Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax 2 (E2.2 frame) Product Type Air Circuit Breaker (ACB) Rated Current (In / Iu) 1600 A Number of Poles 3 (three‑phase) 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 (Optional) Electronic protection (LSI / LSIG depending on variant) Protection Functions Overload (L), Short‑Time (S), Instantaneous (I), Ground Fault (G) when equipped with the corresponding trip unit Short‑Circuit Breaking Capacity (Icu) Typical up to ~66 kA at 690 V AC Service Short‑Circuit Breaking Capacity (Ics) Typically similar to Icu at distribution levels Short‑Time Withstand Current (Icw) High withstand for 1 s / 3 s duty Connection Type Fixed horizontal rear terminals (FHR) Mounting Style Fixed installation in switchgear or distribution panel Rated Frequency 50 / 60 Hz Typical Applications Main power distribution, feeder protection, industrial electrical systems

Technical Parameters Parameter Specification Manufacturer ABB Product Series SACE Emax 2 – E1.2B Product Type Air Circuit Breaker (ACB), withdrawable (WMP) Configuration 3‑pole (three‑phase) Rated Continuous Current (Iu) 1250 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 Type Ekip DIP electronic protection with LI (Long‑time + Instantaneous) Protection Functions Long‑time overload (L), Instantaneous short‑circuit (I) Overload Setting Range Adjustable from ~500 A to 1250 A Instantaneous Setting Range Adjustable in a range up to ~18750 A Short‑Circuit Breaking Capacity (Icu) ~42 kA at 400 V AC and up to 690 V AC Service Breaking Capacity (Ics) ~42 kA (typical) Auxiliary Contacts Typically includes 4 change‑over auxiliary contacts Connection Style Withdrawable module for switchgear frames Rated Frequency 50 / 60 Hz Typical Applications Main power distribution, feeder protection in industrial and commercial switchgear

Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax E4 Product Type Air Circuit Breaker (Withdrawable – WMP) Model E4S4000A PR121/P-LSI Rated Continuous Current (Iu / In) 4000 A Number of Poles 3‑pole (three‑phase) 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 Type PR121/P-LSI (Long-time, Short-time, Instantaneous, Ground fault protection) Protection Functions L (overload), S (short-time), I (instantaneous), G (ground fault) Short-Circuit Breaking Capacity (Icu) 75 kA Service Short-Circuit Capacity (Ics) 75 kA Short-Time Withstand Current (Icw) 75 kA for 1 s / 3 s Terminal Connection Type Withdrawable (WMP) Rated Frequency 50 / 60 Hz Standards Compliance IEC low-voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial and commercial switchgear

Technical Parameters Parameter Typical Specification Manufacturer ABB Series / Family SACE Emax 2 – E2.2N frame Product Type Air Circuit Breaker (ACB) Number of Poles 3 (three‑phase) Rated Continuous Current (In / Iu) Varies by model (e.g., 800 A, 1250 A, 1600 A, 2000 A, 2500 A) depending on specific variant 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 (Protection Module) Electronic types such as Ekip Dip LI, PR121/P‑LSIG, Ekip Touch LSIG, etc. Protection Functions Long‑time overload (L), Short‑time (S), Instantaneous (I), Ground fault (G) — depending on trip unit Short‑Circuit Breaking Capacity (Icu) Typically up to ~66 kA (depending on product and settings) Service Breaking Capacity (Ics) Typically equal to Icu at distribution levels Short‑Time Withstand (Icw) High withstand for 1 s and 3 s duty Connection / Mounting Options Fixed (rear horizontal) or withdrawable (WHR/WMP) Frequency 50 / 60 Hz Standards Compliance IEC / low‑voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial and commercial switchgear

Technical Parameters Parameter Specification Manufacturer ABB Product Type Electronic Trip Unit for Air Circuit Breakers Model PR121/P Rated Current Setting (In) Configurable to match breaker rating (e.g., 1250 A) Power Supply / Auxiliary Voltage Typically 220‑240 V AC auxiliary supply for control and indication Protection Functions • Long‑time overload (L) • Short‑time delay (S) • Instantaneous short‑circuit (I) • Ground fault (G) ‑ depending on version (LSIG) Adjustable Settings Overload threshold and trip time range, short‑time delay and level, instantaneous pickup level User Interface Front‑panel DIP switches for setting protection thresholds and timing Indication LED indicators for protection status and trip cause Trip Output Operates breaker trip coil to open circuit under fault conditions Frequency 50 / 60 Hz operation Application Protection of low‑voltage AC distribution circuits in industrial/commercial switchgear Mounting Integrated into compatible ABB ACB protection slot Operating Environment Industrial electrical panels and switchgear

Technical Parameters Parameter Specification Manufacturer ABB Model / Type PR122/P‑LSI Trip Unit Product Category Electronic Overcurrent Protection Module Application Protection for low‑voltage air circuit breakers (3‑phase systems) Poles Protected 3P (Three‑phase protection) Protection Functions • L – Long‑time overload protection • S – Short‑time delayed overcurrent protection • I – Instantaneous short‑circuit protection • G – Ground fault / residual current protection Adjustability Adjustable pickup levels and time settings for L, S, I, G zones Trip Output Drives breaker trip coil to open under defined fault conditions User Interface Typically DIP switches, knobs, or menu settings (depending on model) Indication LEDs or digital indicators for fault status and trip cause Auxiliary / Control Supply AC or DC auxiliary supply voltage depending on breaker/platform (e.g., 110–240 V AC/DC) Frequency 50 / 60 Hz (depending on supply) Mounting Integrated within compatible ACB protection slot Typical Breaker Ratings Supported Commonly used with breakers rated from ~800 A up to ~4000 A (depending on frame size) Standards Compliance Designed to comply with international low‑voltage protection standards Operational Environment Electrical switchgear, distribution panels, industrial power networks

