Eaton Z20N11E25CU Hazardous Transformer - Class I Div 2
Part Number: Z20N11E25CU
Quick Summary
Eaton Hazardous location encapsulated transformer powers critical equipment in Class I Division 2 environments. Plant engineers often struggle to meet hazardous-location codes while delivering reliable, efficient power in compact footprints. Key certifications include UL Listed, Class I Division 2 compliance, and a rugged NEMA 3R enclosure for indoor–outdoor service. With a 25 kVA rating, copper windings, and shielded construction, it delivers dependable voltage transformation for control panels, motors, and instrumentation, reducing downtime. Designed for flexible systems, it supports 120, 208, 240, and 277 V primaries with a 120/240 V secondary, enabling streamlined procurement and scalable electrical infrastructure.
Product Information
Extended Description
Z20N11E25CU Eaton: 25 kVA Class 1 Division 2 Transformer, 1PH, 240 X 480-120/240, shielded, Copper Windings, NEMA 3R Enclosure
Product Name
Eaton Hazardous location encapsulated transformer
Catalog Number
Z20N11E25CU
UPC
786680233074
Product Length/Depth
14.12 in
Product Height
18.06 in
Product Width
16.35 in
Product Weight
450 lb
Compliances
Class I, Div. 2, Groups A, B, C, D
Certifications
UL Listed
Type
Class 1 Division 2 Groups A, B, C and D, Hazardous Location Transformer
Coil material
Copper
Frequency rating
50/60 Hz
kVA
25 kVA
Phase
Single-phase
Primary voltage
120 V, 208 V, 240 V, 277 V
Secondary Voltage
120/240 V
Sound Level
NEMA ST-20
Temperature rise
115 °C rise
Area classification
Hazardous/Classified Locations
Design
EPZ
Enclosure
NEMA 3R
Frame
182H
Insulation
180 °C
Tap size
None
Volt ampere rating
25 kVA
Weathershield
Indoor-Outdoor
Wiring connection
90A
Encapsulated construction isolates windings from the environment, enhancing safety in hazardous locations. That isolation reduces ignition risk and provides a robust barrier against dust, moisture, and contaminants, delivering lower maintenance and longer service life. This makes it ideal for control panels and motor starters installed in chemical plants, oil refineries, and mining operations. Copper windings with a shielded design optimize thermal and electrical performance. That combination improves conductivity and heat dissipation, yielding lower copper losses and better efficiency under partial-load conditions. Use cases include distribution centers, machine controls, and process automation where steady voltage is critical. 25 kVA single-phase rating supports essential loads while keeping footprint compact. That sizing reduces voltage drop and enables safer, closer transformer placement to critical equipment, cutting wiring runs and labor costs. Suitable for panelboards and automation cabinets in manufacturing lines. NEMA 3R enclosure and indoor-outdoor availability provide weather resistance and installation flexibility. Install near loading docks, outdoor switchgear, or process skids where space is constrained. Broad primary and secondary voltage options support rapid system integration across facilities with varying supply voltages. Utilize this transformer in mixed-voltage facilities to minimize inventory and speed commissioning. UL Listed and Class I Division 2 compliance reduce procurement risk and streamline regulatory approvals. This design also aligns with standard Eaton accessories and service support for long-term reliability.
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FAQs
Installers should follow Class I Division 2 guidelines, ensuring proper clearance, enclosure integrity, and weatherproof mounting. The Z20N11E25CU uses a NEMA 3R enclosure suitable for indoor-outdoor use, so place it in a protected area when possible and verify grounding, conductor sizing, and protective equipment are in accordance with relevant NEC and local codes.
This unit is a 25 kVA, single-phase transformer with primary voltages of 120 V, 208 V, 240 V, and 277 V, and a secondary voltage of 120/240 V. It uses copper windings, operates at 50/60 Hz, and features a 115 °C temperature rise, shielded construction, and a NEMA 3R enclosure suited for hazardous and outdoor environments.
Yes, the Z20N11E25CU is UL Listed and certified for Class I, Division 2 hazardous locations (Groups A–D). It is designed with a NEMA 3R enclosure for indoor-outdoor use, aligning with industry standards for safe operation in potentially explosive environments and simplifying compliance during audits and procurement.
The 25 kVA rating supports essential loads with minimal voltage drop, while copper windings and shielded design improve efficiency and thermal performance. These features reduce energy losses and heat generation, enabling closer transformer placement to critical equipment in automation cabinets, process skids, and control panels, which translates to lower wiring costs and faster commissioning.
Expect low-maintenance operation thanks to encapsulated windings and robust outdoor-ready enclosure. UL Listing and Class I Division 2 compliance help with regulatory approvals, while the modular design and availability of Eaton accessories simplify routine inspections, torque checks, and component replacements, contributing to predictable lifecycle costs and minimized downtime.