Three-phase electric motor: 3LC-280S-2, 75 kW
| Basic technical data | |
| Motor type | 3LC-280S-2 |
| Rated power (kW) | 75 |
| Frame size (mm) | 280 |
| Number of poles | 2 |
| Rated speed (rpm) | 2980 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 400/690 |
| Connection | △/Y |
| Rated current 400 V (A) | 127 |
| Rated current 690 V (A) | 73,62 |
| Efficiency at 100% load (%) | 94,7 |
| Efficiency class | IE3 |
| Power factor at 100% load | 0,9 |
| Starting and torque characteristics | |
| Locked-rotor torque ratio (LRT/RLT) | 1,8 |
| Breakdown torque ratio (BDT/RLT) | 2,3 |
| Locked-rotor current ratio (LRA/RLA) | 7,1 |
| Rotor moment of inertia (kg·m²) | 1,0889 |
| 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) | 1102*652*846 |
| Package weight (kg) | 517 |
| Bearings and lubrication | |
| DE/NDE bearings | 6314-C3/6314-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
| Accessories | |
| 3 x PTC thermistor | |
Designed for operations that need an excellent balance between purchase price and energy savings, the 3LC-280S-2 delivers 75 kW of power in a compact format for demanding drives. This 3000 rpm electric motor is suitable where smooth starting, stable speed and reliable operation under everyday load are essential.
A robust cast-iron frame increases motor durability in environments where vibration, frequent starts and long production cycles are expected. Reinforced cast-iron bearing shields and reinforced cast-iron feet help maintain accurate bearing alignment even under continuous mechanical stress. For light and medium industry, this means fewer mounting interventions and greater confidence when integrating the motor into machinery.
3000 rpm electric motor for stable operation of production and technological units
A three-phase electric motor with a rated voltage of 400/690 V is well suited to assemblies where straightforward connection to standard industrial switchboards is important. In practice, this is a solution for a 400 V electric motor that fits OEM machines and smaller technological units where sensible starting behaviour and stable operation under changing load must be maintained.
The rated speed of 2980 rpm supports applications requiring fast drive response and consistent transfer of energy to the working mechanism. A starting torque ratio of 1.8 and breakdown torque ratio of 2.3 give the designer useful parameters for correctly sizing a gearbox, coupling or pump assembly. A starting current ratio of 7.1 helps when designing starting systems where the network response during start-up is also monitored.
IE3 efficiency for lower consumption in everyday operation
IE3 efficiency class – Super High Efficiency is particularly beneficial where the motor runs for much of the day and energy consumption affects costs during every shift. An efficiency of 94.7% and a power factor of 0.9 support economical operation without unnecessary losses under normal operating conditions. For machine manufacturers and operators with their own maintenance teams, it is important that these savings apply not only under laboratory conditions but during long-term everyday operation.
In this respect, higher-efficiency three-phase electric motors perform well in conveyors, mixing units and drives operating in repeated cycles. A noise level of 91 dB(A) should be considered when designing machine enclosures and positioning, particularly when the drive is part of a compact line or standalone technological unit. In practice, this helps avoid additional modifications after installation.
Accurate rotor support and dependable servicing in operation
Rotor inertia of 1.089 kg/m² helps when calculating acceleration and deceleration, which is important in applications with repeated switching or controlled drive dynamics. DE bearing 6314-C3 and NDE bearing 6314-C3 are suitable for long-term operation where bearing stability and minimal service downtime are important. Cable glands 2-M63X1.5 simplify supply-cable and sealing design in switchboard and machine integration.
The model is suitable for clearly defined industrial duties including process-water pumps, cooling-water pumps, air-handling-unit fans, tank mixers, light-waste crushers, belt conveyors, screw conveyors, centrifuges, mixing units for paint-processing technology, compressor units, profile cutters, winding stations and peripheral milling equipment. In each case, the power reserve, stable speed and robust construction help reduce the risk of unplanned downtime.
ISO certificates also contribute to confidence in design and production and simplify integration of the motor into controlled quality processes. A packaging weight of 517 kg and packaging dimensions of 1102*652*846 mm should be considered during handling, storage and production logistics planning. This three-phase electric motor therefore fits projects where not only performance but also installation readiness and long-term operating reliability are evaluated.
If you need a drive for a production line, OEM assembly or smaller technological unit, 3LC PRO provides the required reserve while supporting disciplined energy use. Take advantage of the offer and add a motor to your project that helps maintain stable operation under everyday load.