ABB SACE Emax 2 is a low-voltage air circuit breaker series covering 630–6300 A across four frame sizes: E1.2, E2.2, E4.2 and E6.2. The range offers 3-pole and 4-pole, fixed and withdrawable versions, with Ekip electronic trip units for circuit protection, measurement and power management.
The ABB SACE Emax 2 Air Circuit Breaker (ACB) series is designed for high-current low-voltage power distribution and advanced electrical system management. Covering rated current options from 400 A to 6,300 A across four frame sizes, E1.2, E2.2, E4.2 and E6.2, the series combines advanced electronic protection, accurate energy measurement and digital connectivity in a compact design. Equipped with Ekip electronic trip units and integrated power management functions, SACE Emax 2 provides reliable circuit protection and intelligent monitoring for industrial facilities, commercial buildings and critical power distribution systems.
The SACE Emax 2 series features Ekip electronic trip units that provide configurable protection functions for different electrical distribution requirements. Depending on the selected trip unit, protection functions include long-time, short-time, instantaneous and ground-fault protection. Advanced Ekip configurations also support protection coordination, fault analysis and electrical system monitoring. Interchangeable trip units and configurable protection settings provide flexibility for system commissioning, maintenance and future upgrades.
Beyond conventional circuit protection, Emax 2 incorporates power management functions to support efficient electrical distribution. Selected configurations provide load shedding, Power Controller, automatic transfer switching (ATS), synchrocheck and interface protection functions. Class 1 active energy measurement compliant with IEC 61557-12 is available on applicable IEC configurations, supporting accurate energy monitoring and consumption analysis.
The Emax 2 series supports integration into industrial automation and energy management systems through multiple communication protocols, including IEC 61850, Modbus TCP, Modbus RS-485, PROFIBUS, PROFINET, EtherNet/IP and DeviceNet. Embedded Bluetooth Low Energy connectivity supports local wireless access, while integration with ABB Ability Energy and Asset Manager enables remote equipment monitoring and predictive maintenance functions.
Available in fixed and withdrawable configurations, the SACE Emax 2 series supports different low-voltage switchboard designs. Its four frame sizes provide flexibility for various current ratings and installation requirements. Three-pole and four-pole versions, interchangeable trip units and front-accessible accessories help simplify switchgear integration, commissioning and maintenance.
The ABB SACE Emax 2 ACB series is suitable for high-capacity electrical distribution and power management in a wide range of applications, including:
Industrial Power Distribution: Main incoming and outgoing feeder protection in manufacturing plants.
Commercial Buildings: Main distribution protection in large commercial complexes and office buildings.
Data Centers: High-current circuit protection and power management for critical electrical infrastructure.
Power Generation: Generator and auxiliary power distribution protection.
Microgrids: Protection, load management and power coordination in distributed energy systems.
Marine and Infrastructure: Electrical distribution protection for naval platforms and critical infrastructure.
Frame Sizes: E1.2, E2.2, E4.2 and E6.2.
Rated Current: 400–6,300 A across the IEC product range.
Maximum Breaking Capacity: Up to 200 kA at 415/440 V AC for selected E6.2 configurations.
Pole Configuration: 3P and 4P.
Trip Units: Ekip DIP, Ekip Touch and other compatible electronic protection units.
Protection Functions: Overload, short-circuit and selected ground-fault protection.
Installation: Fixed and withdrawable versions.
Energy Measurement: Class 1 active energy measurement on applicable configurations.
Communication: IEC 61850, Modbus, PROFIBUS, PROFINET, EtherNet/IP and other compatible protocols.
Standards: IEC 60947-2 for IEC versions; UL 1066 and applicable ANSI/CSA standards for UL versions.
| Specification | Value |
| Rated uninterrupted current | 630–6300 A, depending on frame |
| Rated operating voltage / frequency | Up to 690 V AC / 50–60 Hz |
| Insulation / impulse withstand voltage | Ui 1000 V / Uimp 12 kV |
| Breaking capacity (Icu) | 42–150 kA at 400–415 V AC |
| Short-time withstand (Icw) | Up to 120 kA (1 s), E6.2 X |
| Pole / installation options | 3P or 4P / fixed or withdrawable |
| Protection units | Ekip Dip, Touch, Hi-Touch, G Touch, G Hi-Touch |
| Product standard | IEC 60947-2 |
| Frame | Performance levels | Iu range (40 °C) | Icu range @ 400–415 V |
| E1.2 | B · C · N | 630 – 1600 A | 42 – 66 kA |
| E2.2 | B · N · S · H | 800 – 2500 A | 42 – 100 kA |
| E4.2 | N · S · H · V | 2000 – 4000 A | 66 – 150 kA |
| E6.2 | H · V · X | 4000 – 6300 A | 100 – 150 kA |
| Model | Icu at 400–415 V | Icu at 690 V | Icw (1 s) | Icm at 400–415 V |
| E1.2 B | 42 kA | 42 kA | 42 kA | 88 kA |
| E1.2 C | 50 kA | 42 kA | 42 kA | 105 kA |
| E1.2 N | 66 kA | 50 kA | 50 kA | 145 kA |
| E2.2 B | 42 kA | 42 kA | 42 kA | 88 kA |
| E2.2 N | 66 kA | 66 kA | 66 kA | 145 kA |
| E2.2 S | 85 kA | 66 kA | 66 kA | 187 kA |
| E2.2 H | 100 kA | 85 kA | 85 kA | 220 kA |
| E4.2 N | 66 kA | 66 kA | 66 kA | 145 kA |
| E4.2 S | 85 kA | 66 kA | 66 kA | 187 kA |
| E4.2 H | 100 kA | 85 kA | 85 kA | 220 kA |
| E4.2 V | 150 kA | 100 kA | 100 kA | 330 kA |
| E6.2 H | 100 kA | 100 kA | 100 kA | 220 kA |
| E6.2 V | 150 kA | 100 kA | 100 kA | 330 kA |
| E6.2 X | 150 kA | 100 kA | 120 kA | 440 kA |
| Trip unit | Protection configuration | Main capability |
| Ekip Dip | LI / LSI / LSIG | Standard circuit protection and LED indication |
| Ekip Touch | LI / LSI / LSIG | Touchscreen, protection and electrical measurement |
| Ekip Hi-Touch | LSI / LSIG | Dual protection settings and grid analysis |
| Ekip G Touch / G Hi-Touch | LSIG | Generator protection applications |
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