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F1S1250R1250PR13P

The code ABB F1S1250R1250PR13P defines a complete, integrated low-voltage switchgear functional unit (typically a single feeder or incoming compartment). It specifies the enclosure type and busbar rating (F1S1250), the main circuit breaker rating (R1250), and the type of circuit breaker with its key accessories (PR13P).

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Parameter Category Specification Assembly Type Low-Voltage Switchgear Functional Unit / Feeder Compartment Standard IEC 61439-1 & -2 Internal Separation Form 1 (F1) Busbar System • Rated Current (Ibm): 1250 A • Short-Time Withstand (Icw): ~ 35-50 kA for 1s (Design dependent) Main Protective Device • Type: ABB SACE Emax E1 Frame, Fixed-mounted Air Circuit Breaker (Fixed mounting implied by code structure; W would indicate draw-out). • Rated Current (In): 1250 A • Poles: 3 • Trip Unit: Electronic (PR1 series) with display. Likely provides LSI protection (Long-time, Short-time, Instantaneous). • Breaking Capacity (Icu): Typically 50 kA at 400V AC for this configuration. Key Breaker Features & Accessories • Fixed Mounting (Integrated into the panel). • Electronic Trip Unit with local interface. • Electric Spring-Charging Motor (auto-recharge). • Shunt Trip (MX) for remote opening. • Auxiliary Contacts (OF/SD) for remote status. • Undervoltage Release (MN) for safety trip on control power loss. Control Voltage The motor and releases require an auxiliary control supply (e.g., 110V/220V DC or 230V AC) – must be specified separately. Typical Physical Configuration This describes one vertical section in a modular switchboard (e.g., MNS Digital). It includes: • The fixed E1 breaker • Busbar connections • Cable connection chamber (likely bottom or rear) • Necessary internal barriers (Form 1) IP Rating (Enclosure) Typically IP31, IP41, or IP54 depending on the overall switchgear series.