Hammond Power DM020KK - Drive isolation transformer, three-phase, 20 kVA, 480–480 Volts, copper windings.
Hammond Power

DM020KK

UPC: 803423052065


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Overview

The Hammond Power DM020KK is a three-phase drive isolation transformer with a 20 kVA rating, designed for demanding industrial applications. It features a 480 Delta primary winding and a 480Y/277 Volt secondary winding, operating at 60 Hz. This transformer utilizes copper windings for efficient power transfer and reduced energy loss. HPS Drive Isolation Transformers are specifically engineered to meet the rugged demands of both AC and DC variable speed drives, providing essential voltage isolation and protection. The DM020KK offers a reliable solution for isolating sensitive drive electronics from line disturbances, harmonics, and voltage spikes, thereby extending equipment lifespan and minimizing downtime. Its robust construction ensures dependable operation in industrial settings. Key specifications include a 20 kVA capacity, three-phase operation, and a 480V primary to 480Y/277V secondary voltage configuration. This transformer is manufactured in the USA and is built to withstand the rigors of industrial environments. It is suitable for applications requiring clean, isolated power for motor drives, automation equipment, and other critical machinery.
  • The separate primary and secondary windings provide electrical isolation between the incoming line and the SCR load.
  • The windings are designed to withstand overcurrent of 150% of the rated load for 60 seconds or 200% of the rated load for 30 seconds.
  • Drive Isolation Transformers are sized to match standard motor horsepower and voltage ratings. Standard sizes range from 5 to 600 HP in six standard voltages.
  • Copper windings for efficient operation
  • Designed for AC and DC variable speed drives

Specifications

Enclosure Colour
ANSI 61 Grey, UL50
Frequency
60 Hz
Height
28.75 in
Height
730.25 mm
Length
25 in
Length
635 mm
Material
Copper
Mounting Method
Wall and Floor
Phase
3PH
Poles
3P
Primary Voltage
480 VAC
Secondary Voltage
480 V
Series
HPS Drive Isolation Transformers
Sound Level dBA
Meets NEMA ST-20 standards
Temperature Rise
150 °C
Transformer Rating
20kVA
Voltage Rating
480-480 VAC
Wall Mounting
Yes
Warranty
10 year warranty
Weight
240 L
Width
23.9 in
Width
607.06 mm
Winding
Aluminum
Package Dimensions (L x W x H)
23.9 IN x 25 IN x 28.75 IN
Package Dimensions (L x W x H)
607.06 mm x 635 mm x 730.25 mm
Package Weight (Imperial)
240.000 L
Package Weight (Metric)
108.000 kg
A - 15.0 kV bushing

015J0400AN

A - 15.0 kV bushing
O Plus C - 34.5 kV bushing

034Z3000AW

O Plus C - 34.5 kV bushing

How to Install the DM020KK Transformer

This guide provides step-by-step instructions for the safe installation and initial setup of the DM020KK transformer, ensuring proper connections and configurations.

Estimated time: 1h

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors, Grounding wire

  1. Inspect the transformer

    Immediately after receiving the transformer, inspect it for any transit damage and ensure it matches the shipping documents. Report any damages to the carrier.

  2. Mount the transformer

    Securely mount the transformer in an upright position on a suitable surface capable of supporting its weight. Use mounting screws and ensure it is level.

  3. Connect the grounding wire

    Connect the grounding wire to the main ground location on the transformer. Ensure the connection is tight and complies with local electrical codes.

  4. Make cable connections

    Connect the primary and secondary cables to the transformer terminals as per the nameplate diagram. Use terminal connectors and ensure all connections are clean and tight.

  5. Verify connections

    Before energizing, use a multimeter to verify that all connections are correct and that there are no short circuits. Ensure the transformer is properly grounded.

  6. Energize the transformer

    Once all connections are verified, energize the transformer. Monitor for any unusual sounds or overheating during initial operation.

