E4S4000R4000 PR121/LSIG 3P WMP_ABB_PRODUCT_吉林易择科技技术发展有限公司

Technical Parameters Parameter Specification Manufacturer ABB Product Series SACE Emax E4S Product Type Air Circuit Breaker (ACB), Withdrawable Version (WMP) Configuration 3‑pole (three‑phase) Rated Continuous Current (Iu / In) 4000 A Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC Rated Impulse Withstand Voltage (Uimp) 12 kV Trip Unit Electronic PR121 with LSIG protection Protection Functions Long‑time (L), Short‑time (S), Instantaneous (I), Ground fault (G) Short‑Circuit Performance Level High performance level suitable for industrial networks Rated Service Short‑Circuit Breaking Capacity (Ics) ~75 kA across common low‑voltage levels Rated Ultimate Short‑Circuit Breaking Capacity (Icu) ~75 kA across common low‑voltage levels Rated Short‑Time Withstand (Icw) ~75 kA for 1 s and 3 s Terminal / Connection Type Withdrawable breaker connections for switchgear Mechanical Durability High durability for frequent operations Typical Applications Main distribution protection, switchgear feeder protection in industrial and commercial installations

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DESCRIBE

The ABB E4S4000R4000 PR121/LSIG 3‑pole WMP Air Circuit Breaker is a high‑capacity low‑voltage protective device from ABB’s SACE Emax E4S series designed for three‑phase industrial and commercial power distribution systems. It incorporates an electronic PR121/LSIG trip unit which provides adjustable protection for overloads, short circuits, and instantaneous faults. The unit is configured in a withdrawable (WMP) format, allowing the breaker to be easily inserted or removed from switchgear for maintenance without disturbing the main busbar connections. This breaker is suitable as a main distribution or feeder protection device in switchboards and electrical distribution installations where high reliability and fault clearing performance are required.

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