Electric motor 315 kW, 1490 rpm, 400/690 V, 3LC-355L2-4

4-pole electric motor for stable torque in continuous operation

3LC PRO 3LC-355L2-4 is a 4-pole electric motor with a power output of 315 kW that delivers an ideal balance between purchase price and energy savings. In practice, this means a motor suitable for operations where not only power reserve but also long-term running costs of the entire line are monitored. A rated speed of 1490 rpm provides a stable operating point for pumps, conveyors and technological units that need smooth starting and reliable torque.

IE3 efficiency class reduces unnecessary losses under normal load and helps keep consumption under control even in equipment with long operating times. For medium-sized businesses and large factories, it is a solution reflected in energy bills without requiring compromises in drive design. In drive technology, this difference becomes evident in the annual balance very quickly.

A robust cast-iron frame is designed for applications where the motor operates under vibration, dust or frequent starts. Reinforced cast-iron bearing shields and reinforced cast-iron feet improve assembly rigidity, which is important both for precise mounting on the machine frame and for long-term operation under higher mechanical loads. Engineers and designers value this solution when they need to install the motor in equipment without additional modifications to the base.

IE3 motor for production where operational reliability is decisive

This IE3 electric motor draws on experience from plants where every shutdown interval and every percentage point of efficiency matters. A power factor of 0.9 supports power-supply design in 400/690 V systems, and industrial integration is easier even when connecting to existing switchgear. Rated current of 526 A at △ 400V and 304.93 A at Y 690V gives designers a precise basis for sizing protective devices, cables and starting circuits.

A starting torque ratio LRT/RLT of 2 and breakdown torque ratio BDT/RLT of 2.2 provide reserve when starting loaded technologies. A starting current ratio LRA/RLA of 7.1 is important when designing network protection and assessing voltage drops in facilities with several large loads. Rotor inertia of 9.143 kg/m² helps when calculating drive dynamics, particularly where the mass of the conveyed medium changes or the motor is coupled to a unit with higher inertia.

Construction that supports long service intervals

6322-C3 bearings on both the DE and NDE sides are selected for high loads and precise rotation in industrial operation. Cable glands 2-M63X1.5 simplify robust connections in environments where power cables must be routed without unnecessary improvisation. A noise level of 95 dB(A) corresponds to the power class and should be considered when designing installation in separate machine rooms or enclosed units.

The 3LC PRO 3LC-355L2-4 has a packaged weight of 1794 kg and package dimensions of 1607*822*1161 mm, so handling by crane or suitable lifting equipment should be planned. For maintenance and inventory planning, it is an advantage that the motor is based on a solution proven in thousands of industrial installations, allowing service teams and spare parts to build on established practice rather than experimentation.

Applications for conveyors, pumps and technological units

Thanks to its parameters and mechanical design, the motor is suitable for the following specific applications:

• Main belt conveyors in aggregate sorting lines.
• Screw conveyors with continuous transfer of bulk materials.
• Centrifugal pumps in water treatment and process circuits.
• Process agitators in chemical production.
• Ventilation units for large industrial halls.
• Exhaust fans in drying lines.
• Compressor stations in energy and manufacturing.
• Mills for mineral processing.
• Crushers in quarrying and recycling industries.
• Briquetting presses for dense materials.
• Extruders in polymer processing.
• Winding and unwinding units in strip production.
• Rotary screens in food and chemical filtration.
• Process mixing stations in the paper industry.

Power distribution and sizing for 400/690 V

When designing a connection in a 400/690 V system, it is important to combine rated current, protection and starting strategy with the actual load profile. This three-phase electric motor is therefore suitable for projects where not only rated power but also real operating dynamics and subsequent maintenance are considered. For designers, it provides a practical foundation for building a stable and serviceable drive.

If you need a motor that fits into production with an emphasis on energy efficiency, mechanical durability and long-term operation, take advantage of the 3LC PRO 3LC-355L2-4 offer. IE3 efficiency class helps keep operating costs under control even in applications with high utilisation throughout the year.