Eaton Cutler-Hammer Circuit Breakers Overview

The complete range of miniature circuit breakers feature UL 489 listed DIN rail mounted miniature circuit breakers up to 40A current rating. Their current-limiting design provides fast short-circuit interruption that reduces the let-through energy which can damage the circuit. They are also suitable for branch circuit device protection and thermal-magnetic overcurrent protection, with three levels of short circuit protection, categorized by B, C, and D curves. The breaker has a trip-free design, meaning that it cannot be defeated by holding the handle in the ON position. Screws cannot be lost thanks to their captive design.

Paragraph for Section Goes Here Just TypeEaton offers the widest variety of molded case circuit breakers available today. Their proven designs incorporate the latest in innovation with the highest reliability attainable. Eaton's molded case circuit breakers are further split into two series: C Series and G Series. These circuit breakers are suitable for a wide variety of applications, including: Machine tool control panels and motor control centers, panelboards, feeder pillars, switchgear, busbar trunking tap-offs, individual enclosures, engine generators, DC and mining applications, and many more. The quality, dependability, and reliability of every Eaton circuit breaker is ensured by a thorough program of in-plant testing. Two calibration tests are conducted on every pole of every circuit breaker to verify the trip mechanism, operating mechanism, continuity and accuracy. Circuit breakers are current limiting because of their high repulsion contact arrangement and use of state-of-the-art arc extinguishing technology. Eaton offers one of the most complete lines of current limiting breakers in the industry. The industrial breakers are available in current limiting versions with interrupting capacities up to 200 kA at 480V without fuses in the same physical size as standard and high interrupting capacity breakers. Eaton circuit breakers feature a toggle handle operating mechanism, which also serves as a switching position indicator. The indicator shows the positions of ON, OFF, or TRIPPED, when the breaker is tripped by one of its overcurrent, short circuit, shunt or overvoltage releases. Before it can be reclosed, the toggle handle must be brought beyond the OFF (RESET) position.

• C Series Family: The C Series family ranges from 15-2500 amperes and includes thermal-magnetic breakers, electronic trip breakers, molded case switches, motor circuit protectors, and specially designed breakers for engine generator, DC and mining applications. This section of circuit breakers includes: Thermal magnetic trip breakers, electronic rms trip breakers, molded case switches, motor circuit protectors, current limiting breakers, and special application breakers. Special non- UL-listed calibrations are available for certain ambient temperatures other than 40°C and for frequencies other than 50/60 Hz or DC. All circuit breaker cases are molded from glass-polyester which does not support the growth of fungus. The circuit breakers may also be ordered with optional freeze-testing, which will apply a special form of lubrication and mechanical operation is verified at -40°C.
• G Series Family: The G series molded case circuit breakers provide increased performance in considerably less space than standard circuit breakers or comparable fusible devices. The "G" signifies global applications. They are marked with UL, CSA, CE, IEC, and KEMA KEUR listings. They also feature field-fit accessories, common accessories through 630 amperes, electric trip units from 20 to 2500 amperes, UL-listing and IEC-rated 30 mA ground fault/earth leakage modules. And built-in ground fault protection down to 20 amperes. The series G family includes five frame sizes in ratings from 15 to 2500 amperes. Series G also offers a choice of several interrupting capacities up to 200 kA at 480 volts AC (200 kA at 240 volts AC). The G series of molded case circuit breakers are also available in direct current options. Using the electromechanical forces produced by high-level fault currents, a high-speed "blow-open" action is created. Eaton's circuit breakers are operated by a toggle-type mechanism that is mechanically trip-free from the handle so that the contacts cannot be held closed against short circuit currents. When an overload or short circuit causes a trip, it will be clearly indicated by the position on the handle. This fast and dependable contact action is designed to enhance safety.

Suitable applications for Eaton Cutler-Hammer Miniature Circuit Breakers include:

• Convenience receptacle circuits (internal/external)
• Motor control circuits
• Load circuits leaving the equipment (external)
• HACR internal/external equipment (heating, air conditioning, refrigeration)
• PLC I/O Points
• Computers
• Power Supplies
• Control instrumentation
• Relays
• UPS
• Power conditioners

Suitable applications for Eaton Cutler-Hammer Molded Case Circuit Breakers include:

• Electrical OEMs
• Machinery OEMs
• Navy breakers:
• UL489 Supplement SB
• MIL-C-17588
• MIL-C-1761
• ABS/NVR
• Mining breakers up to 1100 VAC
• Earth leakage
• DC breakers 125-750 VDC
• Engine generator breakers 15-1200 amperes
• Current limiting breakers

Certification marks ensure product compliance with the total standard vvia the third party witnessing of tests by globally recognized independent certification organizations. KEMA is a highly recognized, independent international organization that offers certification and inspection facilities for equipment in many industries. The KEMA-KEUR mark is the highest certification an electrical product can receive from KEMA. Eaton's IEC 60947-2 molded case circuit breakers are KEMA tested and certified. Additionally, these breakers are also listed in accordance with UL 489, as well as CSA 22.2 No. 5-02. KEMA, UL, and CSA all provide ongoing follow-up testing and inspections to ensure that Eaton molded case circuit breakers continue to meet their exacting standards.

• Eaton Series G circuit breakers meet applicable UL 489 and IEC 60947-2 standards.
• Molded case circuit breakers from Eaton are designed to conform with the following international standards:
  • Australian Standard AS 2184 and AS 3947-2 molded case circuit breakers.
  • British Standards institution standard EN609472
  • International Electromechanical Commission Recommendations IEC 609472 circuit breakers
  • Japanese T-Mark standard molded case circuit breakers
  • National Electrical Manufacturers Association Standards Publication No. AB1-1993 molded case circuit breakers.
  • South African Bureau of Standards, Standard SANS 156, Standard Specification for molded case circuit breakers.
  • Swiss Electro-Technical Association Standard SEV 947.2, Safety Regulations for circuit breakers.
  • Union Technique de I'Electricite Standard NF C 63-120, low voltage switchgear and control gear circuit breaker requirements.
  • Verband Deutscher Elektrotechnike (Association of German Electrical Engineers) Standard VDE 0660, low voltage switchgear and control gear, circuit breakers.