Eaton MD51E94 Motor drive isolation transformer - UL Listed
Part Number: MD51E94
Quick Summary
The Eaton MD51E94 motor drive isolation ventilated transformer delivers isolated power for motor drives in industrial systems. Many plants struggle with voltage dips and transient surges that shorten equipment life and inflate maintenance costs. UL Listed safety certification ensures code compliance; CE and IP certifications are not listed for this model. In practice, this translates to reliable drive isolation, reduced downtime, and easier warranty support from Eaton. The DT-3 dry-type design, WS39 weather shield, and 51 kVA rating make it a robust choice for modern industrial motor drives. Designed for ease of installation in control panels, the MD51E94 supports standard Eaton catalog accessories and straightforward field commissioning.
Product Information
Extended Description
MD51E94 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, 51 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD51E94
UPC
786680338465
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
513 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
51 kVA
Weathershield
WS39
Feature: Dry-type, ventilated DT-3 transformer with aluminum windings provides clean, oil-free power isolation for drive electronics. Business impact: isolates sensitive motor drives from mains disturbances, reducing voltage spikes, noise, and thermal stress that shorten component life and trigger nuisance trips; this translates to higher line-reclaim uptime and predictable performance in mission-critical processes. Application: ideal for motor drive control panels powering conveyors, pumps, and CNC axes in manufacturing and packaging lines. Feature: 51 kVA rating with a 575 V primary and 230Y/133 V secondary ensures ample headroom for peak drive loads while maintaining stable output under varying loads; business impact: supports soft-starts and regenerative drives, minimizes voltage drop across feeders, and reduces need for oversized upstream transformers. Application: suitable for three-phase drive systems in heavy-industrial settings, including lifting, mixing, and process automation. Feature: Tap changers at +5% FCAN and -5% FCBN provide on-site voltage tuning; business impact: improves voltage regulation across a plant's diverse loads, reducing derating and extending motor life. Application: beneficial in plants with variable line voltage or long transformer feeder runs, enabling quick field adjustments without external equipment. Feature: Frame 914D with WS39 weather shield supports rugged installation in harsh environments; business impact: enhances heat dissipation with 150°C rise capability, reduces overheating risk, and enables safer, longer service intervals. Application: mounting in switchgear, switchboards, and distribution centers demanding reliable dry-type transformers in industrial facilities. Feature: UL Listed certification and Eaton warranty provide safety and post-sale support; business impact: ensures compliance with electrical codes, faster procurement, and predictable service terms. Application: suitable for controlled rollouts of motor drives across multiple lines and plants, with easy integration into existing Eaton product ecosystems and equipment catalogs. Designed for ease of installation in control panels, the MD51E94 supports standard Eaton catalog accessories and straightforward field commissioning.
Get a Quick Quote for a Eaton MD51E94
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 MD51E94?
Enquire Now
FAQs
Mount the three-phase 575 V primary and 230Y/133 V secondary with proper clearance for the ventilated dry-type transformer. Use the 914D frame and WS39 weather shield to facilitate cooling. Ensure service access and compliant wiring, and plan for the +5% and -5% taps during commissioning to match supply conditions.
With a 51 kVA rating, 575 V primary, and 230Y/133 V secondary, the MD51E94 supports peak drive loads while maintaining voltage stability at 60 Hz. The aluminum windings, DT-3 design, and 150 °C rise enable reliable operation in demanding environments and reduce drive-side transients that can trip converters.
Yes, the 51 kVA capacity, three-phase operation, and ventilated dry-type construction make it ideal for motor-drive panels serving conveyors, pumps, and CNC equipment. The taps and sharp enclosure help keep voltage in spec, while UL Listed certification supports compliance in plant electrical rooms.
MD51E94 is UL Listed, indicating compliance with recognized safety standards for electrical equipment in U.S. electrical rooms. The data does not specify CE, IP, or other regional certifications; for projects requiring these marks, consult Eaton's technical resources or request documentation to verify applicable approvals for your facility.
As a dry-type transformer with WS39 housing and aluminum windings, maintenance requirements are minimal compared with oil-filled units, reducing lifetime service costs. The 150 °C rise rating ensures reliable operation in hot environments, while the 25-000 warranty policy provides post-sale support. The result is predictable uptime and improved total cost of ownership for drive systems.