Hammond Power Solutions DM020KK - Three-Phase Transformer 20kVA 480D-480Y/277V

DM020KK

Hammond Power Solutions DM020KK is a three-phase general duty transformer designed for industrial power distribution applications. This 20 kVA unit features a 480V delta primary to 480Y/277V secondary configuration with 60Hz frequency and 3-6% impedance, constructed with aluminum windings rated for 150°C temperature rise and 220°C insulation class. The transformer is housed in a Type 3R/IP24 enclosure with ANSI 61 grey finish, measuring 28.75" H × 23.9" W × 25" D, and operates at 45 dBA sound levels. It complies with IBC 2018 seismic standards (Sds=2.0, z/h=0, lp=1.5) and is approved for installation in US and LATAM markets. Typical applications include commercial buildings, industrial facilities, and electrical distribution systems requiring reliable voltage transformation. Key Features & Specifications

• Type: Three-Phase General Duty Transformer
• Primary Voltage: 480V Delta
• Secondary Voltage: 480Y/277V Wye-N
• kVA Rating: 20
• Frequency: 60Hz
• Impedance: 3-6%
• Material: Aluminum Windings
• Temperature Rise: 150°C
• Insulation Class: 220°C
• Enclosure: Type 3R/IP24
• Dimensions: 28.75" H × 23.9" W × 25" D
• Sound Level: 45 dBA
• Seismic Compliance: IBC 2018

Specifications

• Part Number: DM020KK
• Manufacturer : Hammond Power Solutions
• Brand : Hammond Power Solutions
• Category : Transformer
• Phase : 3
• Enclosure Grade : Standard
• Duty : General Duty
• Frequency : 60Hz
• Primary Voltage : 480D
• Primary Connection : Delta
• Primary FCAN (NPL) : 1x5%
• Primary FCBN (NPL) : 1x5%
• Secondary Voltage : 480Y/277
• Secondary Connection : Wye-N
• Material : Aluminum
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 20
• Efficiency Regulation : No Efficiency Specification; approved for installation in US and LATAM
• Seismic Compliance : IBC 2018 (Sds=2.0, z/h=0, lp=1.5)
• Sound Level : 45 dBA (NEMA ST-20)
• Impedance (Std) : 3% - 6%
• Secondary Termination (NPL) : Mechanical Lugs
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : NH6-N3R
• Enclosure Dimensions : 28.75in/731mm(H), 23.9in/608mm(W), 25in/635mm(D)
• Nameplate : Standard
• Standard kVA : 20
• Vector Configuration : Dyn1 (-30°)
• Seismic Standard Value : IBC 2018
• OSHPD : No
• Seismic IP : lp=1.5
• Seismic ZH : z/h=0
• Seismic SDS Value : Sds=2.0
• Enclosure IR Window : No

Product Data

• UPC : 803423052065
• Weight : 285
• Certification : CSA, UL

Documentation and Resources

• Engineering Drawing (PDF)
• Brochure
• Hammond Product Application Videos
• Frequently Asked Questions
• Troubleshooting Guide
• Enclosure CAD Drawing (PDF)