1. Overview

2. Key Technical Parameters

3. Product Features and Advantages

• Dual Thermal-Magnetic Protection: Integrates thermal protection (to prevent overload) and magnetic protection (to prevent short circuits), enabling long-term and instantaneous current interruption.
• Compact Structure: Adopts a molded case design with a relatively light weight (approximately 33 lbs), making it easy to install in distribution boxes or panels.
• High Interrupting Capacity: The 10kA interrupting capacity can quickly cut off current in the event of a circuit fault, preventing damage to electrical equipment.
• Standardized Design: Complies with international IEC standards, suitable for the global market, and equipped with standardized incoming and outgoing terminals.

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4. Structure and Composition

• Enclosure: Plastic enclosure that provides physical protection and a certain degree of insulation performance.
• Thermal-Magnetic Trip Unit: The core protection component, including a bimetallic strip (thermal trip) and an electromagnetic coil (magnetic trip).
• Pole: Metal terminals used to connect power lines and load lines, usually fixed with bolts or screws.
• Contacts: The conductive part of the circuit breaker, including main contacts and auxiliary contacts, used to connect or disconnect the circuit.
• Fuse: Some models may be equipped with fuses to provide additional protection in extreme cases.

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5. Typical Application Fields

• Industrial Automation Control Systems: Protect the power supply lines of equipment such as motors, frequency converters, and sensors.
• Power Distribution Systems: Used in distribution panels of commercial buildings or industrial plants to protect branch circuits.
• Motor Control Center (MCC): Protect circuits of small motors (such as those below 100A).
• Power System Supporting: Used as an auxiliary circuit breaker to protect relays, capacitor banks, etc.

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6. Installation and Maintenance

Installation Recommendations

• Check Pole Spacing: Ensure that the pole spacing of the installation panel or distribution box meets the 1″ standard.
• Correct Wiring: Pay attention to distinguishing between line (incoming) and load (outgoing) terminals to avoid reverse connection, which may lead to protection failure.
• Secure Fixation: Use bolts or screws to fix the circuit breaker in the distribution box to ensure it does not loosen in a vibrating environment.

Maintenance Recommendations

• Regular Inspection: Regularly check the tightness of terminal bolts to prevent loosening caused by vibration or thermal expansion and contraction.
• Clean the Enclosure: Keep the enclosure clean to prevent dust accumulation from affecting heat dissipation.
• Test Trip Function: During planned shutdown maintenance, a tester can be used to test the thermal-magnetic trip unit to ensure its sensitivity meets the standard.
• Replacement Indication: If the circuit breaker trips frequently, it may be due to line overload; check the load or replace the circuit breaker with a higher current rating.