ABB SACE Emax2 E1.2B 1250A 690V 3P 50/60Hz

The E1.2B is the entry frame air circuit breaker of ABB SACE Emax2 series, rated continuous current 1250A, 3-pole, rated operational voltage up to 690V AC, 50/60Hz. The B defines short-circuit performance grade, Icu=42kA at 690V. The 12kV marked in your note is not the rated voltage of this low voltage ACB, it is a mix-up with medium voltage equipment. This E1.2B can be fixed or withdrawable type, equipped with Ekip Dip / Ekip Touch / Ekip Hi-Touch electronic trip units, supporting LI, LSI or LSIG adjustable protection including overload, short-time delay, instantaneous short-circuit and earth fault protection.

This E1.2B 1250A adopts spring stored-energy operating mechanism, optional motor operator for remote closing and tripping. Withdrawable version has connected, test and isolated positions for safe maintenance without busbar shutdown. It can be fitted with auxiliary contacts, shunt trip, undervoltage release and communication modules for Modbus TCP, PROFINET. Ekip Hi-Touch integrates power measurement, waveform capture, event log and graphic display. It complies with IEC 60947-2 standard.

The Emax2 series is ABB’s current mainstream low voltage air circuit breaker platform, widely used in industrial substations, power plants, photovoltaic and energy storage main incoming and distribution switchboards. Many electrical contractors and maintenance teams stock the E1.2B 1250A as spare breaker for panel retrofit and emergency replacement. Trip unit type, fixed/withdrawable structure and terminal configuration must be confirmed before replacement.