Siemens 2.5-4A Overload Relay 3UA55 00-1E

Siemens 2.5-4A Overload Relay 3UA55 00-1E

The Siemens 3UA55 00-1E is a thermal overload relay designed to provide reliable protection for electrical motors operating within a current range of 2.5 to 4 amperes. This relay is engineered to safeguard motors against overload conditions, ensuring operational safety and longevity.

Key Features

• Current Range: Adjustable between 2.5 to 4A, accommodating various motor requirements.
• Compatibility: Specifically designed for seamless integration with Siemens 3TF44, 3TF45, 3TF34, and 3TF35 contactors.
• Protection Class: Conforms to Class 10A, offering precise and timely response to overload conditions.
• Phase Failure Protection: Equipped to detect and respond to phase loss, preventing potential motor damage.
• Reset Mechanism: Features a manual reset function, allowing operators to restore operations after addressing the overload cause.
• Trip Indicator: Includes a green trip indicator for clear visual status of the relay.
• Test Functionality: Incorporates a red test button to verify relay operation without actual overload conditions.

Technical Specifications

• Rated Insulation Voltage (Ui): 690V
• Rated Impulse Withstand Voltage (Uimp): 6kV
• Permissible Service Temperature: -25°C to +55°C
• Mounting: Direct mounting onto compatible contactors
• Conductor Cross-Section:
  • Solid or stranded: 2.5 to 6 mm²
  • Finely stranded with end sleeve: 1.5 to 4 mm²
• Terminal Screw: M4
• Power Loss per Pole:
  • Minimum setting: 0.9W
  • Maximum setting: 2.25W

Applications

The 3UA55 00-1E overload relay is ideal for protecting motors in various industrial applications, including manufacturing processes, conveyor systems, and other machinery requiring dependable overload protection within the specified current range.

Installation and Maintenance

Installation is straightforward, with the relay designed for direct mounting onto compatible Siemens contactors. Regular maintenance involves periodic testing using the built-in test button and monitoring the trip indicator to ensure optimal performance.

By integrating the Siemens 3UA55 00-1E overload relay into your motor control systems, you enhance the protection and reliability of your equipment, minimizing downtime and extending the lifespan of your motors.