Three-phase electric motor: 3LC-355M2-4, 250 kW
| Basic technical data | |
| Motor type | 3LC-355M2-4 |
| Rated power (kW) | 250 |
| Frame size (mm) | 355 |
| Number of poles | 4 |
| Rated speed (rpm) | 1490 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 418 |
| Rated current 690 V (A) | 242,32 |
| Efficiency at 100% load (%) | 96 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,9 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 2 |
| Breakdown torque ratio (BDT/RLT) | 2,2 |
| Locked-rotor current ratio (LRA/RLA) | 7,1 |
| Rotor moment of inertia (kg·m²) | 7,248 |
| Applicable standards | |
| Specification | IEC60034-1 |
| Testing | IEC60034-2 |
| Noise | IEC60034-9 |
| Vibration | IEC60034-14 |
| Construction and operating data | |
| Mounting arrangement | IM B3, B5, B35, V1 |
| Duty type | S1 (S2, S3, S4 – S9 optional) |
| Load type | Parabolic or linear curve |
| Degree of protection | IP55 |
| Insulation class | F |
| Temperature rise class | B |
| Cooling method | IC411 |
| Starting method | DOL, VFD, soft starter |
| Direction of rotation | Both |
| Vibration (mm/s) | 2.8 |
| Cable glands | 2-M63X1.5 |
| Operating conditions | |
| Ambient temperature range | -20 to +40°C (-30, +50, +60 optionally) |
| Maximum installation altitude | up to 1000m |
| Packaging and dimensions | |
| Packaging dimensions (mm) | 1607*822*1161 |
| Package weight (kg) | 1450 |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
Stable operation, lower losses and reliability in long-term use make the 3LC-355M2-4 a solution that delivers efficiency and value in demanding operations. This 1500 rpm electric motor is intended for applications where not only performance but also operating costs, available starting torque and smooth operation under variable load are monitored.
1500 rpm electric motor for smooth operation of production lines
A rated power output of 250 kW and rated speed of 1490 rpm give this electric motor reserve capacity for technologies operating in multi-shift regimes. IE3 efficiency class supports economical operation under normal load and in practice helps reduce energy costs wherever long daily operating hours are decisive. A power factor of 0.9 improves utilisation of the power network in stable industrial assemblies.
The asynchronous electric motor is suitable for machine assemblies that require a durable solution with straightforward servicing. Industrial automation places emphasis on predictable starting, repeatable behaviour and easy integration into existing switchgear, all of which this type of drive supports in normal production practice.
Robust cast-iron frame for heavy industrial use
A robust cast-iron frame increases the durability of the assembly under vibration, impact loads and long-term operation. Reinforced cast-iron bearing shields and reinforced cast-iron feet help maintain mounting rigidity even when installed on massive base frames. This design is particularly appreciated by medium-sized businesses and large factories where reliable performance without frequent maintenance intervention is expected from the drive.
A noise level of 95 dB(A) must be taken into account when designing the workplace and installing the motor in technological halls. Rotor inertia of 7.248 kg/m² supports balanced operation in applications with higher mechanical loads and frequent operating changes.
Starting and load control in demanding operations
A starting torque ratio of 2 and breakdown torque ratio of 2.2 provide useful behaviour when starting under load. A starting current ratio of 7.1 helps designers size protective devices and select downstream control systems in industrial automation. Rated current at △ 400V is 418 A and rated current at Y 690V is 242.32 A, making it easier to adapt the motor to the facility’s voltage system.
Power supply and connection for practical maintenance
A 400/690 V supply provides greater flexibility when designing the motor into different production segments. Cable glands 2-M63X1.5 simplify cable entry when installing the motor in robust equipment, while DE bearing 6322-C3 together with NDE bearing 6322-C3 support a predictable service strategy. In this electric motor, the manufacturer builds on years of experience reflected in a design suited to long operating cycles.
Specific solution for conveyors, pumps and machine assemblies
This model is suitable for the following specific applications:
- Main conveyor lines in metallurgical production.
- Process-water pumping stations in factories.
- Compressor assemblies for central compressed-air distribution.
- Mills for processing bulk raw materials in cement plants.
- Extruders for plastics-processing facilities.
- Aggregate crushers in quarrying technology.
- Ventilation units for large industrial halls.
- Winches and drum drives in steelworks handling equipment.
Logistics and installation with large workshops in mind
A packaged weight of 1450 kg and package dimensions of 1607*822*1161 mm must be considered during receiving, storage and transfer to the installation area. These dimensions require prepared handling equipment and suitable service access. If you need a solution for industrial operation, order the 3LC-355M2-4 in good time so you can follow the planned shutdown schedule without unnecessary delays.