Fuses
Fuses
Eaton Corporation is a global leader in power distribution and related technologies, focusing on reliability, efficiency, and safety in power systems.
This document is Volume 14 of Eaton's catalog series, focusing on fuses, including expulsion and current limiting types, and is part of a comprehensive library of 14 volumes.
- Product Overview: Eaton's medium voltage fuses, with a legacy from Westinghouse Electric, meet IEEE standards and are categorized into power and distribution classes.
- Voltage Classification: Fuses are classified as low, medium, and high voltage according to ANSI standards.
- Fuse Types: Includes expulsion fuses and current limiting fuses.
- Backup Fuses: Used in series with other devices to interrupt currents.
- General Purpose Fuses: Interrupt currents causing element melting in no less than one hour.
- Full Range Fuses: Interrupt all currents from rated interrupting current down to minimum continuous current.
- Fuse Refill Unit: A replaceable assembly containing the current-responsive element.
- Fuse Holder: A reusable holder that forms a complete fuse unit with a refill unit.
Eaton products comply with various standards but are not intended for nuclear applications without further certification. Installation should adhere to the U.S. National Electrical Code.
Further information is available on Eaton's website and other technical publications.
The document describes key components of a fuse system, including the spring and shunt assembly, fuse unit, and exhaust control device.
Different mounting types are discussed, such as non-disconnect, disconnect, and dropout mountings.
Expulsion fuses use boric acid as the interrupting medium, with RBA and RDB types discussed.
Refillable fuses allow the consumable refill unit to be replaced, offering high interrupting capacity.
Ensuring the integrity of weather seals is crucial for outdoor applications.
The document emphasizes the importance of selecting the appropriate fuse type and mounting for specific applications.
Used in indoor fuses to moderate pressure waves and noise.
Involves four key factors: rated maximum voltage, rated maximum interrupting current, rated continuous current, and coordination with protective equipment.
The fuse must have a rated maximum voltage equal to or greater than the maximum power frequency voltage it could encounter.
The maximum symmetrical fault current a fuse can handle.
When a fuse interrupts a fault, the voltage across its terminals changes rapidly.
Eaton's fuses are designed to carry rated current continuously without exceeding temperature limits.
At altitudes above 1000 meters, the dielectric strength of air decreases, requiring de-rating of fuses.
Eaton's expulsion fuses should not be paralleled to increase current ratings beyond specified limits.
Outlines the specifications for expulsion fuses, emphasizing the importance of selecting fuses that meet voltage, interrupting, and continuous current ratings.
Guidance on fuse selection and coordination, stressing the need to maintain a safety zone.
References several standards, including IEEE Std. C37.46™ and ANSI C37.42-1996.
Recommends using a 10% safety zone for coordination.
Discusses the application of expulsion fuses in transformer protection.
Includes tables and illustrations that provide minimum clearance requirements and suggested minimum fuse sizes for transformer applications.
Discusses the coordination of fuses for transformer protection.
For capacitor banks, a fuse rating to full load current ratio of 1.65:1 is recommended.
Explains the performance of fuses under repetitive faults.
BA type fuses are described as refillable, high voltage expulsion fuses.
Includes detailed specifications for BA type fuses.
Lists various expulsion fuses with their voltage ratings, ampere ratings, catalog numbers, and approximate shipping weights.
Describes the DBA type fuse as a dropout, boric acid high voltage expulsion fuse.
Instructions for installing DBA type fuse units are provided.
The DBA fuses are suitable for protecting power transformers, feeder circuits, and distribution transformers.
Explains the fast circuit-interrupting capability of the boric acid power fuse.
Outlines the dimensions for DBA type fuses across various voltage ratings.
Instructions for spacer adjustment and switch stick operation are provided.
Lists the interrupting ratings for DBA-1 and DBA-2 fuse units.
Detailed tables are provided for selecting the appropriate DBA-1 and DBA-2 fuse units.
Introduces DBU type fuses, designed for both indoor and outdoor applications.
DBU fuses are designed for fault interruption within fuse holders.
The DBU fuse consists of a fuse unit, end fittings, and a mounting.
DBU fuses utilize boric acid for de-ionizing action to interrupt fault currents.
