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ABB S272H Circuit Breaker (Concise Version)

I. Product Positioning

II. Core Specifications

III. Core Functions

1. Overload Protection: The bimetallic strip bends when heated, triggering delayed tripping (to avoid false tripping caused by temporary overloads such as motor startup) and protecting circuits from overheating damage.
2. Short-Circuit Protection: The electromagnetic coil acts instantaneously (<0.1s) to cut off short-circuit currents within 10kA, preventing equipment burnout or arc hazards.
3. Status Visualization: Clear ON (green)/OFF/Tripped (red) positions for quick distinction between "normal shutdown" and "fault-induced tripping".

IV. Typical Applications

• Industrial Equipment: Protects power circuits of small motors and PLC control cabinets;
• Commercial Scenarios: Two-phase loads such as air conditioners and fans in shopping malls/offices;
• Mechanical Systems: Local power distribution protection for packaging machines, assembly lines, etc.

V. Usage Notes

1. Select the model based on load current (e.g., a 1.5kW motor requires a 10A model), and do not use it beyond the rated current;
2. Distinguish between "LINE (incoming line)" and "LOAD (outgoing line)" during wiring—reverse connection will render protection ineffective;
3. After tripping, troubleshoot the fault (e.g., short circuit, overload) and reset before closing the breaker again.

The structure and details of the product：

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