Siemens 3UB8123-4CW2 ESP200 3-12A Solid State Overload Relay 48ATC3S00

Siemens 3UB8123-4CW2 ESP200 Solid State Overload Relay

The Siemens 3UB8123-4CW2 ESP200 is a solid state overload relay designed to provide reliable motor protection in industrial applications. With a current range of 3 to 12 amps, this device ensures optimal performance and safety for three-phase motors.

Key Features

• Adjustable Trip Classes: Selectable trip classes of 5, 10, 20, or 30 via DIP switches, accommodating various starting conditions and reducing inventory needs.
• Phase Loss and Unbalance Protection: Rapid response to phase loss within 3 seconds and phase unbalance based on selected trip class, minimizing motor heating and potential damage.
• Ground Fault Detection: Trips at 60% of motor current, offering protection against high-resistance short circuits or ground faults caused by moisture or insulation damage.
• Visible Trip Indicator: Facilitates quick identification of overload trips, enhancing maintenance efficiency.
• Ambient Insensitivity: Operates reliably across a wide temperature range (-25 to 65°C), preventing nuisance tripping due to environmental changes.
• Self-Powered Operation: Eliminates the need for external power sources, simplifying installation and reducing costs.
• Wide Full Load Amperage (FLA) Adjustment: Offers a 4:1 adjustment ratio, providing flexibility and reducing the need for multiple relay models.
• Short Circuit Protection: When used with appropriate fuses or motor starter protectors, it withstands short circuits without requiring heater replacement.
• Test Functionality: Includes a test button to verify electronic functions and trip mechanisms, ensuring system readiness.
• Thermal Memory: Prevents motor restart when it is still hot, safeguarding against premature failures.
• Conformally Coated Circuit Board: Enhances resistance to environmental conditions, extending the relay’s lifespan.
• Standard Contacts: Equipped with 1 Normally Open (NO) and 1 Normally Closed (NC) contact, rated B600 and R300, facilitating easy integration into control circuits.
• Repeat Accuracy: Maintains accuracy within 1%, ensuring precise protection settings and reducing nuisance tripping.
• Removable Terminal Block: Allows for easy replacement without disconnecting wires, saving time during maintenance.
• Reset Options: Offers both manual and automatic reset functions, with automatic reset occurring 3 minutes after tripping, allowing the motor to cool down before restarting.
• Remote Reset Capability: Supports electrical remote reset by applying 24 VDC to designated terminals, providing flexibility in system design.
• Touch-Safe Terminals: Designed to protect against accidental contact with live circuits, enhancing operator safety.

Specifications

• Current Range: 3 to 12 A
• Mounting Type: Direct or stand-alone
• Terminal Type: Screw terminals
• Operating Temperature: -25 to 65°C
• Dimensions: Approximately 2.12 inches in height

The Siemens 3UB8123-4CW2 ESP200 solid state overload relay combines advanced protection features with user-friendly design, making it an ideal choice for safeguarding motors in diverse industrial environments.