ABB S282-UCK10 miniature circuit breaker

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ABB S282-UCK10 Miniature Circuit Breaker

Core Product Features

• Dual Protection Functions: Provides overload protection (via thermal release) and short-circuit protection (via magnetic release). The thermal release triggers tripping when current exceeds the rated value for a sustained period (e.g., 1.45× rated current), while the magnetic release acts instantly (≤0.1s) under short-circuit conditions (≥10× rated current) to cut off the circuit.
• Compact Design: Adopts a narrow-width housing (18mm per pole) to save space in distribution boxes, supporting multi-pole combination (compatible with 1P/2P/3P/4P configurations of the S280 series) for flexible circuit layout.
• Easy Operation & Identification: Features a clear toggle switch (ON/OFF marked) for intuitive status checking; the switch position (up for "ON", down for "TRIPPED/OFF") helps quickly identify fault states. It also supports direct manual operation for circuit isolation during maintenance.

Key Parameters

• Pole Configuration: 2P (two-pole, for line and neutral protection in single-phase 230V AC circuits).
• Rated Current (In): 10A (matches low-power load scenarios, e.g., control cabinet auxiliary circuits, small motors).
• Rated Voltage (Ue): 230/400V AC (compatible with single-phase 230V and three-phase 400V low-voltage systems).
• Breaking Capacity (Icu): 10kA at 400V AC (capable of safely interrupting short-circuit currents in most industrial/commercial low-voltage networks).
• Protection Curve: C-curve (trips at 5-10×In, suitable for resistive and inductive loads like lighting, small motors, and control circuits).
• Mechanical Specs: 18mm (width) × 85mm (height) × 65mm (depth); DIN rail-mounted (35mm standard), compatible with ABB S280 series accessories (e.g., auxiliary contacts, shunt trips).

Core Advantages

• Reliable Safety Performance: Complies with IEC 60898-1 and GB 10963.1 standards; the thermal-magnetic dual release ensures accurate protection against both slow overloads and sudden short circuits, avoiding equipment damage or fire risks.
• Space-Saving: The 18mm narrow width allows more breakers to be installed in limited distribution box space—critical for dense wiring scenarios (e.g., industrial control cabinets with multiple auxiliary circuits).
• Versatile Compatibility: Works with ABB’s S280 series accessories (e.g., S2C-AUX auxiliary contacts for remote status monitoring, S2C-SHT shunt trips for remote tripping), expanding functional adaptability to complex systems.

Typical Applications

• Industrial Control Cabinets: Protects auxiliary circuits (24V DC power supplies, sensor wiring, and module power inputs) in ABB automation control cabinets, preventing faults from spreading to core control components.
• Commercial Electrical Systems: Used in office buildings, shopping malls, and data centers to protect lighting circuits, air conditioning terminal units, and small office equipment (printers, servers) from overloads/short circuits.
• Small-Power Industrial Equipment: Guards single-phase small motors (e.g., 0.75kW fans, 1.5kW water pumps) and electrical heating equipment, ensuring safe operation of low-power production auxiliary devices.

Usage Precautions

• Selection: Match the rated current (10A) to the actual load current (do not use for loads >10A); confirm the protection curve (C-curve) is suitable for the load type (avoid using for highly inductive loads like large motors, which require D-curve breakers).
• Installation: Mount on a flat, clean DIN rail; ensure correct wiring (line terminal "L" connected to incoming power, load terminal "N" to outgoing circuit) to prevent reverse connection. Tighten terminal screws with torque 1.2-1.5N·m to avoid poor contact and overheating.
• Maintenance: Regularly check the toggle switch status (ensure no looseness); test the tripping function annually (via ABB test tools or by simulating overload conditions) to verify protection effectiveness. Replace the breaker immediately if it trips frequently without overload (indicating internal damage).

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