With increasing emphasis on equipment reliability and operational safety, ABB overload relays play a critical role in protecting electric motors from overload, phase loss, and prolonged overcurrent conditions. These relays are engineered to work seamlessly within motor control panels, ensuring consistent performance and extended motor life. With precise current sensing and dependable trip characteristics, these devices support uninterrupted industrial operations across varied applications.
Operating Principle:
Based on thermal or electronic sensing mechanisms, the relay continuously monitors motor current during operation. When current exceeds preset limits for a defined duration, the relay activates a trip mechanism that disconnects the motor circuit. This controlled response prevents overheating and insulation damage. With adjustable current settings and reset options, protection can be tailored to match specific motor ratings and duty cycles.
Design and Construction:
Protection Functions:
Application Scope:
These overload relays are widely used in motor starters, pumps, compressors, conveyors, fans, and HVAC systems. With compatibility across low-voltage motor control systems, they support manufacturing plants, infrastructure projects, and process industries.
Operational Advantages:
By integrating these relays into control systems, industries enhance motor safety, operational continuity, and long-term equipment performance.
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