Breakers Cutler Hammer

Molded Case Circuit Breakers Electrical Aftermarket Products and Services
March 2006
Aftermarket Solutions, Ref. No. [011]

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Molded Case Circuit Breakers

Contents
Description Molded Case Circuit Breakers Product Description, History, Major Product Introduction. . . . . . . . . . . . . . . General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . Nameplate Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifying Factory Original Circuit Breakers . . . . . . . . . . . . . . . . . . . . Replacement and Upgrade Options . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement Guides Miniature Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Molded Case Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement Devices Circuit Breakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Molded Case Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor Circuit Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Panelboard Replacement Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor Control Center Replacement Breakers . . . . . . . . . . . . . . . . . . . . TechnologyUpgrades for Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . Handle Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement and Service Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . Further Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cross-ReferenceWestinghouse, Challenger and Bryant Replacements . . . . . . . . . . . . . Breaker Replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mining Breaker Replacements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pricing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3-2 3-2 3-3 3-4 3-5 3-6 3-9 3-143-49 3-51 3-52 3-64 3-65 3-72 3-74 3-77 3-95 3-95 3-96 3-98 3-116 3-118

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Molded Case Circuit Breaker Family

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CA08105001E

For more information visit: www.EatonElectrical.com

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Molded Case Circuit Breakers Electrical Aftermarket Products and Services
March 2006
Aftermarket Solutions, Ref. No. [012]

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Product Description
Cutler-Hammer Molded Case Circuit Breakers from Eaton’s electrical business are designed to provide circuit protection for low voltage distribution systems. They are described by NEMA as “. . . a device for closing and interrupting a circuit between separable contacts under both normal and abnormal conditions,” and furthermore as “. . . a breaker assembled as anintegral unit in supporting an enclosed housing of insulating material.” The NEC describes them as “. . . a device designed to open and close a circuit by non-automatic means, and to open the circuit automatically on a predetermined overload of current, without injury to itself when properly applied within its rating.” Circuit breakers protect against overloads in conductors and protects againstshort circuits in connected apparatus such as motors and motor starters. Circuit breakers are designed for use in panelboards, switchboards, motor control centers, control panels, combination starters, individual enclosures, and bus duct plug-in units.

motors resulted in a demand for a device that would ensure safe operation and, at the same time, protect electrical circuits. During this...