Eaton MD34E88 Motor Drive Isolation Transformer - UL Listed
Part Number: MD34E88
Quick Summary
The motor drive isolation transformer MD34E88 powers motor drives with isolation for reliable automation control. It addresses voltage transients and nuisance shutdowns that disrupt production in control panels. UL Listed certification supports safe operation and regulatory compliance for industrial switchgear and control panels. Designed for dry-type DT-3 distribution with aluminum windings, this transformer delivers robust performance and ease of integration in 60 Hz, three-phase systems, making it a dependable choice for modern automation environments.
Product Information
Extended Description
MD34E88 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 230 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 230Y/133V, 150°C, 34 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD34E88
UPC
786680330117
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
334 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
912B
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
230 V
Secondary Voltage
230Y/133 V
Temperature rise
150 °C rise
Volt ampere rating
34 kVA
Weathershield
WS38
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD34E88
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: Dry-type DT-3 ventilation coupled with aluminum windings enables efficient cooling and reduced thermal stress, improving long-term reliability in motor drive applications where uptime matters. This supports tighter maintenance windows and lower replacement risk in OEM assemblies and panel builds. Feature → Business Impact → Application: 34 kVA rating with a 230 V primary and 230Y/133 V secondary provides clean, isolated power for drive systems, reducing electrical noise and improving drive performance in manufacturing lines. Application: suitable for distribution and control panels requiring consistent voltage under load fluctuations. Feature → Business Impact → Application: Tap changer options (+5% FCAN, -5% FCBN) allow precise voltage regulation, minimizing motor fatigue and optimizing performance during feeders/line voltage variation. Application: critical in systems with variable supply conditions. Feature → Business Impact → Application: Frame 912B with WS38 weather shield supports rugged mounting and protection in industrial environments; installation is simplified with standard dimensions and integrated ventilation. Application: ideal for panel places with limited space or outdoor/rough-duty installations. Feature → Business Impact → Application: UL Listed certification ensures compliance with safety standards, reducing risk during commissioning and enabling faster approvals for control panels. Application: essential for OEMs and integrators targeting regulated markets. Feature → Business Impact → Application: 60 Hz, Three-phase operation with primary 230 V and secondary 230Y/133 V ensures compatibility with common industrial power networks, easing retrofit and new builds. Application: suitable for motor drives, soft starters, and power distribution within automation architectures.
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FAQs
Yes. Mount the MD34E88 on a sturdy base compatible with a 912B frame, ensure proper clearance for ventilation, connect the primary to a 230 V three-phase supply, and wire the secondary as 230Y/133 V. Use the WS38 weather shield for added protection in harsh environments and verify taps are set to the correct +5% or -5% positions as needed.
Key specs include a 34 kVA rating, 60 Hz frequency, three-phase designation, primary 230 V, secondary 230Y/133 V, aluminum windings, DT-3 dry-type design, and a grounded vented construction with a 150 °C rise. It also features taps at +5% FCAN and -5% FCBN for voltage regulation.
Yes. The MD34E88 is specifically designed as a motor drive isolation transformer for three-phase, 60 Hz systems, providing electrical isolation and voltage transformation to protect drives and control circuits from transients and noise.
MD34E88 carries UL Listed certification, reflecting compliance with safety standards for industrial power distribution equipment. It is also backed by Eaton’s warranty policy, typically one year from installation or eighteen months from shipment, whichever comes first.
Being a dry-type transformer with aluminum windings and WS38 protection, the MD34E88 requires minimal ongoing maintenance compared with oil-filled units. Its robust DT-3 design and ventilated construction support reliable operation in demanding environments, contributing to lower lifecycle costs and predictable performance for motor-drive applications.