Siemens 3UF5051-3AN00-1 Motor Protection Relay

Description

Siemens 3UF5051-3AN00-1 Motor Protection Relay

Product Dimensions：

The Siemens 3UF5051-3AN00-1 is a legacy, high-reliability SIMOCODE-DP Motor Protection and Control Device. It belongs to the first-generation SIMOCODE (SImatic MOtor COntrol and Diagnostic Electronic) system, designed to integrate motor management into automation systems via PROFIBUS DP.

Product Detailed Description

The 3UF5051-3AN00-1 serves as an intelligent electronic overload relay and control unit. Unlike traditional thermal overloads, it combines motor protection, control functions (such as direct-on-line, reversing, or star-delta starting), and fieldbus communication into a single compact module. It monitors the motor current via an external current transformer and communicates operational data back to a centralized PLC or SCADA system.

Technical Parameters

Product Advantages

• Integrated Control Logic: Pre-programmed control functions (like reversing starters or star-delta starters) reduce the amount of physical wiring and PLC code required.
• Comprehensive Diagnostics: Transmits detailed operational parameters (e.g., current levels, operating hours, fault messages) over PROFIBUS, reducing troubleshooting time.
• Precise Thermal Modeling: Electronic monitoring offers significantly more accurate motor protection than standard bi-metallic overload relays.
• Space-Saving Design: Replaces separate components like overload relays, control relays, and remote I/O modules into one integrated unit.

Important Considerations & Precautions

• Lifecycle Status: The 3UF5 series is a legacy/discontinued product line, succeeded by the modern SIMOCODE pro (3UF7) series. Availability may be limited to spare parts or refurbished units.
• Current Transformers: This module cannot measure motor current directly; it must be paired with the correct external 3UF18 current transformer matching your motor’s full-load amperage (FLA).
• Configuration Software: Configuration typically requires legacy software (such as Win-SIMOCODE-DP) or specific GSD files integrated into older STEP 7 projects.
• PROFIBUS Termination: Ensure proper bus termination resistors are activated at the physical ends of the PROFIBUS segment to maintain communication stability.

Product Applications

The 3UF5051-3AN00-1 is widely used in Motor Control Centers (MCC) across heavy industries:

• Chemical & Petrochemical: Controlling and protecting critical pump, agitator, and fan motors.
• Power Generation: Managing auxiliary motors for coal handling, cooling towers, and water feed systems.
• Water & Wastewater: Automation of high-power water pumps and aeration blowers.
• Mining & Materials: Protection for heavy-duty conveyor belts, crushers, and feeders.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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