ABB Emax series air circuit breakers
ABB Emax series air circuit breakers, low–voltage terminal power distribution products
As the flagship product in ABB’s low-voltage power distribution portfolio, the Emax series of air circuit breakers has undergone continuous evolution. Thanks to comprehensive, reliable electrical performance, an ultra-compact design, and ongoing advancements—ranging from traditional distribution protection to intelligent energy management—the series delivers core solutions that combine high safety with exceptional efficiency across a wide spectrum of sectors, including industrial manufacturing, critical infrastructure, and renewable energy.
Overview of Key Parameter Comparisons:
| Comparison Dimensions | Emax (Classic Series) |
| Product Model | X1, E1, E2, E3, E4, E6 |
| Frame current (Iu) | Maximum 6300A (E6) |
| Rated voltage (Ui) | Maximum 1000V |
| Division ability (ICU) | Up to 150kA (E6 V class) |
| Short-term tolerance (Icw) | Maximum 100kA/1s (E6) |
| Trip unit type | PR111/P, PR112/P, PR113/P, PR121/P, PR122/P, PR123/P |
| Protection function | LI, LSI, LSIG, etc. |
| Smart functions | Weak , basically lacking these functions |
| External dimensions |
Relatively large: • E1 (approximately 300mm wide) • E4 (approximately 576mm wide) |
Explanation of “Breaking Capacity Class”: ABB uses letters to represent different breaking capacity classes, such as B (42kA), N (66kA), S (85kA), H (100kA), V (150kA), etc. For example, E2.2N represents a circuit breaker with an E2.2 frame and a breaking capacity of 66kA (N class).
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