase configuration, DT-3 dry-type design, aluminum windings, and a 150°C rise. The transformer is rated for ventilated operation and features taps at +5% FCAN and -5% FCBN for voltage adjustment.
Yes. The DT-3 dry-type construction with aluminum windings and WS39 weather shield provides robust isolation in ventilated enclosures. Its 150°C rise rating supports higher ambient temperatures, while UL Listed certification confirms safety and reliability for industrial drive banks.
The MD51E68 carries UL Listed certification, indicating compliance with safety standards for electrical equipment. This credential supports procurement and installation in regulated environments and facilitates passing commissioning reviews for motor drive applications.
The transformer reduces downtime by providing clean, isolated drive power and mitigating EMI and voltage transients that can damage drives. With a durable dry-type design and reliable cooling, maintenance intervals are extended, supporting longer service life and lower total cost of ownership for motor drive systems.