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ABB 1SDA073700R1 Low-Voltage Air Circuit Breaker

Product Description

Low-voltage air circuit breaker (ACB) for large-capacity low-voltage distribution systems, dedicated to main power supply protection, heavy-duty load switching, and fault isolation—key for large industrial plants, data centers, and high-power commercial complexes to ensure reliable power distribution and electrical safety.

Key Specs
- Rated Current (In): 1000A (frame size); rated breaking capacity (Icu): 85kA (415V AC, 50Hz).
- Voltage Rating: 415V AC (max operating voltage); 250V DC (auxiliary circuit).
- Protection Functions: Overcurrent (long-time/short-time/instantaneous, 5-100% In adjustable), earth fault protection (10-5000mA, selective tripping with time delay).
- Mechanical Life: ≥10,000 operations; electrical life (rated current): ≥2000 operations.
- Env: -5°C~+40°C, 5%-95% RH (non-condensing), IP30 (enclosed switchboard installation).
- Control & Operation: Manual/electric operating mechanism (remote control via Modbus optional); compatible with ABB Ekip Hi-T2 trip units for intelligent management.
Core Advantages
1. Ultra-high breaking capacity: 85kA at 415V AC handles severe short-circuit faults in 1000A large-capacity distribution systems (e.g., factory main power inlet).
1. Flexible protection adjustment: Wide-range overcurrent/earth fault settings adapt to mixed loads (motors + lighting + HVAC) in complex systems.
1. Large current carrying capacity: 1000A rated current supports high-power scenarios (e.g., multiple 200kW motors in heavy industry).
1. Advanced intelligent integration: Ekip Hi-T2 trip unit enables real-time current monitoring, fault waveform recording, and remote parameter setting.
Applications
- Main incoming circuit protection for heavy industrial plants (e.g., steel mills, petrochemical factories) with 1000A power demand.
- Core distribution protection in large data centers (supporting high-density server racks, 415V low-voltage system).
- Main switchboard protection for super-large commercial complexes (e.g., integrated shopping malls, exhibition centers) with multiple heavy-load circuits.
Precautions
1. Wiring: Main circuit use 185mm² copper cables; torque main terminals to 75-80N·m, auxiliary terminals to 8-10N·m—loose contacts may cause overheating.
1. Protection setting: Set long-time overcurrent to 1000A (full load); adjust short-time delay to 0.5-2s (avoid false tripping from motor starting current); set instantaneous current to 15×In for inductive loads.
1. Installation: Mount vertically in switchboards; reserve 25cm clearance above/below for heat dissipation and manual operation (prevents mechanical jamming).
1. Maintenance: Test trip function quarterly (manual + electric modes); inspect contact surface annually—replace if wear exceeds 30% of original thickness; clean arc-extinguishing chamber every 2 years.
1. Compatibility: Use only ABB-approved Ekip Hi-T2 trip units and accessories; non-certified parts may lead to protection failure or mechanical damage.

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