SK3A0225KK9K - Hammond Power Solutions 225 kVA 3-Phase Sentinel-K K9 Transformer 480D-480Y/277V 60Hz 150C 3R

SK3A0225KK9K

SK3A0225KK9K is a 225 kVA, 3-phase Sentinel-K K9 general purpose distribution transformer from Hammond Power Solutions designed for reliable power distribution at 480D-480Y/277 volts and 60 Hz frequency.

This transformer features copper windings with electrostatic shielding (K9 designation), a 150°C temperature rise insulation system, and a rugged Type 3R enclosure suitable for outdoor use. It is engineered for energy-efficient operation in commercial and industrial applications, providing stable voltage transformation and durability under demanding conditions. The unit supports 600 volts and below systems and includes front-accessible terminals for easy installation and maintenance.

• 225 kVA power rating
• 3-phase configuration
• Primary voltage: 480 Delta
• Secondary voltage: 480Y/277 Volts
• Frequency: 60 Hz
• Copper windings with electrostatic shield (K9)
• 150°C temperature rise insulation class
• Type 3R heavy duty ventilated enclosure
• UL Listed and CSA Certified
• Designed for general purpose distribution
• Suitable for outdoor installation

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Specifications

• Part Number: SK3A0225KK9K
• 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
• Secondary Voltage : 480Y/277
• Secondary Connection : Wye-N
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 258.015
• Efficiency Regulation : DOE 2016 (US), NRCAN 2019 (Canada), NMX 2021 (Mexico)
• Seismic Compliance : IBC 2018 (Sds=2.0, z/h=1, lp=1.5)
• Sound Level : 55 dBA (NEMA ST-20)
• Impedance (Std) : 3.5% - 7%
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure Dimensions : 44.5in/1131mm(H), 31.5in/801mm(W), 29.5in/750mm(D)
• Electrostatic Shield : Single
• Nameplate : Standard
• Standard kVA : 225
• Vector Configuration : Dyn1 (-30°)
• Seismic Standard Value : IBC 2018
• OSHPD : No
• Seismic IP : lp=1.5
• Seismic ZH : z/h=1
• Seismic SDS Value : Sds=2.0
• Enclosure IR Window : No
• Primary FCAN (Std) : 2x2.5%
• Primary Termination (Std) : Mounting Pads

Product Data

• UPC : 803423129941
• Weight : 1600
• Certification : CSA, UL

Documentation and Resources

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