Hammond Power Solutions SK3A0300KK4S - 3-Phase Transformer 300kVA 480D-480Y/277V

SK3A0300KK4S

Hammond Power Solutions SK3A0300KK4S is a three-phase general duty transformer designed for industrial power distribution applications. This 300 kVA unit features a 480V delta primary and 480Y/277V wye secondary configuration with aluminum windings rated for 150°C temperature rise and 220°C insulation class. The transformer is housed in a Type 3R/IP24 enclosure measuring 52"H x 37.5"W x 34"D with ANSI 61 grey finish, providing robust protection against weather conditions. It complies with DOE 2016, NRCAN 2019, and NMX 2021 efficiency regulations while meeting IBC 2018 seismic standards with Sds=2.0 rating. Typical applications include industrial facilities, commercial buildings, and institutional power systems requiring reliable 480V distribution with 277V lighting capability. Key Features & Specifications

• Type: Three-Phase General Duty Transformer
• Primary Voltage: 480V Delta
• Secondary Voltage: 480Y/277V Wye
• Standard kVA: 300
• Frequency: 60Hz
• Material: Aluminum Windings
• Temperature Rise: 150°C
• Insulation Class: 220°C
• Impedance: 4% - 7.5%
• Enclosure Type: Type 3R / IP24
• Enclosure Dimensions: 52"H x 37.5"W x 34"D
• Sound Level: 55 dBA
• Efficiency Compliance: DOE 2016, NRCAN 2019, NMX 2021
• Seismic Standard: IBC 2018 (Sds=2.0)

Specifications

• Part Number: SK3A0300KK4S
• 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) : 2x2.5%
• Primary FCBN (NPL) : 4x2.5%
• Secondary Voltage : 480Y/277
• Secondary Connection : Wye-N
• Material : Aluminum
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 325.883
• Efficiency Regulation : DOE 2016 (US), NRCAN 2019 (Canada), NMX 2021 (Mexico)
• Seismic Compliance : IBC 2018 (Sds=2.0, z/h=0, lp=1.5)
• Sound Level : 55 dBA (NEMA ST-20)
• Impedance (Std) : 4% - 7.5%
• Secondary Termination (NPL) : Mounting Pads
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : DH5-N3R
• Enclosure Dimensions : 52in/1321mm(H), 37.5in/953mm(W), 34in/864mm(D)
• Electrostatic Shield : Single
• Nameplate : Standard
• Standard kVA : 300
• 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 : 803423128968
• Weight : 2000
• Certification : CSA, UL

Documentation and Resources

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