3RN1010-2BB00

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The Siemens 3RN1010-2BB00 is a thermistor motor protection relay designed to safeguard motors from overheating, ensuring optimal performance and longevity. This standard evaluation unit features an auto-reset function and operates with a dual AC/DC 24V control supply voltage. It is equipped with spring-loaded terminals for secure and efficient electrical connections.

With a single measuring circuit and two change-over switches for auxiliary contacts, this device can measure temperatures ranging from 60°C to 180°C. The compact design, with dimensions of 22.5mm in width, 94mm in height, and 91mm in depth, allows for easy integration into various control systems. The 3RN1010-2BB00 is also characterised by its robust construction, with an IP20 protection class, ensuring durability in diverse operating environments.

This product is suitable for a wide range of industrial applications where precise motor temperature monitoring is critical. Its self-resetting capability streamlines operations by reducing manual intervention, while the absence of reclosing interlock and defect storage features simplifies the device's functionality. The relay is designed to operate reliably within an ambient temperature range of -25°C to +60°C, making it versatile for use in different climatic conditions.

The 3RN1010-2BB00 is compliant with general product approvals and EMC standards for use in hazardous locations, reflecting its adherence to high-quality and safety standards. This makes it an essential component for engineers and technicians looking to enhance motor protection in their systems.
Specification Description
Part Number 3RN1010-2BB00
Alternative Part Number 3RN10102BB00
Manufacturer Siemens
Type of Voltage AC/DC
Supply Voltage Frequency 50/60 Hz
Control Supply Voltage (AC at 50 Hz) 24 V
Control Supply Voltage (AC at 60 Hz) 24 V
Control Supply Voltage (DC) 24 V
Number of Measuring Circuits 1
Number of Change-over Switches 2
Measurable Temperature Initial Value 60 °C
Measurable Temperature Final Value 180 °C
Product Function Self-reset Yes
Ambient Operating Temperature -25 … +60 °C
Mechanical Design Spring-loaded terminals
Type of Display LED
Protection Class IP20
Width 22.5 mm
Height 94 mm
Depth 91 mm
Approvals General Product Approval, EMC, For use in hazardous locations, Test Certificates, Declarations

What is the function of this thermistor motor protection unit?

This thermistor motor protection unit is designed to safeguard motors from overheating by monitoring the temperature via connected thermistors and interrupting the circuit if an overtemperature condition is detected.

Can this device be used with both AC and DC control supply voltages?

Yes, the unit is versatile and can be used with a control supply voltage of 24V for both AC and DC applications.

What is the temperature range that can be measured by this unit?

The measurable temperature range for this unit starts at 60°C and goes up to 180°C, allowing for a wide range of motor protection applications.

Does this unit feature an auto-reset function?

Yes, the unit comes with an auto-reset function, which allows it to automatically reset after a fault condition has been cleared.

What type of terminals does this unit have for electrical connections?

The unit is equipped with spring-loaded terminals for quick and secure electrical connections.

What is the ambient operating temperature range for this device?

The ambient operating temperature range for this device is from -25°C to +60°C, ensuring reliable operation in a variety of environmental conditions.

How many measuring circuits does this protection unit support?

This protection unit supports one measuring circuit, allowing for the connection of a single thermistor.

What is the width of this thermistor motor protection unit?

The width of the unit is 22.5 mm, making it compact and suitable for installation in tight spaces.

Is there a manual override or external reset function available?

No, this model does not have a manual override or external reset function. It is designed to automatically reset after the fault condition is resolved.

What type of protection class does this unit have?

The unit has a protection class of IP20, indicating that it is protected against solid objects larger than 12.5 mm but not against water.

  • Monitoring and protection of motors against overheating
  • Integration into motor control circuits for thermal overload protection
  • Utilisation in HVAC systems to safeguard fan motors
  • Implementation in pump control systems to prevent thermal overload
  • Application in conveyor systems to monitor motor temperature
  • Use in manufacturing automation for protecting machinery with thermistor-equipped motors
  • Deployment in control panels for industrial machinery to ensure motor safety
  • Installation in automotive manufacturing equipment for motor temperature monitoring
  • Inclusion in packaging machinery to prevent motor overheating during continuous operation
  • Embedding in plastic and rubber processing machinery for thermal protection of motors

This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.

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