Eaton MD75E83 Motor Drive Isolation Transformer - UL Listed
Part Number: MD75E83
Quick Summary
The Eaton MD75E83 motor drive isolation transformer delivers clean, isolated power for motor drives in automation. Engineers often wrestle with voltage dips, harmonics, and nuisance trips that disrupt production. This unit helps mitigate those risks with a robust dry-type DT-3 design and ventilated construction for reliable cooling. UL Listed certification supports safety compliance across industrial sites, while the 75 kVA rating and 208 V primary feeding 208Y/120 V secondary suit medium-size drive systems. The WS39 weather shield option can extend outdoor compatibility, and aluminum windings with a 914D frame simplify mounting in standard panels. Paired with Eaton's warranty, it translates to reduced downtime, predictable power quality, and easier maintenance for critical loads.
Product Information
Extended Description
MD75E83 Eaton: Drive Isolation Transformer, Ventilated, Dry Type Distribution, DT-3, Three-phase, PV: 208 delta, Taps: 1 at +5% FCAN, 1 at -5% FCBN, SV: 208Y/120V, 150°C, 75 kVA, Al windings, Frame: 914D, uses WS39
Product Name
Eaton Motor drive isolation ventilated transformer
Catalog Number
MD75E83
UPC
786680090738
Product Length/Depth
22 in
Product Height
39 in
Product Width
29 in
Product Weight
550 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
914D
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
208 V
Secondary Voltage
208Y/120 V
Temperature rise
150 °C rise
Volt ampere rating
75 kVA
Weathershield
WS39
Feature: Ventilated, dry-type DT-3 construction provides efficient cooling in harsh factory environments. Benefit: Enhances reliability and reduces heat-related losses, improving uptime for motor drives and control panels. Application: Ideal for 3-phase drive isolation in manufacturing lines where ventilation is a constraint. The DT-3 design supports robust operation in continuous-duty applications. Feature: 75 kVA rating with 208 V primary and 208Y/120 V secondary. Benefit: Delivers clean, regulated power to VFDs and distribution panels, minimizing flicker and voltage-induced trips. Application: Medium-size drive systems in 60 Hz environments, enabling consistent performance across loads. Feature: Tap changes at +5% FCAN and -5% FCBN. Benefit: Improves voltage regulation under supply fluctuations, reducing nuisance re-trips and extending drive life. Application: Facilities with variable line conditions or long cable runs to the drive panels. Feature: Aluminum windings and 914D frame. Benefit: Lightweight, durable construction with reliable mounting and thermal performance. Application: Fast installation in standard motor control centers and panels, with compatibility for retrofit projects. Feature: WS39 Weathershield option. Benefit: Extends outdoor or harsh-environment use without compromising insulation or performance. Application: Outdoor transformer installations or harsh plant environments requiring additional enclosure protection. Feature: UL Listed certification. Benefit: Clear safety compliance for industrial facilities, simplifying procurement and validation. Application: Global manufacturing sites requiring verified electrical safety standards. Warranty: Eaton’s standard coverage provides a defined window for performance assurance, supporting maintenance planning and total cost of ownership reduction.
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FAQs
Begin by mounting the 914D frame in a suitable enclosure or panel with adequate ventilation. Connect the primary to 208 V three-phase supply and the secondary to 208Y/120 V loads. Use the +5% and -5% taps as needed for voltage regulation. Ensure proper grounding, torque specs per Eaton guidelines, and verify clearance for WS39 enclosure if installed outdoors.
MD75E83 is a three-phase, 60 Hz transformer rated at 75 kVA. It uses a 208 V primary and provides 208Y/120 V secondary. It employs aluminum windings, features a DT-3 dry-type design, and comes in a 914D frame. Tap changes are available at +5% FCAN and -5% FCBN, with a 150 °C rise and WS39 protective option.
Yes, the MD75E83 supports outdoor or harsh environments when equipped with the WS39 Weathershield option. This ventilated dry-type transformer is designed for reliability in factory floors and outdoor installations, offering robust cooling and enclosure protection to maintain performance in challenging conditions.
The MD75E83 is UL Listed, confirming conformity with recognized safety standards for electrical equipment. This certification supports procurement in safety-conscious facilities and simplifies regulatory compliance during audits and inspections.
Routine checks should focus on insulation integrity, enclosure ventilation, and connection torque. With aluminum windings and a dry-type design, monitor ambient temperature and load conditions to prevent overheating. The unit’s warranty and UL certification provide assurance, while the 75 kVA rating supports predictable performance under peak drive loads, reducing unplanned downtime.