DBU fuses are suitable for systems up to 34,500V.
End fittings are reusable and interchangeable with industry standards.
Eaton offers mountings for DBU fuses in 17 kV, 27 kV, and 38 kV classes.
DBU fuses effectively protect circuits from 2400V to 34,500V.
This document provides detailed specifications and information on DBU and RBA/RDB type expulsion fuses.
Lists voltage performance curves for DBU type fuses.
These are slow E expulsion fuse units designed for both indoor and outdoor applications.
Outlines the different mounting options for DBU fuses.
Designed for indoor and outdoor applications, offering renewable options.
RBA/RDB fuses are used in load interrupter switchgear, power transformers, high voltage capacitors, and pad-mounted transformers.
Describes the components of renewable boric acid expulsion type fuses.
References specific installation instructions and emphasizes the ease of installation and maintenance of RBA fuses.
The RBA refill unit consists of a calibrated current-responsive fuse element.
During a fault, the fuse and strain elements melt, and the arcing rods pull the arc through the boric acid liner.
For low current faults, the main and auxiliary arcing rods draw through the boric acid liner.
RBA fuse refills are ANSI/IEEE “E” rated.
The RBA fuse holder is designed for indoor use, while the RDB holder is suitable for outdoor applications.
This assembly includes a stainless steel spring and a flexible copper shunt.
High conductivity copper alloy contacts ensure low resistance connections.
For indoor applications, exhaust control devices like condensers and discharge filters minimize noise and exhaust.
RBA and RDB fuses operate under normal loading, overloading, and fault conditions.
The document provides technical specifications and guidelines for RBA and RDB type expulsion fuses.
The RBA and RDB power fuses are designed to operate at specific maximum voltage levels.
Outlines the importance of using exhaust control devices in indoor applications.
Includes tables detailing the interrupting ratings for various fuse types and configurations.
Detailed tables provide catalog numbers for different fuse types.
It is recommended that the rated continuous current of a fuse should at least equal or exceed the maximum load current.
This document provides detailed specifications and configurations for various types of expulsion fuses.
Lists various fuse models with their respective voltage ratings, ampere ratings, and catalog numbers.
Details the types of fuse holders available.
Information on exhaust control devices, such as condensers and filters, is provided.
Approximate dimensions for RBA and RDB fuse mountings are given.
The tables in the document provide a comprehensive list of fuse configurations.
The document emphasizes the importance of selecting the correct fuse type and configuration.
The document provides detailed information on Eaton's current-limiting fuses.
Eaton's current-limiting fuses are designed to produce arc voltages within the limits specified by C37 standards.
These fuses are suitable for a wide range of interrupting ratings.
Eaton's fuses are compatible with industry-standard mounting sizes.
The selection of a current-limiting fuse involves four major considerations.
The fuse's voltage rating must be equal to or greater than the maximum power frequency voltage of the system.
This rating indicates the maximum current the fuse can interrupt under specified conditions.
Eaton's fuses are rated to carry their specified current continuously without exceeding temperature rise limits.
Eaton's current-limiting fuses are versatile and reliable components for protecting electrical systems.
Current-limiting fuses have a low thermal capacity and cannot handle overloads like transformers and motors.
Fuses are often mounted in enclosures, which can elevate ambient temperatures.
To achieve higher continuous current ratings, fuses can be paralleled.
Proper coordination involves ensuring the fuse's melting and clearing performance aligns with other circuit components.
Time-current curves are based on standard conditions.
Fuses with the same ratings from different manufacturers may not be interchangeable.
Different types of current-limiting fuses are used based on application needs.
Current-limiting fuses limit fault current and energy.
Current-limiting fuses generate arc voltages that can affect lightning arresters.
The document provides detailed technical guidance on the application and selection of current-limiting fuses for transformer protection.
Current-limiting fuses are designed to protect transformers by isolating faults.
Outlines the criteria for selecting the appropriate fuse rating.
References IEEE/ANSI standards for transformer protection.
It is recommended to use E-rated current-limiting fuses at the primary terminals of transformers.
Includes tables and curves that provide guidance on fuse selection.
Highlights the trade-offs between allowing transformer overloads and ensuring adequate protection.
