Eaton MD550E95 Motor drive isolation transformer UL Listed
Part Number: MD550E95
Quick Summary
MD550E95 provides dry-type drive isolation for motor control in industrial power systems. Downtime from voltage spikes, mis-timed starts, and inconsistent drive voltages costs maintenance time and product yield. UL Listed safety certification, the DT-3 dry-type design, and WS35 weather shield support safe, compliant installs in harsh industrial environments. With 550 kVA capacity and 575 V/460Y/266 V outputs, this transformer delivers reliable power conditioning for motor drives and automation systems. This combination of dry-type cooling and ventilated design helps reduce cooling infrastructure costs, supports easier installation in controlled environments and outside enclosures, and minimizes maintenance downtime while enhancing drive isolation performance across frequent start-stop cycles.
Product Information
Extended Description
MD550E95 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: 460Y/266V, 150°C, 550 kVA, Al windings, Frame: 920E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD550E95
UPC
786680339189
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
4107 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
920E
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
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
550 kVA
Weathershield
WS35
Feature: Three-phase, 575 V primary and 460Y/266 V secondary output. Business Impact: Enables direct integration with common motor drives and panelboards, reducing ad-hoc voltage conversion and improving overall system reliability. Application: Motor control centers and automation panels in process industries. The MD550E95 supports precise voltage delivery to motors, improving torque consistency and reducing nuisance tripping. Feature: +/- 5% taps (1 at +5% FCAN, 1 at -5% FCBN). Business Impact: Allows fast voltage compensation for fluctuating supply conditions, preserving drive performance and protecting connected equipment. Application: Sites with variable utility voltage or long feeders. Feature: Dry-type DT-3 design with ventilation and WS35 weather shield. Business Impact: Lower risk of dielectric fluid leaks, simpler maintenance, and extended outdoor installation capability, reducing enclosure needs and lifecycle costs. Application: Outdoor substations and exposed installations in harsh environments. Feature: 550 kVA rating and aluminum winding. Business Impact: Supports heavy motor loads with efficient cooling, delivering robust power conditioning for high-demand drives while maintaining energy efficiency. Application: Large VFD-driven pumps, fans, and conveyors. Feature: Frame 920E, weight and footprint considerations. Business Impact: Provides a clear installation envelope with standardized mounting and compatibility with common rigging practices, easing installation planning. Application: Industrial facilities with constrained footprint or retrofit projects. Feature: Weathershield WS35 and UL Listed certification. Business Impact: Enhances safety, compliance, and service-life predictability, reducing risk during commissioning and routine maintenance. Application: Regulated installations in manufacturing and distribution facilities. Industry insight: Aluminum windings and the DT-3 configuration align with industry best practices for reliability in motor-drive isolation transformers, supporting uptime targets in continuous-process environments while meeting stringent safety standards.
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FAQs
MD550E95 is a three-phase, 575 V primary transformer with a 460Y/266 V secondary, designed for direct integration with standard motor drives and control panels. Its 60 Hz rating and 550 kVA capacity support high-demand VFD applications, while the DT-3 design ensures reliable isolation. This reduces drive-induced voltage spikes and improves overall system stability.
Install MD550E95 in ventilated spaces or semi-enclosed areas, leveraging the WS35 weather shield for outdoor use. Plan for a 36.23 in length, 44.2 in width, and 75 in height footprint, with proper hoisting equipment for its 4107 lb weight. Ensure adequate clearance for cooling, follow UL Listed installation guidelines, and mount on a sturdy base compatible with the 920E frame.
Key specs include three-phase operation, 575 V primary, 460Y/266 V secondary, 60 Hz frequency, 550 kVA rating, DT-3 design, aluminum windings, and +5%/â5% tap options. Temperature rise is rated at 150 °C, with WS35 weather shield support. The unit is UL Listed and designed for motor-drive isolation in industrial environments.
Yes, MD550E95 carries UL Listed certification, confirming compliance with critical safety standards for industrial power distribution. This certification reduces commissioning risk, simplifies qualification with auditors, and supports safer operation within motor drive and automation environments. Adhere to UL guidelines during installation to maintain compliance.
The dry-type design with ventilation minimizes maintenance compared with liquid-filled transformers, lowering leakage risk and cooling requirements. Its high kVA rating supports stable drive operation, reducing downtime and maintenance cycles for motor drives. Warranty terms align with Eaton policy, contributing to predictable total cost of ownership and a faster ROI in high-demand automation setups.