Eaton MD550E96 Motor Drive Isolation Transformer - UL
Part Number: MD550E96
Quick Summary
The Eaton MD550E96 motor drive isolation transformer delivers clean, stable power for drive systems in industrial plants. The device isolates sensitive VFD controllers from motor transients, reducing electrical noise and downtime caused by waveform disturbances. UL Listed for safety, with a 150°C rise and a DT-3 dry-type design, it supports reliable operation in demanding environments. With a 575 V primary and 575Y/332 V secondary, it enables scalable, energy-efficient drive installations. Its ventilated WS35 housing and 920E frame simplify mounting, while the 550 kVA rating matches mid-size drive applications and central distribution needs.
Product Information
Extended Description
MD550E96 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: 575Y/332V, 150°C, 550 kVA, Al windings, Frame: 920E, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD550E96
UPC
786680339202
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
575Y/332 V
Temperature rise
150 °C rise
Volt ampere rating
550 kVA
Weathershield
WS35
Feature → Business Impact → Application: The DT-3 dry-type construction provides inherent insulation and ventilation, improving heat dissipation and reducing maintenance needs, which translates to longer service life and lower total cost of ownership for drive systems in factories. Application: Suitable for centralized motor control centers and panel installations where predictable performance and safety are paramount. Feature → Business Impact → Application: Three-phase 575 V primary with a 575Y/332 V secondary enables direct compatibility with common VFDs and motor networks, streamlining procurement and installation while minimizing wiring complexity. Application: Ideal for industrial drives that require clean power delivery to protect sensitive electronics and reduce EMI. Feature → Business Impact → Application: 550 kVA VA rating supports larger motors and simultaneous drives, improving capacity planning and reducing the need for additional transformers in expanding lines. Application: Useful in packaging, metals, and process automation where peak loads and transient events are frequent. Feature → Business Impact → Application: Tap settings at +5% and -5% FCAN/FCBN allow on-site voltage matching, reducing risk of overvoltage or undervoltage conditions and ensuring drive efficiency. Application: Enables plants with fluctuating supply voltages to maintain stable performance without reconfiguration. Feature → Business Impact → Application: WS35 ventilation and aluminum windings combined with a 150°C rise profile deliver robust thermal performance, enabling vented operation in dusty or hot environments. Application: Suitable for harsh factory floors and outdoor-rated enclosures where cooling and reliability are critical. Feature → Business Impact → Application: One-year Eaton warranty (or 18 months from shipment) provides assurance against manufacturing defects, supporting total cost of ownership optimization and predictable maintenance budgeting. Application: Aligns with asset management programs and service-level expectations in plant operations.
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FAQs
For installation, ensure DT-3 dry-type ventilation is unobstructed to maintain adequate cooling. Mount within a 920E frame footprint with WS35 ventilation and provide proper clearance for connections to the 575 V primary and 575Y/332 V secondary circuits. Verify tapping at +5% FCAN and -5% FCBN to accommodate site voltage variance and ensure UL safety compliance.
Yes. The transformer is rated for three-phase 575 V primary input and provides a 575Y/332 V secondary suitable for most 575 V drive center configurations. Its 550 kVA rating supports multiple drives, and the DT-3 dry-type design helps minimize cooling requirements in standard factory environments.
The MD550E96 is UL Listed, confirming compliance with electrical safety standards for industrial equipment. This certification supports safer installation, reduces risk during maintenance, and aligns with procurement requirements in regulated facilities, contributing to faster project approvals and enhanced risk management.
Eaton provides a one-year warranty from installation or eighteen months from shipment, whichever comes first (Eaton Selling Policy 25-000). This coverage helps mitigate potential manufacturing defects, supports maintenance budgeting, and ensures access to authorized service options and replacement parts if needed.
The motor drive isolation functionality reduces transients and EMI reaching drive controllers, improving uptime and reducing unexpected faults. The ventilated design and aluminum windings support sustained operation in demanding environments, while the voltage-tap options enable stable operation across supply variations, contributing to overall system reliability and performance.