Thermal Circuit Breaker 3120-N: All-In-One Solution - Protecting and Switching in a Single Component

For many design engineers it is the perfect solution to make their equipment reliable, compact and economic. The 3120-N thermal circuit breaker is the professional all-in-one solution for devices & machines. Well-proven a million times over, the 3120 reliably disconnects overcurrent and also serves as an ON/OFF switch. After tripping due to an overcurrent, the user can easily and quickly reset the 3120-N to resume operation. Time-consuming replacement of fuses is eliminated.

Your Benefits
•  Unrivalled equipment availability
•  Reduced mounting and wiring time
•  pace-saving design
•  Reduced planning and storage costs
•  Enhanced reliability

Seven In One
E-T-A’s 3120-N circuit breaker here replaces 2 blade fuse holders, 2 blade fuses, a double pole rocker switch as well as the two cable connections between the rocker switch and fuse holder.

You are Free to Choose
A wealth of product versions is available of the 3120-N circuit breaker/switch combination. Depending on the requirements, you can choose between rocker and push button actuation. Product versions range from standard types to versions with actuator and/or dust and water splash protection.

Easy Actuation
Thanks to freely accessible rocker actuators and large push buttons, the breakers can conveniently be operated even if fitted with actuator guards or water splash protection. Switching the device is simple, even when the user is wearing gloves. Particularly noteworthy is the globally unique variant with innovative accordion-style seal. Even this version features a freely accessible rocker which provides a clearly visible status indication (ON or OFF).

International Approvals
Thanks to a great number of international approvals, the 3120-N is fit for global use:

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E-T-A offer a wide range of modular and flexible power distribution systems.

• Intelligent complete systems for power distribution and overcurrent protection with smart control and monitoring technology
• Conventional power distribution systems with standardized series products as well as special solutions
• Customized system solutions for the mobile machinery, industry and telecommunications sectors

E-T-A experts will be happy to advise you in order to find the optimal solution for your application.

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Electronic circuit protectors are purely electronic overcurrent protection devices. Electronic circuit breakers, however, offer mechanical disconnection in addition to the electronic trip, i.e. genuine physical isolation (bimetal).

• Devices for DC applications are ideally suited to selective protection of system components in industrial plants whose voltage supply is provided by a DC switch mode power supply.
• Products for AC applications are the ideal choice for the selective protection of uninterruptible power supplies (UPS) in industrial plants. These solutions ensure the power safety through AC UPS systems.
• The compact and flexible systems include a comprehensive DC 24 V protection and distribution solution for machine and panel builders, under the headline »all in one«.

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With ControlPlex®, PowerPlex® and SCS® Smart Control Systems E-T-A offers intelligent complete systems for power distribution and overcurrent protection for industrial applications, watercraft and vehicles. The bus systems provide a wealth of integral diagnosis and monitoring functions.

Your Benefits:
• Optimise the availability of systems, vehicles and loads
• Reduce power consumption significantly
• Reduce configuration and maintenance time
• Avoid downtimes

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Power management solutions begin with an understanding of your requirements. From concept to production, E-T-A is equipped with numerous standard systems along with the expertise and tools necessary to develop and produce a solution to meet the exact specifications of your application regardless of the complexity.

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Solid State Relays and Power Relays for Vehicles:
The automotive portfolio offers a wide range of high-end relays, particularly suitable for use in passenger cars, buses, trucks, specialty vehicles and emergency vehicles,construction machinery, forestry equipment and agricultural vehicles.

Solid State Remote Power Controllers for Factory Automation:
They offer reliable protection, switching and monitoring of DC 24 V circuits and loads. Typical applications are in the steel industry, automation and chemical production.

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E-T-A offers comprehensive solutions for protection of electronic equipment, encompassing E-T-A's offering of thermal, thermal-magentic, magnetic, high performance and electronic circuit breakers.

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E-T-A offers a variety of trip characteristics, providing optimum protection against overcurrent for any kind of application. Our wide product range comprises thermal, thermal-magnetic, purely magnetic and hydraulic-magnetic circuit breakers, also as a fuse replacement, including high performance circuit breakers and comprehensive electronic solutions. Disconnector switches are also part of our range. They are ideal main switches for industrial plants or load-independent remote controls in all types of vehicles.

E-T-A offers comprehensive solutions for protection of electronic equipment. Please select the desired product category to learn more about circuit breakers, circuit protectors, relays, control cabinet solutions enclosures and custom and standard power distribution solutions for your industry.

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Unrivalled Uptime in Machine Construction and Process Control

Requirements regarding product quality and stability of the production process are constantly rising in machine construction and process control.  The CPC12 ControlPlex System offers permanent data logging, analysis and processing.  This provides the required transparency to detect any changes in the production process at an early stage and to take countermeasures in time.

Consistency of the systems is particularly important.  Besides the field bus interfaces PROFINET and EtherCAT, the CPC12 bus controller also has another Ethernet interface. It allows access to the system even without fieldbus.  Direct access to the integral web server of the device is made possible.

All data and information are available on the device on site, but also in the office.  If the circuit protector has tripped, it can quickly be reset to operation.  Downtimes are reduced and machine uptime is increased.  Data can easily be analysed and evaluated later by means of remote access.

The modular REX system is especially adapted to the special requirements of machine construction and process control. The CPC12 bus controller extends the REX system by the connection to different fieldbus connections.  This makes your DC 24 V power distribution and protection more transparent than ever.

The REX12D electronic circuit protector records status and measuring values of each load circuit and transmits them to the bus controller.  System operators and maintenance staff thus receive all information they need to detect changes and possible undesirable developments at an early stage.

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The Most Powerful High Voltage Relay up to 1000 V

The HVR10 is a hybrid and powerful high voltage relay in a compact design. It combines physical isolation of an electro-mechanical contact with the capabilities of ultramodern semi-conductor technology.

The hybrid, arc-free switching system allows repeated and reliable disconnection, even in the event of an overload, of up to 2 megawatts – 2,000 A/1,000 V. The HVR10 withstands high short circuit currents up to 5,000 A until the fast high voltagefuse trips. The fist-sized unit can switch and permanently carry 300 A up to 100,000 times, arc-free and wear-free. The innovative self-monitoring function immediately signals critical operating conditions to the controlgear.

Benefits:
• Multiple disconnections even in critical conditions up to 2,000 A at 1,000 V.
• Enhanced protection of the on-board electrical system through integral fault detection and indication
• Minimum wear through arc-free switching

Technical Data:
• Voltage ratings 900 V
• Max. voltage 1,000 V DC
• Continuous current 300 A
• Switching capacity Imax off 2,000 A
• Max. holding current 5,000 A for 25 ms
• Degree of protection IP54
• Ambient temperature -40 °C … +85 °C

Standards:
• ISO 16750
• IATF 16949
• ECE R10
• ASIL upon request

Typical Applications
• Buses, trucks, construction machinery and special vehicles with electrical drivetrain
• Charging stations, power storage and main relays in the vehicle

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