Eaton MD34E92 Motor drive isolation transformer - UL Listed
Part Number: MD34E92
Quick Summary
Eaton MD34E92 motor drive isolation transformer is a robust solution for protecting drive circuits in industrial power systems. Engineers often contend with voltage spikes, panel overheating, and unplanned downtime when drives connect to variable power. UL Listed certification reinforces safety and helps ensure compliant panel assemblies. This 34 kVA three-phase transformer features a 460 V primary and 460Y/266 V secondary, with +5% and -5% taps and WS38 weather shield for outdoor or harsh environments. Designed for installation in control panels and motor control centers, it supports fast commissioning and consistent performance across temperature rise up to 150 °C, enabling reliable automation across diverse industrial environments.
Product Information
Extended Description
MD34E92 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 460 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 460Y/266V, 150°C, 34 kVA, Al windings, Frame: 912B, uses WS38
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD34E92
UPC
786680331718
Product Length/Depth
16.5 in
Product Height
30 in
Product Width
23 in
Product Weight
348 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
460 V
Secondary Voltage
460Y/266 V
Temperature rise
150 °C rise
Volt ampere rating
34 kVA
Weathershield
WS38
Commercial Distribution, Transformers, Volume 2, Tab 2
Eaton Specification Sheet - MD34E92
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Business Impact → Application: The MD34E92 uses a DT-3 dry-type distribution design with aluminum windings and a 912B frame, delivering reliable voltage isolation while minimizing cooling requirements in enclosed panels; this translates to lower cooling costs and simpler enclosure design for machine builders and panel shops. Feature → Business Impact → Application: 34 kVA three-phase capability with a 460 V delta primary and 460Y/266 V secondary enables direct compatibility with modern motor drives and automation controllers, reducing the need for additional step-down equipment in automation cabinets. Feature → Business Impact → Application: Tap changers (+5% FCAN, -5% FCBN) allow precise voltage matching to site power, improving drive performance and reducing motor stress in variable electrical environments. Feature → Business Impact → Application: WS38 weather shield and ventilated construction provide environmental protection and cooling efficiency for installations exposed to dust, humidity, or outdoor conditions, supporting longer service life in harsh manufacturing floors. Feature → Business Impact → Application: Aluminum windings offer corrosion resistance and lower temperature rise compared to copper in some configurations, contributing to lower lifetime maintenance costs and stable performance in automation lines. Feature → Business Impact → Application: UL Listed certification supports compliance during system integration, easing supplier audits and helping ensure safe, repeatable panel builds across automotive, packaging, and process automation sectors.
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FAQs
For installation, plan space to accommodate a 23 in wide, 30 in high, and 16.5 in deep unit weighing 348 lb. Ensure adequate ventilation and access for maintenance, as the transformer uses a ventilated dry-type DT-3 design with WS38 protection. Mounting should support the 912B frame and allow clear clearance for wiring to the primary 460 V delta and secondary 460Y/266 V connections.
The MD34E92 features a 460 V primary (delta) and a 460Y/266 V secondary. It also includes taps at +5% FCAN and -5% FCBN to help accommodate site voltage variations, improving drive performance and reducing voltage-related drive stress in industrial automation environments.
Yes, the MD34E92 is UL Listed, indicating conformity with recognized safety standards for electrical equipment. This certification supports safer panel integration, simplifies supplier qualification, and helps meet regulatory requirements for industrial automation projects and customer audits.
This transformer is designed for motor drive isolation in control panels, motor control centers, and automation racks. Its dry-type DT-3 construction and ventilated design suit environments with moderate to high heat, while the 34 kVA rating supports drive isolation for mid-range automation equipment, reducing drive interference and improving system reliability.
The transformer carries Eaton’s warranty per Selling Policy 25-000, typically one year from installation or eighteen months from shipment, whichever occurs first. This coverage supports commissioning and early-life reliability, with standard service and replacement options available through Eaton’s distributor network.