DM051KK - Hammond Power Solutions 51kVA 480D-480Y 3-Phase Drive Isolation Transformer

DM051KK

DM051KK is a three-phase drive isolation transformer rated at 51 kVA with 480 delta primary and 480Y secondary voltage, designed for variable speed drive applications requiring electrical isolation between incoming line and SCR load. This transformer features separate primary and secondary windings that provide robust isolation, aluminum wound construction with high-grade silicon steel laminations, and is housed in an NH6-N3R indoor/outdoor enclosure suitable for floor or wall mounting. The unit is engineered to withstand overcurrent conditions of 150% rated load for 60 seconds or 200% rated load for 30 seconds, includes a coil-mounted thermal warning switch, and incorporates ST-20 compliant taps with neutral terminal for field connection on applicable units.

• Power Rating: 51 kVA
• Phase: 3-Phase
• Primary Voltage: 480V Delta
• Secondary Voltage: 480Y/277V
• Frequency: 60 Hz
• Insulation System: 220 degrees C (150 degrees C rise)
• Enclosure Type: NH6-N3R Indoor/Outdoor
• Mounting: Floor or Wall
• Conductor Material: Aluminum wound
• Dimensions: 25 in L x 23.9 in W x 28.75 in H
• Weight: Approximately 430 lbs
• Finish: ANSI 61 UL 50 gray enclosure

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Specifications

• Part Number: DM051KK
• 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 : 480Y/277
• Secondary Connection : Wye-N
• Material : Aluminum
• Temperature Rise : 150°C
• Insulation Class : 220°C
• EKVA : 51
• 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) : Mechanical Lugs
• Enclosure Type : Type 3R / IP24
• Enclosure Finish : ANSI 61 Grey, UL50
• Enclosure PN (NPL) : NH6-N3R
• Enclosure Dimensions : 28.75in/731mm(H), 23.9in/608mm(W), 25in/635mm(D)
• Nameplate : Standard
• Standard kVA : 51
• 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 : 803423052300
• GTIN : 00803423052300
• Weight : 415
• Certification : CSA, UL

Documentation and Resources

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