ABB SACE Emax Low Voltage Air Circuit Breaker

When building or upgrading a power distribution system, you need a breaker that not just trips but also thinks. The ABB SACE Emax 2 circuit breaker is designed to do this. More than an air circuit breaker, it is a true low voltage power breaker and an intelligent power manager for current electrical systems.

Whether you work in an industrial plant, data center, hospital, or commercial site, you need protection that is dependable, scalable, and future-proof. That’s where ABB SACE Emax 2 works best.

What Is the ABB SACE Emax 2 Circuit Breaker?

The ABB SACE Emax 2 circuit breaker is the latest version of low-voltage air circuit breakers that come in four frame sizes (E1.2, E2.2, E4.2, and E6.2) and have current ratings of up to 6,300A. These breakers can handle anything from normal power distribution to complicated setups combining generators, automation systems, and energy management platforms.

ABB describes Emax 2 as the progression of a molded case circuit breaker into a Power Manager. That means you are not only protecting circuits; you are actually controlling and optimizing energy use within your building.

Air Circuit Breaker Benefits for Contractors

When you are out in the field, the true value of a breaker can be seen by how easy it is to install, how reliable it is, and how quickly it can be serviced. Emax 2’s air circuit breaker benefits for contractors are designed to save you time and deliver an improved long-term solution to your customer.

Emax 2’s tiny dimensions let you to install high-rating switchgear in smaller footprints, which is especially useful in retrofit projects or space-constrained electrical rooms. Accessories and protective trip units are common across the Emax 2 series, eliminating the need to relearn hardware while switching between frame sizes. This consistency speeds up installation, lowers errors, and makes stocking extra parts easier.

Front-accessible components mean routine adjustments, upgrades, or replacements can be performed without fully disassembling the breaker or pulling it out of the switchgear. You can also choose between fixed and withdrawable versions depending on how frequently the breaker needs service. All this adds up to less downtime, faster commissioning, and smoother project completion.

Low Voltage Power Distribution Breaker Built for Performance

The Emax 2 family supports interrupting ratings from 42kA up to 200kA, enabling coordination in demanding installations. Each frame size is optimized for both space savings and high performance:

E1.2: Up to 1600A in a very compact footprint

E2.2: Up to 2500A with up to 100kA interrupting rating

E4.2: Up to 4000A with high withstand capability

E6.2: Up to 6300A with 200kA interrupting rating

This performance range makes the low voltage power distribution breaker ideal for industrial switchgear, data centers, marine applications, and large commercial systems.

ABB SACE Emax 2 Communication and Energy Management

Every ABB SACE Emax 2 circuit breaker can include communication modules supporting Modbus, Profibus, DeviceNet, Modbus TCP, Profinet, EtherNet/IP, and IEC 61850.

What this means for you is that you may integrate the breaker directly into building management systems, SCADA platforms, or energy monitoring software. You get real-time visibility into current, voltage, power, and energy consumption, as well as the ability to remotely monitor breaker status, alarms, and operating history. This allows facilities to shift from reactive maintenance to proactive and predictive.

Selecting Air Circuit Breakers for Industrial Use

When picking air circuit breakers for industrial usage, begin by determining the available fault current at the installation point and the continuous current required by the load. Evaluate how the breaker will work with upstream and downstream equipment, whether communication and monitoring are required, and the amount of physical space allowed in the switchgear.

Emax 2 simplifies this process by offering a broad range of frame sizes, uniform protection platforms, and flexible communication options — making it easier to configure a breaker that fits your exact application.

Advanced Ekip Protection Trip Units

ABB’s Ekip trip units transform Emax 2 into a complete protection, measurement, and control system.

Ekip Dip – Reliable overcurrent protection

Ekip Touch – Protection plus measurements

Ekip Hi-Touch – Adds Network Analyzer and advanced functions

Ekip G Touch / Hi-Touch – Generator protection

Trip units are front-replaceable and self-powered by the breaker’s current sensors. You can program and monitor them using a tablet, smartphone, or PC with ABB’s Ekip Connect software, reducing commissioning time and improving accuracy.

Ease of Use and Safety You’ll Appreciate

On real job sites, safety and simplicity matter as much as performance. The ABB SACE Emax 2 circuit breaker is designed so operators and maintenance personnel can immediately understand the breaker’s status and work around energized equipment.

Clear mechanical indicators show if the breaker is open, closed, or ready to close, and whether the closing springs are charged or discharged. Double insulation between the front of the switchgear and live parts protects technicians during inspection and servicing.

Withdrawable versions move along dedicated guide rails and lock securely into racked-in, test, and racked-out positions, reducing operator error and adding safety.

The large color touchscreen on Ekip Touch and Hi-Touch trip units provides common-sense navigation through settings, measurements, and alarms. Accessories and circuit breaker trip units are front accessible, so routine service can be completed without removing the breaker from the lineup. These features lower arc-flash exposure, shorten maintenance windows, and keep critical systems online.

Lifecycle Support and Retrofit Options

ABB supports Emax 2 from selection through end-of-life with installation assistance, training, preventive maintenance, spare parts, and retrofit kits. Existing Emax withdrawable (drawout) breakers can be upgraded to Emax 2 without changing busbars, letting facilities modernize protection and monitoring while minimizing downtime.

Final Thoughts

If you want an ABB Molded Case breaker that goes beyond basic protection, the ABB SACE Emax 2 circuit breaker delivers. With high fault ratings, advanced communications, intuitive protection trip units, and built-in energy management capabilities, Emax 2 gives you a smarter foundation for modern power distribution.

Learn more about New, Refurbished, Surplus or Reconditioned Circuit Breakers that Prevent Overcurrent and Protect Your Electrical Equipment.

ABB SACE Emax 2 Frame Size Selection Table

Frame Size	Continuous Current Range (A)	Max Interrupting Rating (kA @ 440V)	Typical Applications
E1.2	630 – 1600 A	Up to 66 kA	Small industrial switchgear, compact commercial systems
E2.2	800 – 2500 A	Up to 100 kA	Manufacturing, healthcare, mid-size facilities
E4.2	1600 – 4000 A	Up to 150 kA	Large commercial, infrastructure, data centers
E6.2	3200 – 6300 A	Up to 200 kA	Heavy industrial, utilities, large substations

Term	Definition
Low Voltage Air Circuit Breaker	A power circuit breaker designed to protect low-voltage electrical systems from overloads and short circuits.
Power Circuit Breaker	A heavy-duty breaker used as a main or feeder device in switchgear and switchboards.
Air Circuit Breaker (ACB)	A breaker that uses air as the arc-quenching medium during interruption.
Interrupting Rating (kA)	The maximum short-circuit current a breaker can safely interrupt.
Frame Size	The physical breaker platform that determines current range and mechanical dimensions.
Trip Unit	The electronic or thermal-magnetic device that senses faults and initiates tripping.
Withdrawable Circuit Breaker	A breaker mounted on rails that can be racked in and out for maintenance.
Selective Coordination	A protection strategy ensuring only the breaker nearest the fault trips.
Energy Monitoring	Measurement of current, voltage, power, and energy usage in real time.
Communication-Enabled Breaker	A breaker capable of sending data to SCADA, BMS, or monitoring systems.

Hours of Operation

ABB SACE Emax Low Voltage Air Circuit Breaker

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