The ABB SACE E2.2N 3‑pole Air Circuit Breaker is a low‑voltage protective device in ABB’s Emax 2 E2.2N series designed for industrial and commercial power distribution applications. It provides reliable protection for three‑phase electrical circuits by interrupting current under overload, short‑circuit, instantaneous and ground‑fault conditions when equipped with the appropriate electronic trip unit. The breaker can be configured in fixed or withdrawable forms and supports a variety of electronic protection modules (such as Dip LI, LSIG, Touch LSIG, etc.) to suit different network coordination requirements. These breakers are typically installed as main or feeder protection elements in switchgear, power panels, and distribution boards.

The ABB PR121/P is a digital electronic trip unit designed for use in ABB SACE Emax low‑voltage air circuit breakers. It provides adaptive and adjustable protection against multiple types of overcurrent faults in three‑phase AC power distribution systems. The PR121/P trip unit integrates easily into compatible breakers and allows the user to configure protection settings via front‑panel DIP switches or interface LEDs. It is suitable for use in industrial and commercial electrical panels to protect circuits against overload, short‑time faults, instantaneous short circuits, and optionally ground faults. It is typically paired with breakers rated for In = 1250 A and is often powered by a 220–240 V AC auxiliary/control supply for its internal electronics and signaling functions.

The ABB PR122/P‑LSI is an electronic overcurrent protection trip unit designed for use in ABB’s low‑voltage air circuit breakers (ACBs). It provides adjustable and coordinated protection for three‑phase power distribution systems by detecting and interrupting abnormal current conditions. The PR122/P‑LSI unit integrates long‑time (L), short‑time (S), instantaneous (I), and ground fault (G) protection functions, enabling flexible setting ranges for system coordination and selective fault clearing. It is suitable for industrial, commercial, and utility electrical installations where reliable protection and tuning are required. The “3P” designation indicates protection in three polar phases (typically three‑phase systems).

ABB Emax 2 low-voltage air circuit breaker, configured with a fixed mounting (FIXED), 1250A frame, and equipped with the advanced PR121/P electronic trip unit. This device is designed for main protection and distribution in medium to large-scale electrical installations such as industrial plants, commercial buildings, and infrastructure projects.

The ABB E4N 4000 T LSI 3‑pole Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s Emax E4N series designed for three‑phase industrial and commercial power distribution systems. It combines a rugged breaker frame with an electronic protection trip unit (LSI) that provides coordinated and adjustable protection against overloads, short‑time faults, and instantaneous short circuits. The breaker comes with both fixed horizontal rear (FHR) and withdrawable (WMP) mounting options, allowing flexibility in switchgear installation and maintenance. The T designation typically indicates the inclusion of enhanced measurement, communication, or touch interface features on the trip unit. The NST suffix indicates compliance and classification related to the breaker version and frame style.

The ABB E3N3200 PR121/P‑LSIG 4‑pole WHR Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s SACE Emax E3N series designed for three‑phase power distribution systems. It incorporates a PR121/P‑LSIG electronic trip unit that provides adjustable protection against overload, short‑time, instantaneous, and ground fault conditions. The breaker’s withdrawable horizontal rear (WHR) configuration allows it to be easily removed from switchgear frames for maintenance or service without disconnecting main busbars. This type of circuit breaker is suited for use as a main distribution breaker or feeder protection in industrial and commercial switchgear.

The ABB E3H1250 PR121/P‑LI 3‑pole WHR Air Circuit Breaker is a high‑performance low‑voltage protective device from ABB’s SACE Emax E3 series designed for three‑phase electrical distribution systems. It incorporates an electronic PR121/P‑LI trip unit, which provides adjustable protection against overloads, short‑time faults, instantaneous short circuits, and optionally ground faults (depending on configuration). The breaker is configured with a withdrawable horizontal rear (WHR) mounting style, allowing it to be safely removed from switchgear for maintenance or inspection without disconnecting the main busbars. This model is typically used as a main distribution breaker or feeder protection in industrial and commercial switchgear installations where reliable coordination and fault clearing are essential.

The ABB F2S 2500 A 4‑pole WMP Air Circuit Breaker is a high‑current low‑voltage protective device designed for three‑phase power distribution systems in industrial and commercial electrical installations. It belongs to ABB’s range of withdrawable (WMP) air circuit breakers, providing reliable protection and switching of electrical circuits carrying up to 2500 A of continuous current. The breaker interrupts fault currents and protects against overloads, short circuits and abnormal conditions when equipped with a suitable electronic trip unit. The WMP (withdrawable movable part) design allows the breaker to be safely inserted and removed from its switchgear frame for maintenance or inspection without disconnecting the main busbars, improving safety and uptime.

The ABB E2.2N 3‑pole Air Circuit Breaker is a low‑voltage protective device from ABB’s SACE Emax 2 E2.2N series designed for industrial and commercial three‑phase power distribution systems. It provides reliable overcurrent protection for electrical circuits and helps safeguard against overloads, short circuits and fault conditions when used with an appropriate electronic trip unit. The breaker series supports robust construction, high interrupting capacity, and flexible configuration options for fixed or withdrawable installations in switchgear and distribution panels. E2.2N breakers are suited for use as main distribution breakers or feeder protection breakers in power distribution networks.

The ABB E2S 2500 T LI 3‑pole WMP Air Circuit Breaker is a high‑capacity low‑voltage protective device designed for three‑phase AC power distribution systems. It belongs to ABB’s Emax 2 E2S series of draw‑out (“WMP” – Withdrawable Moving Part) air circuit breakers and features an electronic trip unit (“LI”) that provides coordinated long‑time, instantaneous, and other overcurrent protection functions. The breaker is suitable for use as a main distribution breaker or feeder protection breaker in industrial and commercial switchgear installations, offering reliable interruption of fault currents and easy maintenance thanks to its withdrawable design.