Discusses the use of secondary breakers in coordination diagrams.
Fuses at the terminals of delta-delta transformers require time-current and heating curves.
The vertical distance between the total clearing curve and the safe heat curve in coordination diagrams indicates the protection margin.
Outlines the application of current limiting fuses for self-cooled power transformers.
Medium voltage motor starters use overload relays, contactors, and back-up current-limiting fuses for overcurrent protection.
Discusses the performance of fuses under repetitive faults.
The document provides detailed technical information on current limiting fuses.
Outlines the specifications for different fuse types.
Discusses the coordination between reclosing circuit breakers and fuses.
Helix type fuses are suitable for a wide range of applications.
Helix type fuses offer several advantages.
Provides information on mounting options for different fuse types.
Provides guidelines for selecting the appropriate fuse.
Includes several tables with detailed data on fuse ratings.
The document provides detailed specifications and selection guidelines for Eaton's CLPT and NCLPT type current limiting fuses.
The fuses are available with current ratings from 0.5E to 10E and voltage ratings from 2.4 kV to 34.5 kV.
Key features include quiet and safe operation.
CLPT fuses are constructed similarly to other Eaton current limiting fuses.
To select the appropriate fuse, consider the voltage rating, current rating, interrupting rating, and mounting method.
These fuses are used with potential and control power transformers.
Includes extensive tables detailing catalog numbers, dimensions, performance curves, and mounting options.
This document provides detailed specifications and mounting information for Eaton's current limiting fuses.
Outlines various types of current limiting fuses with maximum voltage ratings of 25.5 kV and 38.0 kV.
Provides comprehensive mounting details for both disconnect and non-disconnect types.
Highlighted for their use in medium voltage motor starters.
Notes that certain CLS and ACLS fuses are UL recognized.
CLS fuses are designed to withstand severe duty cycles without failure.
The document provides detailed specifications and descriptions of various types of current limiting fuses.
Lists specifications for different fuse types.
Describes the features of CLT type fuses.
CLT fuses are constructed with pure silver fuse elements.
Provides guidance on selecting the appropriate fuse.
Details on fuse mountings and hardware are provided.
This document provides detailed specifications and product information for Eaton's current limiting fuses.
Lists various current ratings, dimensions, and catalog numbers for different types of fuses.
Details on fuse mounting types and hardware are provided.
Includes a product selection guide for DSL, MDSL, and NPL type low voltage current limiters.
Dimensional drawings and approximate dimensions are provided for CXN and CX type fuses.
Concludes with Eaton's terms and conditions of sale.
Outlines the complete terms and conditions for the sale of products or services by Eaton Corporation.
No amendments or modifications are binding unless made in writing by an authorized representative of the seller.
Written quotations are valid for 30 days unless otherwise stated.
Orders can be terminated by the buyer with written notice and payment of termination charges.
Prices are subject to change without notice.
Orders under $1,000 incur a shipping and handling charge.
Payment terms are net 30 days from invoice date.
Freight terms vary and are detailed on product discount sheets.
Products are warranted to conform to specifications and be free from defects for one year from installation or 18 months from shipment.
For an additional cost, the seller covers direct costs of removing, transporting, and reinstalling defective products.
This document is a catalog cross-reference for fuses, providing a comprehensive list of catalog numbers and their corresponding style numbers.
- Catalog Number and Style Number Cross Reference: Lists various catalog numbers alongside their style numbers.
- Product Variants: Includes a wide range of product variants.
- Appendix: Provides additional cross-reference information.
- Specifications: Each entry provides a specific catalog number and its corresponding style number.
- Product Range: Covers a broad range of fuses.
- Usage: Intended for use by engineers, procurement specialists, and inventory managers.
This document serves as a vital tool for professionals in the electrical sector.
