Electric motor 18,5 kW, 735 rpm, 400 V / 690 V, 4LC-225S-8 LV

When selecting a motor for continuous operation, it is sensible to opt for a solution that can handle high load without unnecessary losses and thereby reduce costs throughout its service life. The 4LC-225S-8 model with an output of 18.5 kW and operation in the range 700-750 rpm is designed precisely for situations where torque stability, sensible consumption and long-term reliability matter. In low-voltage systems, this low-voltage asynchronous electric motor can help in drive design so that significant operating cost savings are achieved without compromising durability.

In practice, this is a solution suitable as an energy-efficient industrial motor in segments where continuous load, repeated starts and sensitivity to overheating are expected. The design with a centre height of 225 mm and an all-cast-iron frame provides a solid foundation for assemblies that transmit vibrations into the frame or base. The noise level of 73 dB(A) supports smooth operation in technical rooms and production units where the motor is located close to operators or other equipment.

Power class for stable operation in the range 700-750 rpm

Rated speed of 735 rpm places this drive in a segment suitable for low-speed industrial applications with a requirement for smooth running without sudden dynamic changes. The starting torque ratio Tst/Tn 1.8 and the breakdown torque ratio Tmax/Tn 2 show that the motor is ready for sensible loading at start-up and during transient states. The starting current ratio Ist/In 8.1 also helps in the design of the switchboard, protective elements and power supply infrastructure.

Efficiency of 91.7 % and power factor of 0.75 are important values for operators who track the energy balance in long operating cycles. A motor with a supply of 400 V / 690 V can be included in several industrial schemes according to the available supply and method of connection. When designing the drive, it is also advantageous to use the rotor inertia value of 0.6 kg*m², as it helps when assessing starting with a mechanical load and when sizing control interventions.

Design solution for pumps, fans and compressors

The motor is designed for equipment where long bearing life and reliable mounting to the base are required. The DE bearing 6313-C3 and the NDE bearing 6313-C3 support shaft stability under the load typical of pumps, fans, compressors and larger technological units. The 2-M50X1.5 cable glands make practical connection easier in an industrial environment where robust cabling and service access are expected.

• Pumps benefit from stable speed when conveying liquids in production and utility systems.
• Fans use the balanced ratio of output and speed for continuous air flow.
• Compressors gain a reliable foundation for pressure cycles and repeated starts.
• Conveyor operations appreciate the constant power profile during continuous material transport.
• Mixing equipment uses stable torque when mixing viscous media.
• Machine assemblies with higher inertia benefit from a design prepared for longer loading.
• Process lines with lower rotating speed gain more precise adaptation of the drive to process conditions.
• Water supply systems appreciate operation with an emphasis on reliability and availability.
• HVAC units work with a motor that can withstand long operating intervals.
• Large industrial machines use torque reserve at start-up and when the load changes.
• Processing technologies have a drive suitable for demanding and predictable operation.
• The energy management of businesses can benefit from higher efficiency and lower losses.
• Pumping stations benefit from a robust design in environments with higher humidity.
• Ventilation assemblies gain a motor suitable for long-term reliable operation.

Accessories and temperature monitoring for safer operation

The motor includes 3 PTC thermistors, which help monitor the thermal condition of the winding and support protection in applications with higher load. This equipment is particularly practical where frequent starting, process fluctuation or reduced cooling of the surrounding area is expected. The package weight of 345 kg and package dimensions of 920*550*700 mm are important when planning transport, handling and installation in the service area.

If you are looking for a motor for pumps, fans, compressors or other large drives, this model from the professional VYBO Electric range offers a balanced combination of output, efficiency and robustness. If you need technical consultation for your specific project, send us a no-obligation enquiry and we will prepare a recommendation according to the operating conditions.