Eaton MD40E96 Motor drive isolation transformer - UL Listed
Part Number: MD40E99
Quick Summary
MD40E96 is an Eaton motor drive isolation ventilated transformer for three-phase industrial power distribution. It reduces startup surges and minimizes downtime in motor-drive applications. UL Listed certification ensures electrical safety compliance for industrial installations. With aluminum windings in a DT-3 dry-type design and a 40 kVA rating, it delivers reliable power to automation panels while supporting compact layouts. Designed for WS38 weather shield compatibility and a 912B frame, installation in existing switchgear is straightforward. Engineers gain confidence from Eaton's technical support and a one-year warranty, helping shorten procurement and installation cycles. Its 575 V primary and 575Y/332 V secondary align with standard industrial power systems and simplify panel design.
Product Information
Extended Description
MD40E99 Eaton: Eaton Motor drive isolation ventilated transformer 40 KVA DRIVE ISOL 3PH 480 DELTA-480 DELTA 150C RISE
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD40E99
UPC
786680134647
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
351 lb
Certifications
Contact Manufacturer
Type
Ventilated transformer
DT-3 dry-type construction with ventilated cooling reduces insulation hazards and simplifies temperature management, enabling safer operation in tight control panels and in environments with limited space. This translates to improved reliability and easier regulatory compliance in harsh industrial settings. The 40 kVA rating paired with a 575 V primary and 575Y/332 V secondary ensures seamless compatibility with common three-phase motor drives, reducing integration time and the need for custom transformers in automation projects. Voltage taps at +5% FCAN and -5% FCBN stabilize output during supply fluctuations, improving drive performance and reducing nuisance tripping in variable power conditions. Frame 912B with aluminum windings provides robust mechanical strength while keeping weight manageable, facilitating installation in existing housings and reducing mounting complexity. WS38 weather shield availability extends resilience in outdoor or dusty environments, supporting uptime in harsh plants. UL Listed certification confirms safety and compliance, reducing risk during audits and facilitating procurement decisions in regulated facilities.
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FAQs
MD40E96 installs in three-phase switchgear or control panels using its DT-3 dry-type design and 912B frame. Connect the 575 V primary to the incoming three-phase supply, then land the 575Y/332 V secondary to the motor drive circuit. Use the +5% and -5% voltage taps to fine-tune output and ensure proper clearance for ventilation. Follow safety practices and Eaton’s installation notes to minimize downtime.
Key specs include a 40 kVA VA rating, three-phase configuration at 60 Hz, primary 575 V, secondary 575Y/332 V, DT-3 dry-type insulation, aluminum windings, frame 912B, and WS38 weather shield option. The device provides 16.5 in length, 30 in height, and 23 in width with a weight of 358 lb, and supports +5%/ -5% tap changes.
Yes. Its drive isolation design minimizes voltage transients and EMI coupling into sensitive drive electronics. The 40 kVA rating and three-phase 575 V to 575Y/332 V secondary configuration align with common industrial motor drives, simplifying integration into automation panels and reducing the need for additional isolation equipment.
MD40E96 carries UL Listed certification, signaling compliance with essential electrical safety standards for industrial installations. This certification supports safer procurement, audit readiness, and smoother approvals in regulated facilities within manufacturing and process environments.
The dry-type design with aluminum windings reduces insulating oil hazards and related maintenance. The WS38 weather shield option enhances reliability in challenging environments, contributing to longer service life and lower maintenance costs. The robust DT-3 construction and standard voltages minimize downtime during upgrades and panel redesigns, delivering a favorable total cost of ownership for motor-drive systems.