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ABB 1SDA073687R1 Low-Voltage Air Circuit Breaker

Product Description

Low-voltage air circuit breaker (ACB) for medium-to-large capacity low-voltage distribution systems, specializing in main power inlet protection, heavy load switching, and fault isolation—critical for industrial parks, large factories, and high-power commercial facilities to ensure stable power supply and electrical safety.

Key Specs

Rated Current (In): 800A (frame size); rated breaking capacity (Icu): 65kA (415V AC, 50Hz).

Voltage Rating: 415V AC (max operating voltage); 250V DC (auxiliary circuit).

Protection Functions: Overcurrent (long-time/short-time/instantaneous, adjustable thresholds), earth fault protection (20-5000mA, selective tripping).

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 optional); compatible with ABB Ekip Hi-T trip units for intelligent monitoring.

Core Advantages

Higher breaking capacity: 65kA at 415V AC handles severe short-circuit faults in high-capacity distribution systems (e.g., 800A main circuits).

Precise protection: Adjustable overcurrent/earth fault settings support selective tripping, avoiding large-area power outages.

High current adaptability: 800A rated current meets heavy load demands (e.g., multiple large motors in factories).

Intelligent expansion: Ekip Hi-T trip unit compatibility enables real-time data logging, fault analysis, and remote monitoring.

Applications

Main incoming circuit protection for large manufacturing plants (800A power inlet, 415V low-voltage system).

Power distribution protection in industrial parks to isolate zone-level faults without affecting other areas.

High-power commercial facility (e.g., large shopping malls, hotels) main switchboard protection, supporting multiple heavy-load circuits.

Precautions

Wiring: Main circuit use 150mm² copper cables; torque main terminals to 60-65N·m, auxiliary terminals to 8-10N·m to avoid contact overheating.

Protection setting: Match long-time overcurrent setting to actual load current (e.g., 800A for full-load operation); set instantaneous current to 12×In for motor-dominated loads.

Installation: Mount vertically in switchboards; reserve 20cm clearance above/below for heat dissipation and manual operation space.

Maintenance: Test trip function quarterly (both manual and electric modes); inspect contact surface annually—polish minor oxidation, replace if contact wear exceeds 40% of original thickness.

Compatibility: Only use ABB-certified trip units (e.g., Ekip Hi-T) and accessories; non-approved parts may cause protection failure or mechanical jamming.

The structure and details of the product：

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