Detailed Technical Data Sheet for Used Electric Motor - Schneider Motortyp: ExRDM 3913/50 NEa

General Overview

Schneider ExRDM 3913/50 NEa electric motor is an industrial device designed for applications in potentially explosive environments, classified as Ex d IIC T4 Gb according to ATEX regulations. This motor was manufactured in 2015 and is suitable for use in potentially explosive atmospheres. Although it is an unused motor, it is considered used due to the time elapsed since production and storage conditions. It is stored in its original packaging, which guarantees its integrity.

Technical Specifications

• Brand: Schneider
• Model: ExRDM 3913/50 NEa
• ATEX Certification: PTB 11 ATEX 1042 X
• ATEX classification: Ex d IIC T4 Gb
• Protection Index (IP): IP 44
• Power supply: 230 VAC
• Rated Current (IN): 1.6 Arms
• Rated Torque (Mn): 580 Ncm
• Maximum Operating Temperature: 130°C (equipped with PTC according to DIN 44082)
• Service Type: S1 (continuous operation), S6 (periodic operation)
• Inrush Current: 4.8 Arms
• Year of Construction: 2015
• Weight and Dimensions: Varies depending on configuration, with an average weight around 15-20 kg.
• Bauart: II 2 G (category 2 for gas, suitable for zone 1 and 2)

Main Components

• Stator and Rotor: Electromagnetic components that allow the conversion of electrical energy into mechanical energy. The rotor is generally mounted on ball bearings to reduce friction and extend the life of the motor.

• External Case: Made of shock-resistant and heat-resistant material, with IP44 protection grade, which protects the motor from dust and splashes of water.

• PTC (Positive Temperature Coefficient): Thermal sensor that stops the engine from operating if it overheats, protecting it from permanent damage.

• Terminal Block: Connection point for the electrical power supply, with safe, insulated connections to ensure reliable operation.

Mechanical Features

• High Torque: The motor provides a rated torque of 580 Ncm, sufficient for applications requiring consistent and reliable force.

• Operating Temperature: Designed to operate in hot environments up to 130°C, thanks to the integrated thermal protection that ensures reliability in critical conditions.

• ATEX Classification: Suitable for use in hazardous areas (Zone 1 and 2), the motor is protected against internal explosions that could ignite surrounding explosive atmospheres.

Optimal Usage Parameters

To calculate and verify the optimal functioning of the engine, different formulas can be used:

1. Mechanical Power Output (P):

   $$P$$

   Where:

   • PP $P$ is the power in kW,
   • TT $T$ is the torque in Ncm,
   • ω\omega $\omega$ is the angular velocity in rpm.

2. Efficiency (η):

   $$\eta$$

   Where:

   • PoutP_{out} $P$ o u t ​is
   • PinP_{in} $P$ in ​is

3. Starting Current (I_start):

   $$I$$

   Where kk $k$ is the typical multiplication factor for induction motors (generally 6-7 times the rated current).

Workable Materials and Applications

The engine is suitable for use in various sectors, especially those with stringent safety requirements such as:

• Chemical and petrochemical industry: To operate pumps, compressors and other machinery in areas with explosion hazards.
• Painting plants: Where the atmosphere may be charged with flammable vapours.
• Power plants: In environments where flammable gases are present.

Maintenance

• Regular Bearing Check: Lubricate periodically and replace if necessary to avoid excessive vibration.

• Inspecting Cables and Terminals: Check for signs of wear or corrosion, especially for use in harsh environments.

• External Cleaning: Keep the external case free of dust and debris that may impair heat dissipation.

Used Appraisal

To determine the quality of a used engine:

• Check Physical Integrity: Check for visible damage to the case and terminals.
• Operational Test: Perform a start-up and operation test to check for smooth operation and the absence of abnormal noises.
• Document Control: Ensure ATEX certification and other compliance documents are available and valid.

Sectors of Use

The Schneider ExRDM 3913/50 NEa motor is ideal for:

• Oil and gas industry
• Chemistry and pharmaceuticals
• Shipbuilding
• Energy production

Why is it worth buying used?

Purchasing a used electric motor, especially one that has never been used and is still in its original packaging, represents an opportunity to reduce investment costs without compromising quality and reliability. The robustness and technical specifications of the Schneider ExRDM motor make it an excellent choice for those requiring a device certified for hazardous environments but wishing to avoid the high cost of a new product.

Conclusion

The Schneider ExRDM 3913/50 NEa motor is a high-quality component, suitable for applications in potentially explosive industrial environments. Buying a used one can offer excellent value, especially considering its robustness and ATEX certification, which ensure reliability in critical environments.