Eaton MD440E95 Motor Drive Isolation Transformer - UL Listed
Part Number: MD440E95
Quick Summary
MD440E95 motor drive isolation transformer provides clean, isolated power for three-phase motor drives. This design addresses the common pain point of voltage spikes and harmonics that can shorten drive life and increase maintenance. UL Listed certification supports safety and reliability in demanding environments where downtime matters. The unit is a dry-type, ventilated transformer with a DT-3 design, WS35 weather shield option, and a 150°C rise to handle tough industrial conditions. For project teams, it combines robust electrical isolation with straightforward installation, helping you meet compliance while improving uptime and overall equipment efficiency.
Product Information
Extended Description
MD440E95 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, 440 kVA, Al windings, Frame: 919, uses WS35
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD440E95
UPC
786680339127
Product Length/Depth
36.23 in
Product Height
75 in
Product Width
44.2 in
Product Weight
2400 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
919
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
440 kVA
Weathershield
WS35
Feature → Business Impact → Application: Three-phase dry-type distribution transformer delivers safe, isolated power directly to motor drives, reducing insulation stress and extending drive life in high-demand manufacturing lines. Application: CNC shops, packaging lines, and process plants; ideal where clean power and fast deployment are critical. Feature → Business Impact → Application: 575 V primary and 460Y/266 V secondary voltages enable seamless compatibility with common medium-voltage distributions and motor drives, minimizing wiring complexity and downtime. Application: Panel boards and drive rooms needing reliable step-down for motor control. Feature → Business Impact → Application: 440 kVA VA rating provides substantial headroom for peak motor inrush, improving startup reliability and reducing nuisance tripping in dynamic loads. Application: conveyors, presses, and large fans where load swings occur. Feature → Business Impact → Application: Tap settings (+5% FCAN, -5% FCBN) allow on-site voltage fine-tuning to compensate for feeder losses or transformer drop, preserving motor performance. Application: retrofits and new installations with variable loads. Feature → Business Impact → Application: Aluminum windings and frame 919 construction offer light mechanical rigidity with corrosion resistance, enabling installation in factory environments and reducing maintenance costs. Application: harsh environments and high-cycle installations. Feature → Business Impact → Application: WS35 weather shield option improves protection against dust and moisture in semi-exposed locations, extending service life. Application: outdoor or semi-enclosed transformer housings. Feature → Business Impact → Application: 150°C rise rating supports higher thermal tolerance, enabling continuous operation under elevated ambient temperatures without derating. Application: warm climates or areas with limited cooling capacity. Feature → Business Impact → Application: UL Listed certification provides documented safety compliance, aiding procurement and regulatory alignment. Application: industrial distribution centers and OEM integrators needing verified standards. Feature → Business Impact → Application: 60 Hz, three-phase specifications align with North American electrical systems, simplifying engineering acceptance, installation planning, and maintenance scheduling. Application: plant-wide motor control corridors and drive rooms.
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FAQs
To install MD440E95, mount on a stable base, allow clearance for ventilation, wire to a 3-phase distribution panel at 575 V primary, and connect 460Y/266 V secondary to the drive input. Use the WS35 shield when located in dusty or humid environments, and ensure the unit’s taps are set to +5% FCAN and -5% FCBN as required by feeder conditions.
Key specs include 575 V primary, 460Y/266 V secondary, 60 Hz, three-phase operation, 440 kVA rating, DT-3 design, aluminum windings, and a 150°C rise. Tap options are +5% and -5% to accommodate voltage variations. Construction is dry-type and ventilated for efficient cooling.
Yes, it is a dry-type, ventilated transformer designed for industrial use. The WS35 weather shield option enhances protection against dust and moisture, and DT-3 with frame 919 provides rugged mechanical support suitable for demanding plant environments.
The MD440E95 is UL Listed, providing validated safety compliance for electrical equipment in many regions. This helps with procurement approvals and reduces engineering risk during projects that require certified components.
Maintenance is typically low due to dry-type construction and aluminum windings, but periodic inspection of cooling paths and enclosure sealing is advised. The model’s 440 kVA rating supports uptime for peak motor loads, and the Eaton warranty offers protection per policy 25-000 (one year from installation or 18 months from shipment, whichever comes first).