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

General Overview

The Schneider ExRDM 3913/50 NEa is an industrial device designed for applications in explosive environments, classified as Ex d IIC T4 Gb according to ATEX regulations. This engine was built in 2015 and is suitable for use in potentially explosive atmospheres. Although it is a never-used engine, it is considered used due to the time since production and storage conditions. It is stored in its original box, which guarantees its integrity.

Technical Specifications

• Brand: Schneider
• Model: ExRDM 3913/50 NEa
• ATEX certification: PTB 11 ATEX 1042
• ATEX classification: Ex d IIC T4 Gb
• Protection Index (IP): IP 44
• Power supply: 230 VAC
• Rated Current (IN): 1.6 Arms
• Nominal torque (Mn): 580 Ncm
• Maximum Operating Temperature: 130°C (equipped with PTC according to DIN 44082)
• Type of Service: S1 (continuous operation), S6 (periodic operation)
• Starting Current: 4.8 Arms
• Year of Construction: 2015
• Weight and Dimensions: They vary depending on the 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- and heat-resistant material, with IP44 protection rating, which protects the motor from dust and splashes of water.

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

• Terminal block: Connection point for the electrical supply, with secure and insulated connections to ensure reliable operation.

Mechanical Characteristics

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

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

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

Optimal Use Parameters

To calculate and verify the optimal operation of the engine, various formulas can be used:

1. Mechanical Power Delivered (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 motor is suitable for use in various industries, especially those with stringent safety requirements such as:

• Chemical and petrochemical industry: To operate pumps, compressors and other machinery in areas with risk of explosions.
• Painting plants: Where the atmosphere may be laden with flammable vapours.
• Power plants: In environments with the presence of flammable gases.

Maintenance

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

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

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

Evaluation of used cars

To determine the quality of a used engine:

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

Sectors of Use

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

• Oil and gas industry
• Chemical and pharmaceutical
• Naval construction
• Energy production

Why is it better to buy it used?

Purchasing a used electric motor, especially one that has never been used and stored 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 who need a device certified for hazardous environments, but want 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 industrial environments with risk of explosion. Buying used can offer excellent value for money, especially considering the robustness and ATEX certification which guarantee its reliability in critical contexts.