E3H1250 R800 PR121/P-LI WHR_ABB_PRODUCT_吉林易择科技技术发展有限公司

Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax E3H Product Type Air Circuit Breaker (ACB) with withdrawable horizontal rear (WHR) design Model / Code E3H1250 PR121/P‑LI Configuration 3‑pole (three‑phase) Rated Continuous Current (In / Iu) 1250 A Trip Unit Type PR121/P‑LI electronic overcurrent protection Protection Functions Long‑time overload (L), Short‑time (S), Instantaneous (I), with optional ground fault (G) functionality Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC Rated Impulse Withstand Voltage (Uimp) 12 kV Rated Short‑Circuit Breaking Capacity (Icu) Up to ~100 kA (depending on system voltage) Service Short‑Circuit Breaking Capacity (Ics) ~85 kA typical Short‑Time Withstand Current (Icw) ~75 kA for 1 s / ~65 kA for 3 s Rated Frequency 50 / 60 Hz Mounting Style Withdrawable horizontal rear (WHR) for switchgear Standards Compliance IEC low‑voltage circuit breaker safety and performance standards Typical Applications Main distribution breaker, feeder breaker in industrial and commercial switchgear

Grace +86 13600179521

DESCRIBE

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.

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