Technical Data: Series & Frame: Emax 2 (E2) - Specifically the E2N frame (optimized design) rated for 1250 A continuous current. Rated Ultimate Breaking Capacity (Icu): 65 kA or 85 kA at 415V AC (Definitive value depends on the specific E2N1250 ordering code – e.g., “R6565” for 65kA, “R8585” for 85kA). Number of Poles: 3 Poles (3P). Trip Unit: PR121/P-LSI - Digital Electronic Trip Unit. Protection Functions (Fully Adjustable): L - Overload Protection: Setting Ir = (0.4 to 1.0) x In. Time delay tr adjustable. S - Short-Time Protection: Setting Isd = (1.5 to 15) x Ir. Time delay tsd adjustable with I²t selectivity curve option. I - Instantaneous Protection: Setting Ii = (1.5 to 15) x In (fixed or adjustable). Measurement Functions: Displays real-time values for current (I), voltage (V), power (kW), energy (kWh), and power factor (cos φ) on its front-panel display. Communication: Not built-in by default. Requires optional communication module (e.g., MODBUS RTU, PROFIBUS DP, Ethernet) to be plugged into the trip unit for integration into supervisory systems. Mounting Type: Fixed (FIXED) - Permanently bolted to the switchboard assembly. (Draw-out version would be specified as “FHR” instead). Operating Mechanism: Stored-energy spring mechanism with manual charging handle. Can be optionally equipped with an electric charging motor. Standards Compliance: IEC/EN 60947-2, UL 1066, CSA C22.2 No. 5.

Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax E4N Product Type Air Circuit Breaker (ACB) Number of Poles 3‑pole (three‑phase) Rated Continuous Current (In / Iu) 4000 A Trip Unit Type LSI (Long-time, Short-time, Instantaneous) Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC Rated Impulse Withstand Voltage (Uimp) 12 kV Protection Functions L (overload), S (short-time), I (instantaneous) Short-Circuit Breaking Capacity (Icu) ~66–75 kA Service Short-Circuit Capacity (Ics) Comparable to Icu Short-Time Withstand Current (Icw) Rated withstand for 1 s / 3 s Mounting Options Fixed horizontal rear (FHR) or Withdrawable (WMP) Control & Measurement Features (T) Enhanced measurement and communication functions Rated Frequency 50 / 60 Hz Standards Compliance IEC low-voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial/commercial switchgear

Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax E3N Product Type Air Circuit Breaker (ACB), Withdrawable (WHR) Model E3N3200 PR121/P‑LSIG Number of Poles 4 P (three‑phase + neutral) Rated Continuous Current (In / Iu) 3200 A Trip Unit Type PR121/P‑LSIG electronic overcurrent protection Protection Functions Long-time (L), Short-time (S), Instantaneous (I), Ground fault (G) Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC Rated Impulse Withstand Voltage (Uimp) 12 kV Short-Circuit Breaking Capacity (Icu) ~65 kA Service Short-Circuit Capacity (Ics) ~65 kA Short-Time Withstand Current (Icw) ~65 kA (1 s / 3 s) Mounting Type Withdrawable (WHR) Rated Frequency 50 / 60 Hz Standards Compliance IEC low-voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial/commercial switchgear

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

Technical Parameters Parameter Specification Manufacturer ABB Product Type Air Circuit Breaker (ACB), Withdrawable WMP Number of Poles 4P (three‑phase + neutral) Rated Continuous Current (In / Iu) 2500 A Rated Operational Voltage (Ue) Up to 690 V AC Rated Insulation Voltage (Ui) 1000 V AC typical Rated Impulse Withstand Voltage (Uimp) 12 kV class Short‑Circuit Breaking Capacity (Icu) High interrupting ability per IEC low‑voltage standards (typical for this frame size) Service Short‑Circuit Capacity (Ics) Suitable service breaking performance for distribution networks Short‑Time Withstand Current (Icw) High withstand ratings for short‑time fault duty Mounting / Configuration Withdrawable Horizontal Rear (WMP) for switchgear systems Rated Frequency 50 / 60 Hz Protection Integration Designed to accept compatible electronic trip units (LSI / LSIG / LI etc.) for overcurrent and earth‑fault protection Typical Applications Main distribution breaker, feeder protection in switchgear and power panels

Technical Parameters Parameter Specification Manufacturer ABB Series / Family SACE Emax 2 – E2.2N Product Type Air Circuit Breaker (ACB) Number of Poles 3 (three‑phase) Rated Continuous Current (In / Iu) Available in multiple ratings (e.g., 800 A, 1250 A, 1600 A, 2000 A, 2500 A) Rated Operational Voltage (Ue) Up to ~690 V AC Rated Insulation Voltage (Ui) ~1000 V AC Rated Impulse Withstand Voltage (Uimp) ~12 kV Short‑Circuit Breaking Capacity (Icu) High interrupting capability (commonly ~66 kA across typical low‑voltage levels) Service Short‑Circuit Breaking Capacity (Ics) Service capacity matching breaking capacity at distribution levels Short‑Time Withstand Current (Icw) Withstand levels for durations such as 1 s and 3 s duty Protection Modules Compatible with electronic trip units such as Dip LI, Dip LSI, LSIG, Touch LSIG, etc. Trip Functions (when equipped) Long‑time (L), Short‑time (S), Instantaneous (I), and optionally Ground fault (G) depending on trip unit Connection Type Fixed rear horizontal or withdrawable mounting possible Rated Frequency 50 / 60 Hz Standards Compliance IEC low‑voltage circuit breaker standards Typical Applications Main distribution breaker, feeder protection in industrial and commercial switchgear