The ABB F4S 3200 4‑pole Air Circuit Breaker is a high‑current, low‑voltage protective device from ABB’s SACE F‑series (Megamax/Novomax class) designed for industrial and commercial three‑phase power distribution systems. It is rated at 3200 A continuous current and is built to handle heavy electrical loads with robust interruption performance. This breaker is used to protect electrical circuits against overloads, short‑circuits, and fault conditions, and can be installed in switchgear, distribution panels, and power distribution boards. Depending on configuration, the F4S frame can be fitted with an electronic trip unit (e.g., LSIG or PR1/P) to provide adjustable protective functions, status signaling, and optional communication/monitoring features. The 4‑pole design includes the neutral conductor for four‑wire systems.

The ABB PR121/P‑LSIG is an electronic overcurrent protection trip unit designed to be installed in compatible ABB low‑voltage air circuit breakers (ACBs). It provides adjustable and coordinated protection for three‑phase electrical distribution systems by detecting and responding to abnormal current conditions. The unit integrates multiple protection functions for comprehensive fault detection and system safety, including overload, short‑time currents, instantaneous short circuits, and ground faults. The PR121/P‑LSIG is suitable for industrial, commercial, and utility applications where reliable current protection, flexible coordination, and status indication are required.

The ABB E4S4000 PR121/P‑LI 3‑pole Fixed Horizontal Rear (FHR) Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s SACE Emax E4S series designed for industrial and commercial three‑phase power distribution systems. It includes an electronic PR121/P‑LI trip unit that delivers adjustable protection against overloads and instantaneous short‑circuit faults. The breaker is configured with fixed horizontal rear terminals, making it suitable for installation in switchgear and distribution cabinets where it functions as a main distribution breaker or feeder protection device.

The ABB PR121/P‑LI is an electronic overcurrent protection trip unit designed for integration into compatible ABB low-voltage air circuit breakers. It provides adjustable and coordinated protection for three-phase distribution systems, safeguarding against overloads and instantaneous short-circuit faults. The trip unit is suitable for industrial, commercial, and utility applications, ensuring reliable current protection and system safety.

The ABB E4S3200 PR121/P‑LSIG is a high-capacity low-voltage air circuit breaker from ABB’s Emax E4S series. It is equipped with a PR121/P‑LSIG electronic trip unit, providing adjustable protection against overloads, short-time currents, instantaneous short circuits, and ground faults. The breaker is suitable for use in industrial and commercial switchgear as a main distribution breaker or feeder protection. Its design allows for robust fault clearing and reliable protection of three-phase power distribution systems.

The ABB E4S3200 is a high-capacity low-voltage air circuit breaker from ABB’s Emax E4S series, designed for industrial and commercial three-phase power distribution systems. It provides reliable protection against overloads, short-circuits, and fault conditions when used with an appropriate electronic trip unit. The breaker can be used as a main distribution breaker or feeder protection device in switchgear installations. It is available in various configurations, including fixed or withdrawable mounting, and supports electronic trip units such as PR121/P-LI or PR121/P-LSIG for adjustable and coordinated protection.

The ABB SACE E4H 40 Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s Emax E4H series designed for three‑phase electrical power distribution systems. It is used to protect electrical circuits against overloads, short circuits, and fault conditions, and can be configured with electronic protection trip units for adjustable protection settings. The breaker is suitable for installation in industrial or commercial switchgear, distribution panels, or power cabinets where robust protection and high interrupting capacity are required. Variants include fixed (with horizontal, vertical, or front terminals) or withdrawable mounting styles.

The ABB E4S4000 PR121/P‑LSIG is a high‑capacity low‑voltage air circuit breaker from ABB’s Emax E4S series designed for industrial and commercial three‑phase power distribution systems. It is equipped with the PR121/P‑LSIG electronic trip unit, which provides coordinated and adjustable protection against overloads, short‑time faults, instantaneous short circuits, and ground faults. This breaker is suitable for use as a main distribution breaker or feeder protection device in electrical switchgear and distribution panels, offering dependable fault interruption and system reliability.

The ABB SACE E1 800 A PR122/P‑LSI Air Circuit Breaker is a low‑voltage protective device from ABB’s Emax E1 series designed for industrial and commercial three‑phase power distribution applications. It integrates the PR122/P‑LSI electronic trip unit, which provides coordinated and adjustable protection against overloads, short‑time faults, instantaneous short circuits, and ground faults. This breaker is suitable for use as a main distribution breaker or feeder protection device in switchgear and power panels, offering reliable fault clearing and flexible coordination to match system requirements.

The ABB E1.2C 1600 A 3‑pole Air Circuit Breaker is a low‑voltage protective device from ABB’s SACE Emax 2 E1.2C series, designed for industrial and commercial power distribution applications. It provides reliable protection for three‑phase circuits against overload and short‑circuit faults when equipped with an appropriate trip unit such as Ekip Touch LI, Ekip Touch LSIG, Ekip Dip LI, or Ekip Dip LSIG. This fixed‑mount breaker is suitable as a main distribution breaker or feeder protection device in switchgear, distribution panels, and electrical installations operating up to ~690 V AC. It also typically includes auxiliary contacts and status indications for breaker position and signaling.