Siemens 3UA7021-14 Overload Relay (5-8A)
The Siemens 3UA7021-14 is a thermal overload relay designed to provide reliable protection for electrical motors and circuits operating within a current range of 5 to 8 amperes. This device safeguards equipment by detecting and responding to overcurrent conditions, thereby preventing potential damage due to overloads or phase failures.
Key Features
- Adjustable Current Range: The relay offers a setting range from 5 to 8A, allowing precise calibration to match specific motor requirements.
- Auxiliary Contacts: Equipped with one normally open (NO) and one normally closed (NC) auxiliary contact, facilitating integration into control circuits.
- Phase Failure Protection: Designed to detect phase loss, ensuring comprehensive motor protection.
- Manual and Automatic Reset: Provides flexibility with both manual and automatic reset options to suit various operational needs.
- Compliance: Meets international standards, including IEC 60947 and VDE 0660, ensuring reliability and safety in diverse applications.
Technical Specifications
- Operational Voltage: Up to 690V AC.
- Tripping Class: Class 10A, offering timely response to overload conditions.
- Mounting: Designed for direct mounting onto compatible Siemens contactors, ensuring seamless integration.
- Operating Temperature: Suitable for environments with temperatures ranging from -20°C to +60°C.
- Dimensions: Compact design facilitating easy installation in control panels.
Applications
The Siemens 3UA7021-14 overload relay is ideal for protecting motors in various industrial applications, including:
- Pumps
- Fans
- Conveyors
- Compressors
- Machine tools
Its robust design and reliable performance make it a preferred choice for ensuring motor longevity and operational safety.
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