Hammond Power DM330KDC - Drive isolation transformer (DIT), three-phase, 330 kVA, 480–240 Volts, copper windings.
Hammond Power

DM330KDC

UPC: 803423004408


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Overview

The Hammond Power DM330KDC is a three-phase drive isolation transformer (DIT) with a substantial 330 kVA rating. Engineered for reliability and performance, this transformer is designed to meet the rigorous demands of AC and DC variable speed drives while providing essential voltage transformation. It features robust copper windings for efficient power transfer and durability. The primary voltage is 480V (Delta configuration, denoted as 480D PV), and the secondary voltage is 240V (Wye configuration, denoted as 240Y SV). This configuration is ideal for applications requiring a step-down from a 480V supply to a 240V system for motor control. The 600V class rating indicates its suitability for industrial environments. Manufactured in the USA, the DM330KDC (SKU: DM330KDC) offers a dependable solution for isolating sensitive drive systems from power line disturbances and providing the correct operating voltage. Its construction with copper windings ensures lower losses and extended operational life compared to aluminum alternatives. This transformer is a critical component for ensuring the stable and efficient operation of variable frequency drives (VFDs) and other motor control systems in industrial settings.
  • 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.
  • Features durable copper windings
  • Manufactured in the USA

Specifications

Application
Variable Speed Drives.
Cooling
Convection cooled
Enclosure
Indoor/outdoor
Enclosure Colour
ANSI 61 Grey, UL50
Frequency
60 Hz
Frequency Rating
60 HZ
Height
51.5 in
KVA Rating
330 kVA
Length
34 in
Material
Copper
Mounting
Floor Mount
Mounting Method
Floor
Number Of Phases
3
Number Of Taps
ST-20 compliant
Phase
3PH
Primary Voltage
480 V
Secondary Voltage
240Y V
Secondary Voltage
480 V
Series
DM
Sound Level dBA
Meets NEMA ST-20 standards
Special Features
Designed to withstand overcurrent of 150% of the rated load for 60 seconds or 200% of the rated load for 30 seconds. Comes standard in an indoor/outdoor enclosure with a coil mounted thermal warning switch.
Standard
CSA, UL
Temperature Rating
Typical 30 Average/ 40 Maximum Deg C
Temperature Rise
115 Deg C
Transformer Rating
330kVA
Type
Transformers > Drive Isolation
Voltage Rating
480-240 V
Wall Mounting
No
Warranty
10 year warranty
Weight
32 lbs./100ft
Width
39.5 in
Winding
Copper
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

Frequently Asked Questions

What voltage configurations are available for this transformer?

Standard voltage configurations include 208 Delta to 480Y, 230 Delta to 230Y, 460 Delta to 230Y, 460 Delta to 400Y, 460 Delta to 460Y, 480 Delta to 240Y, 480 Delta to 480Y, 575 Delta to 460Y, and 575 Delta to 575Y at 60 Hz.

What is the temperature rise and insulation system?

The transformer uses a 220°C insulation system with a typical 150°C temperature rise. Optional 115°C and 80°C rise configurations are also available.

What enclosure types are available?

The standard enclosure is a heavy-duty ventilated Type 3R, suitable for indoor or outdoor applications. Optional enclosure types include Type 4, 4X (stainless steel), and Type 12.

What mounting options are available?

The transformer supports floor mounting for all units, and wall and ceiling mounting for units up to 750 lbs. Specific mounting type is indicated in the selection tables as 'F' for floor or 'W' for wall mounting.

What conductor materials are used?

The transformer can be wound with either copper or aluminum conductors, which are precision wound and electrically balanced to minimize axial forces during short-circuit conditions.

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.