Hammond Power Solutions DM550BK - 550 kVA Transformer (208D-480Y/277V)

DM550BK

Hammond Power Solutions DM550BK is a three-phase general duty transformer designed for industrial power distribution applications. This 550 kVA unit features a 208V delta primary connection and 480Y/277V wye secondary configuration, operating at 60Hz frequency 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 59" H × 48.5" W × 38" D, and produces a maximum sound level of 62 dBA. It complies with IBC 2018 seismic standards (Sds=2.0, z/h=0, lp=1.5) and carries approvals for installation in both US and LATAM markets. Typical applications include industrial plants, commercial facilities, and utility distribution systems requiring reliable power transformation. Key Features & Specifications

• Type: Three-Phase General Duty Transformer
• Voltage: 208V Delta Primary / 480Y/277V Secondary
• Current: 550 kVA Capacity
• Frequency: 60Hz
• Material: Aluminum Windings
• Temperature Rise: 150°C
• Insulation Class: 220°C
• Impedance: 4.5% - 7% Standard
• Enclosure: Type 3R / IP24, ANSI 61 Grey
• Dimensions: 59" H × 48.5" W × 38" D
• Sound Level: 62 dBA (NEMA ST-20)
• Seismic Compliance: IBC 2018 (Sds=2.0)
• Vector Configuration: YNd1 (-30°)

Specifications

• Part Number: DM550BK
• Manufacturer : Hammond Power Solutions
• Brand : Hammond Power Solutions
• Category : Transformer
• Phase : 3
• Enclosure Grade : Standard
• Duty : General Duty
• Frequency : 60Hz
• Primary Voltage : 208D
• Primary Connection : Delta
• Primary FCAN (NPL) : 1x5.5%
• Primary FCBN (NPL) : 1x5.5%
• Secondary Voltage : 480Y/277
• Secondary Connection : Wye-N
• Material : Aluminum
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 550
• 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 : 62 dBA (NEMA ST-20)
• Impedance (Std) : 4.5% - 7%
• Secondary Termination (NPL) : Mounting Pads
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : NJ2-N3R
• Enclosure Dimensions : 59in/1499mm(H), 48.5in/1232mm(W), 38in/966mm(D)
• Nameplate : Standard
• Standard kVA : 550
• Vector Configuration : YNd1 (-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 : 803423052928
• GTIN : 00803423052928
• Weight : 2850
• Certification : CSA, UL

Documentation and Resources

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