Eaton MD550E73 Motor drive isolation ventilated transformer - UL Listed
Part Number: MD550E73
Quick Summary
Eaton MD550E73 motor drive isolation ventilated transformer delivers clean, isolated power for drive systems in industrial automation. This package reduces nuisance tripping and voltage fluctuations, addressing a common pain point on dense factory floors. UL Listed safety certification supports compliance with electrical codes, while the DT-3 dry-type design and WS35 weather shield expand installation options. Designed for durability and long service life, MD550E73 delivers reliable motor control with efficiency and predictable ROI for modern manufacturing environments.
Product Information
Extended Description
MD550E73 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: 460 delta, 150°C, 550 kVA, Al windings, Frame: 920, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD550E73
UPC
786680087219
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2948 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
920
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
460 V
Temperature rise
150 °C rise
Volt ampere rating
550 kVA
Weathershield
WS35
Feature → Business Impact → Application: Ventilated dry-type transformer construction reduces moisture risk and simplifies maintenance in harsh environments, enabling longer intervals between service windows and lower upkeep costs for drive systems. Application: Ideal for motor drives and control panels in manufacturing facilities where clean power and isolation minimize nuisance tripping and electromagnetic interference. Feature → Business Impact → Application: Three-phase 460 V primary and secondary with a 550 kVA rating supports large motor loads, improving system resilience and startup torque without overloading feeders. Application: Heavy machinery and automated lines requiring robust power isolation and stable voltage during startup. Feature → Business Impact → Application: Voltage taps at +5% FCAN and -5% FCBN provide precise regulation to accommodate supply fluctuations, reducing equipment wear and extending drive lifespan. Application: Critical velocity control, servo drives, and CNC equipment. Feature → Business Impact → Application: Aluminum windings paired with a DT-3 design and a 150 °C rise balance thermal performance with compact frame 920 sizing, enabling reliable operation in high-temperature environments. Application: Industrial plants and outdoor substations where space and heat management are key. Feature → Business Impact → Application: Weathershield WS35 and UL Listed certification offer environmental protection and safety compliance, accelerating installation approvals and reducing risk. Application: Outdoor installations or exposed indoor panels. Feature → Business Impact → Application: Large footprint and weight (36.23 in L, 44.2 in W, 75 in H, 2948 lb) demand solid foundation design, but provide a stable platform for long-term uptime and predictable maintenance planning. Application: Primary distribution boards and energy-intensive lines.
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FAQs
MD550E73 requires a solid foundation and clearances for a three-phase, 460 V system. Dimensions are 36.23 in (L) x 44.2 in (W) x 75 in (H) with a weight of 2948 lb, frame 920. Plan for adequate service access, proper enclosure or indoor/outdoor placement with WS35 protection, and compatible termination provisions for taps at +5% and -5%.
Key specs include a 550 kVA rating, 60 Hz frequency, three-phase operation, 460 V primary and 460 V secondary, aluminum windings, DT-3 design, and a maximum temperature rise of 150 °C. It also features voltage taps at +5% FCAN and -5% FCBN and a WS35 weather shield for environmental protection.
Yes. The MD550E73 delivers robust drive isolation suitable for large motor drives and CNC equipment. Its dry-type construction and ventilation support reliable operation in manufacturing environments, while the 460/460 V configuration and 550 kVA rating manage startup surges and load variability with reduced EMI and improved uptime.
The MD550E73 is UL Listed, confirming compliance with recognized electrical safety standards. This certification, coupled with Eaton’s warranty terms, helps streamline installation approvals and ongoing maintenance planning within standard electrical codes and facility safety programs.
The design uses aluminum windings with a DT-3 dry-type structure and WS35 protection to resist environmental stress, reducing corrosion and moisture-related faults. The unit’s high thermal capacity and solid frame improve uptime, enabling predictable ROI through lower downtime, fewer repairs, and extended service life in demanding industrial applications.