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Single-Phase Ventilated Transformer

General purpose ventilated transformers rated 25 KVA to 100 KVA for lighting, industrial and commercial applications. Can be used indoors or outdoors (with optional weathershields).

Manufacturer - Jefferson Electric
Model # - 421-series
Submitted By - Jefferson Electric (Manufacturer)
Country - United States
Category - Industrial : Power Supplies

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NEMA Tp-1 :   Yes, meets NEMA TP-1 Standards
Electrical Steel :   Cores of High-Quality Electrical Steel
Rated :   NEMA 1
Electorstatic Sheilds :   Optional
Windings :   Aluminum or Copper
Taps :   Provided on Primary
Insulation :   220ºC Insulation Class Standard
Temp Rise :   150ºC, 115ºC, and 80ºC temperature rise
Heat Cured :   ASA-61 gray powder coat finish



General Purpose: 25 KVA through 100 KVA


For all general loads, indoors or out, including lighting, industrial and commercial applications

Features, Functions, Benefits

Large connection compartment for ease of wiring and installation

Quiet operation for installation flexibility


Built in accordance with NEMA, ANSI, UL and CSA standards

*Options and Accessories

Other sizes, voltages and temperature rises available

CE Marked units available as custom

Wall brackets available for units up to 75 KVA with 150ºC temperature rise

NEMA 3R-rated enclosure with weathershields


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