Catalog excerpts
Electrical Sector Solutions Electrical Sector Solutions Volume 14: Fuses Available in electronic format only. Publication No. CA08100016E / MSC
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Volume 14—Fuses Tab 1—Fuses General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V14-T1-1 Tab 2—Expulsion Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V14-T2-1 Tab 3—Current Limiting Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V14-T3-1 Appendix 1—Eaton Terms & Conditions . . . . . . . . . . . . . . . . . . . . . . . . V14-A1-1 Appendix 2—Superseded Style Number Index. . . . . . . . . . . . . . . . . . . V14-A2-1 Appendix 3—Catalog Number/Style Number Cross Reference . . . . . V
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Copyright Dimensions, Weights and Ratings Dimensions, weights and ratings given in this catalog are approximate and should not be used for construction purposes. Drawings containing exact dimensions are available upon request. All listed product specifications and ratings are subject to change without notice. Photographs are representative of production units. Terms and Conditions All prices and discounts are subject to change without notice. When price changes occur, they are published in the Eaton Corporation Price and Availability Digest (PAD). All orders accepted by Eaton’s electrical sector...
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Eaton Corporation is a global leader in power distribution, power quality, control and automation, and monitoring products. At Eaton, we believe a reliable, efficient and safe power system is the foundation of every successful enterprise. Through innovative technologies, cutting-edge products and our highly skilled services team, we empower businesses around the world to achieve a powerful advantage. In addition, Eaton is committed to creating and maintaining powerful customer relationships built on a foundation of excellence. From the products we manufacture to our dedicated customer service...
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Icons Green Leaf Eaton Green Solutions are products, systems or solutions that represent Eaton benchmarks for environmental performance. The green leaf symbol is our promise that the solution has been reviewed and documented as offering exceptional, industry-leading environmental benefits to customers, consumers and our communities. Though all of Eaton's products and solutions are designed to meet or exceed applicable government standards related to protecting the environment, our products with the Green Leaf designation further provide “exceptional environmental benefit”. Learn Online When you...
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Fuses General Current Limiting Fuses Product Overview Power Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power vs. Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low vs. Medium vs. High Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expulsion vs. Current Limiting (Definitions per ANSI C47.40-1993). . . Current Limiting Fuse Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . General Fuse Component Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expulsion...
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Fuses General Product Overview Typical Eaton Fuses Current Limiting Fuse Types . . . . . . . . . . . . . . . . . Expulsion vs. Current Limiting (Definitions per ANSI C47.40-1993). . . . . . . . . . . General Fuse Component Terms . . . . . . . . . . . . . . Product Overview Power Fuse Eaton’s roots in the medium voltage power fuse business began over 75 years ago under Westinghouse® Electric. In 1935, Westinghouse introduced the medium voltage boric acid expulsion fuse followed by the medium voltage current limiting fuse. Even today, medium voltage fuses continue to use that core technology. Eaton...
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Fuses General Product Overview Expulsion vs. Current Limiting (Definitions per ANSI C47.40-1993) General Fuse Component Terms An expulsion fuse is a vented fuse in which the expulsion effect of the gases produced by internal arcing, either alone or aided by other mechanisms, results in current interruption. Backup Fuses A fuse capable of interrupting all currents from the maximum rated interrupting current down to the rated minimum interrupting current. A current limiting fuse is a fuse that, when its current responsive element is melted by a current within the fuse’s specified current limiting...
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Fuses General Product Overview Disconnect Mounting The disconnect mounting allows the fuse unit to be removed (off load) using an insulated switch stick. The switch stick grabs a pull ring and disconnects the fuse unit that may then be lifted out of its mounting. Dropout Mounting Dropout mountings are used in outdoor applications. The fuse unit is equipped with a mechanical trigger that unlatches the upper contact, allowing the fuse unit to drop out, increasing the dielectric separation, and providing visible indication of a blown fuse. Live Parts Live parts were briefly discussed as part of...
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Expulsion Fuses Eaton Expulsion Fuses Product Overview Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refillable and Replaceable Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outdoor Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RBA and RDB Type Fuses Product Description . . . . . . . ....
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Expulsion Fuses Product Overview Eaton Expulsion Fuses Catalog Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . Refillable and Replaceable Fuses. . . . . . . . . . . . . . Outdoor Applications . . . . . . . . . . . . . . . . . . . . . . . Product Description Eaton’s expulsion fuses use boric acid as the interrupting medium. Under a fault condition, arc heat decomposes the boric acid into water vapor. The water vapor blast de-ionizes the arc path preventing arc re-ignition after a natural current zero. RBA type indoor expulsion fuses must be fitted with a discharge filter or condenser,...
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