Hammond Power SFK3 - Control Transformer Accessories - Secondary Fuse Kit 3
Hammond Power

SFK3

UPC: 803423077686

Documents & Media
BrochureTechnical DrawingSpecification Sheet

Contact for Pricing

Overview

The Hammond Power SFK3 Secondary Fuse Kit (SKU: SFK3) is designed to provide essential overcurrent protection for HPS control transformers. This kit includes components necessary for implementing secondary fuse protection, ensuring the safe operation of your control systems. Standard secondary fuse kits, like the SFK3, are typically supplied with 13/32” x 1 1/2” midget/type CC fuse clips, mounting screws, and primary/secondary voltage links. These kits are crucial for safeguarding transformer windings from excessive current, which can be caused by short circuits or overloads. Proper fuse selection, guided by the transformer's current rating and relevant electrical codes (CSA, UL), is paramount. The catalog indicates that the overcurrent protection listed is generally 125% of the rated current, with recommendations to choose the next higher standard fuse rating if exact matches are unavailable. For transformers with primary current less than 2 amps, a different protection strategy (300% rating) may apply, also requiring selection of the next higher standard fuse. The SFK3 is manufactured in the USA, adhering to stringent quality standards. This accessory is vital for maintaining the longevity and reliability of your HPS control transformer installations, preventing damage and downtime.
  • Provides essential secondary overcurrent protection for HPS control transformers.
  • Includes 13/32” x 1 1/2” midget/type CC fuse clips.
  • Comes with fuse clip mounting screws and primary/secondary voltage links.
  • Designed to safeguard transformer windings from damage due to overloads or short circuits.
  • Manufactured in the USA by Hammond Power.

Specifications

Amperage Rating
30 Amp Max.
Application
Add fuse mounting options.
Class
CC, Midget
Color
Metallic
Connection
Snap On
Material
Steel
Mounting
Terminal Block
Operating Temperature
40 Deg C
Phase
1
Special Features
Fuse Holder options
Standard
Not Applicable
Type
Accessories > Fuse Kit or Fuse Holders
Voltage Rating
600 Volt maximum
Wattage
Not Applicable
Control Transformer Accessories - Secondary Fuse Kit 1

SFK1

Control Transformer Accessories - Secondary Fuse Kit 1
Control Transformer Accessories - Fuse Kit, Dual Midget Pri

FK-12

Control Transformer Accessories - Fuse Kit, Dual Midget Pri
Control Transformer Accessories - Finger Guards, 50 to 350 VA, AR, QR, PR, KHR, SR Suffixes

SPFG1

Control Transformer Accessories - Finger Guards, 50 to 350 VA, AR, QR, PR, KHR, SR Suffixes
Control Transformer Accessories - Fuse Kit, 250 V, 1.0A

EC1

Control Transformer Accessories - Fuse Kit, 250 V, 1.0A
Control Transformer Accessories - Fuse Kit, 2REJ Pri, 1Midget Sec

FK-14

Control Transformer Accessories - Fuse Kit, 2REJ Pri, 1Midget Sec
Control Transformer Accessories - Secondary Fuse Kit 2

SFK2

Control Transformer Accessories - Secondary Fuse Kit 2
Control Transformer Accessories - Secondary Fuse Kit 7

SFK7

Control Transformer Accessories - Secondary Fuse Kit 7
Control Transformer Accessories - Fuse Kit, 250 V, 1.6A

EC1X6

Control Transformer Accessories - Fuse Kit, 250 V, 1.6A
Control Transformer Accessories - Fuse Kit, Dual Rej Pri

FK-11

Control Transformer Accessories - Fuse Kit, Dual Rej Pri
Control Transformer Accessories - Secondary Fuse Kit 6

SFK6

Control Transformer Accessories - Secondary Fuse Kit 6
Control Transformer Accessories - Secondary Fuse Kit 4

SFK4

Control Transformer Accessories - Secondary Fuse Kit 4
Control Transformer Accessories - Fuse Kit, 250 V, 1.25A

EC1X25

Control Transformer Accessories - Fuse Kit, 250 V, 1.25A

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.