  7. Perform initial calibration

    Check the output voltage with a multimeter to ensure it matches the nameplate specifications. Adjust tap settings if necessary.

Frequently Asked Questions about Hammond Power

What certifications and standards do Hammond Power products comply with?

Hammond Power products are certified to UL (Underwriters Laboratories) and CSA (Canadian Standards Association) standards in North America. Our products meet rigorous safety and performance requirements, with many items classified as UL Listed Products or Recognized Components. We also comply with international certifications including China Compulsory Certification (CCC), C-Tick for Australian EMC requirements, and ANCE for Mexico.

What is Hammond Power's warranty policy?

Hammond Power provides a standard one-year warranty on all products, covering defects in workmanship and materials. Products will be repaired or replaced free of charge if found defective upon factory inspection. The warranty does not cover damage from improper handling, incorrect application, or faulty installation.

What industries and applications are Hammond Power products used for?

Hammond Power products are engineered for critical industrial and commercial applications across multiple sectors, including petrochemical, mining, construction, renewable energy, e-mobility, power storage, and microgrids. Their comprehensive product range of dry-type transformers, power quality solutions, and magnetic components enables electrical distribution and electrification in diverse industrial environments worldwide.

What are the main product lines offered by Hammond Power?

Hammond Power Solutions offers a comprehensive range of dry-type and liquid-filled transformers for industrial and commercial applications. Their primary product lines include power transformers for renewable energy, e-mobility, data centers, microgrids, and industrial settings. The company provides both standard and custom-designed transformer solutions that are critical to electrical distribution networks across multiple industries.

What are the key features of Hammond Power products?

Hammond Power products feature advanced dry-type and liquid-filled transformers engineered for diverse industrial applications, with capabilities spanning renewable energy, e-mobility, data centers, microgrids, and industrial/commercial sectors. Key features include high-performance electrical steel laminations, windings available in copper or aluminum, advanced insulation systems (VPI or Cast Resin), Basic Impulse Level ranges from 10 kV to 250 kV, and custom design capabilities with over 3,000 unique transformer designs engineered annually.

What environmental ratings do Hammond Power products have?

Hammond Power offers industrial enclosures with comprehensive environmental ratings, including UL/cUL 508A ratings of Type 1, 2, 3, 4, 4X, 12, and 13. Their products meet IEC 60529 IP66 standards, providing robust protection against dust, water ingress, and harsh environmental conditions. Specific ratings vary by product series, with options ranging from indoor Type 1 enclosures to outdoor-rated Type 4X enclosures suitable for challenging industrial environments.

What technical support does Hammond Power offer?

Hammond Power Solutions provides comprehensive technical support through multiple channels. Customers can access technical resources via phone support in Canada, the United States, Mexico, and internationally, with toll-free numbers and regional contact points. Their technical team offers personalized assistance for custom design inquiries, helping customers find standard transformer and power solutions or develop specialized electrical products for various industrial applications.

What communication protocols do Hammond Power products support?

Hammond Power products support multiple industrial communication protocols, including Modbus RTU, PROFIBUS DP, PROFINET, EtherNet/IP, and CANopen. These protocols enable flexible connectivity across industrial automation platforms, supporting various network topologies and high-speed data transmission for comprehensive industrial control and monitoring applications.

What accessories are available for Hammond Power products?

Hammond Power offers a comprehensive range of accessories for industrial electrical components, including HME Series handles with key locking and padlocking options, door stop kits, light kit mounting brackets, and standard hardware like mounting screws and washers. These accessories are designed to enhance functionality and installation flexibility across their product lines.

How are Hammond Power products typically installed?

Hammond Power transformers are typically chassis-mounted using precise mounting hole centers and dimensions specific to each product series. Installation involves selecting the appropriate primary voltage configuration, securing the transformer to a mounting surface using the specified mounting holes, and connecting terminals according to the product's schematic. Most Hammond Power transformers feature multiple terminal options like solder or quick-connect terminals, allowing flexible and straightforward installation in industrial control and power distribution applications.