DM145KD - Hammond Power Solutions 145 kVA 3-Phase Drive Isolation Transformer 480V Delta Primary 240Y/139V Wye Secondary NEMA 3R Enclosure

DM145KD

DM145KD is a three-phase drive isolation transformer from Hammond Power Solutions, engineered for demanding industrial applications. This transformer features a 480V delta primary with dual 5% taps and a 240Y/139V wye-n secondary, providing reliable voltage transformation for variable speed drives and other critical loads. Constructed with aluminum windings and a robust NEMA 3R enclosure, it offers durability and protection in harsh environments. The DM145KD is designed to withstand overcurrent of 150% of the rated load for 60 seconds or 200% of the rated load for 30 seconds, making it suitable for applications with high inrush or transient loads. The unit is encapsulated with electrical grade silica sand and resin compounds, sealing out moisture and contaminants. Standard copper leads provide secure connections, and the transformer meets UL and CSA short circuit withstand requirements.

• Part Number: DM145KD
• Manufacturer: Hammond Power Solutions
• Type: Drive Isolation Transformer
• Phase: 3-Phase
• Rating: 145 kVA
• Primary Voltage: 480V Delta
• Secondary Voltage: 240Y/139V Wye-n
• Enclosure: NEMA 3R
• Mounting: Floor Mount
• Conductor Material: Aluminum
• Short Circuit Withstand: Meets UL and CSA requirements
• Overcurrent Capability: 150% for 60 seconds or 200% for 30 seconds

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Specifications

• Part Number: DM145KD
• 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 : 240Y/139
• Secondary Connection : Wye-N
• Material : Aluminum
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 145
• 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 : 50 dBA (NEMA ST-20)
• Impedance (Std) : 3% - 6%
• Secondary Termination (NPL) : Mounting Pads
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : NH4-N3R
• Enclosure Dimensions : 41in/1042mm(H), 32in/813mm(W), 25.5in/648mm(D)
• Nameplate : Standard
• Standard kVA : 145
• 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 : 803423003913
• GTIN : 00803423003913
• Weight : 900
• Certification : CSA, UL

Documentation and Resources

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