Eaton MD51E92ZZ Open Core-Coil Transformer - UL Recognized
Part Number: MD51E92ZZ
Quick Summary
Eaton MD51E92ZZ Open Core-Coil Transformer provides isolation and voltage conversion for three-phase power systems. Engineers rely on robust, ventilated dry-type transformers to feed drives and distribution panels without compromising safety or efficiency. However, heat buildup, downtime, and escalating maintenance costs challenge reliability in busy facilities. The UL Recognized certification reinforces safety and consistent performance in demanding environments, aligning with Eaton’s DT-3 design and the 914S frame. This solution delivers business value through predictable voltage regulation, a compact form factor, and straightforward installation in open-frame configurations. By combining rugged construction with thoughtful taps and cooling, it supports longer asset life, easier service, and more dependable power distribution across industrial sites.
Product Information
Extended Description
MD51E92ZZ 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, 51 kVA, Al windings, Frame: 914S
Product Name
Eaton Open core-coil ventilated transformer
Catalog Number
MD51E92ZZ
UPC
786680053214
Product Length/Depth
19.12 in
Product Height
39.18 in
Product Width
26.12 in
Product Weight
463.5 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 Recognized
Catalog Notes
Open type core and coil assembly
Coil material
Aluminum
Design
DT-3
Frame
914S
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
51 kVA
Feature → Business Impact → Application: The open-core, ventilated DT-3 design elevates cooling efficiency and enables easier visual inspection, reducing thermal stress and unplanned downtime in crowded switchgear rooms. This translates to higher line availability for critical manufacturing lines and data-center-like control panels in industrial facilities. Feature → Business Impact → Application: A 51 kVA, three-phase, 60 Hz configuration with 460 V primary and 460Y/266 V secondary delivers scalable power distribution while maintaining tight regulation; the +5% and -5% taps provide quick compensation for supply fluctuations, minimizing equipment mis-voltages in motor drives and controls. Feature → Business Impact → Application: Aluminum windings with a sturdy 914S frame deliver durable, lightweight performance and efficient heat transfer, supporting easier handling during installation and long-term reliability in harsh environments. Feature → Business Impact → Application: Drive isolation functionality reduces electrical noise and transients reaching sensitive drives and PLCs, improving control accuracy and reducing nuisance trips in automated lines. Feature → Business Impact → Application: UL Recognized certification and Eaton’s warranty program underpin risk management for OEMs and end users, easing procurement and service planning for open-frame installations in distribution panels. Feature → Business Impact → Application: Open-type core and coil assembly simplifies retrofit projects and routine maintenance, enabling faster inspections and replacements in retrofit or new-build motor control centers.
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FAQs
For proper installation, ensure adequate ventilation around the open-core design and provide a space for routine visual inspection. Mounting should align with the 914S frame specifications, with secure supports in a ventilated area away from excessive dust or moisture. Use appropriate enclosure if mounting inside panels to preserve open-core accessibility while protecting components.
The transformer is a three-phase, 60 Hz device rated at 51 kVA with a 460 V primary and a 460Y/266 V secondary. It includes taps at +5% FCAN and -5% FCBN to accommodate voltage variations. The design features aluminum windings, a 914S frame, and a 150 °C temperature rise, suitable for industrial drive isolation needs.
Yes, the MD51E92ZZ carries UL Recognized certification, signaling compliance with established safety and reliability standards for electrical equipment. This helps streamline procurement, regulatory alignment, and supplier qualification for industrial installations and OEM integrations requiring certified power distribution components.
This transformer is well-suited for motor drive systems, control panels, and distribution enclosures where drive isolation, voltage regulation, and phase balance are critical. Its ventilated dry-type construction and DT-3 design support reliable performance in manufacturing floors, processing lines, and automation cells with demanding duty cycles.
The product carries Eaton’s warranty policy of one year from installation or eighteen months from shipment, whichever occurs first. Routine maintenance should focus on maintaining ventilation, inspecting connections and taps, and keeping the open-core area accessible for periodic checks and cleaning in dusty environments to preserve cooling efficiency.