DM660BK - Hammond Power Solutions 660 kVA 3-Phase Drive Isolation Transformer 208D/480Y 60 Hz Floor Mount

DM660BK

DM660BK is a three-phase drive isolation transformer designed for demanding industrial applications. This unit provides reliable voltage transformation for variable speed drives and other heavy-duty equipment, featuring robust construction and high-performance insulation. The DM660BK offers a 660 kVA rating with a 208 delta primary and 480Y secondary configuration, operating at 60 Hz. It is built with a floor-mount design for secure installation and includes a 220°C insulation system with a 150°C temperature rise. The transformer is suitable for use with both AC and DC variable speed drives, providing isolation and voltage regulation for optimal performance.

• 660 kVA three-phase rating
• 208 delta primary voltage
• 480Y secondary voltage
• 60 Hz frequency
• Floor mounting type
• 220°C insulation class (150°C rise)
• UL Listed
• CSA Certified
• Drive isolation transformer
• Robust industrial construction
• Designed for variable speed drives
• Meets North American efficiency standards

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Specifications

• Part Number: DM660BK
• 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 : 660
• 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) : 5.5% - 7.5%
• Secondary Termination (NPL) : Mounting Pads
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : NJ3-N3R
• Enclosure Dimensions : 66in/1677mm(H), 51.5in/1309mm(W), 43in/1093mm(D)
• Nameplate : Standard
• Standard kVA : 660
• 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 : 803423052980
• Weight : 3500
• Certification : CSA, UL

Documentation and Resources

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