Electric motor 55 kW, 1485 rpm, 400 V / 690 V, 4LC-250M-4 LV

Compared with IE2 and IE3 solutions, this IE4 motor delivers noticeably lower losses, so in long-term operation it can reduce energy consumption by approximately 15 % to 20 % depending on the load and operating mode. The 4LC-250M-4 model with an output of 55 kW operates in the speed range of 1400-1500 rpm, which is suitable for pumps, fans and compressors requiring smooth and reliable operation. It is a three-phase motor designed for low-voltage networks where high efficiency, a good power factor and stable operating characteristics are required.

Energy savings in long daily operation

An efficiency of 95.7 % and a power factor of 0.86 reduce network loading and operating costs, especially where the motor runs for long hours under constant or variable load. For drives with a high annual number of starts and operating hours, the difference between IE3 and IE4 results in lower losses, less heating and better overall economy. The rated speed of 1485 rpm also supports use in applications where a balanced ratio between output, torque and flow control is important.

Robust construction for industrial loads

The all-cast-iron design with a frame size of 250 mm increases the motor’s durability in operations with higher vibration and more demanding environments. The starting torque ratio Tst/Tn of 2 and the breakdown torque ratio Tmax/Tn of 2.3 provide reserve during starting and short-term overload. The starting current ratio Ist/In of 9 must be taken into account when designing protection and switching devices, especially in larger systems with limited power reserve.

Operating data for reliable integration

Noise level 79 dB(A) helps when assessing deployment in technological systems where workplace acoustic load is monitored. Rotor inertia of 0.8 kg*m² is important when sizing the start-up and control of the drive. 6314-C3 bearings on both the DE and NDE sides support long-term operation in standard industrial assemblies, and the 3 PTC thermistors provide scope for protecting the winding against thermal overload. 2-M63X1.5 cable glands make connection easier in switchboards and larger machine assemblies.

Use in demanding industrial operations

The motor is suitable for universal industrial applications where reliable performance under continuous load and stable parameters during repeated starts are required.

• Pumps for water supply, process circuits and circulation systems.
• Fans, blowers and air handling units with continuous operation.
• Compressors in industrial and service operations.
• Mixers, agitators and homogenisation equipment.
• Conveyor drives in logistics and manufacturing.
• Reduced drive assemblies for packaging lines.
• Machine units with higher torque demand during starting.
• Production lines in the food and processing industry.
• Technologies requiring low losses and long daily operation.
• Operations with limited space for motor installation.
• Units requiring thermal protection via PTC inputs.
• Industrial assemblies where high efficiency and low noise are important.

Selection support for operations with their own energy systems

VYBO Electric builds on its own research and development and provides customers with technical advice when selecting a motor according to load, supply and operating profile. As one of the most prominent manufacturers in its sector in Central Europe, it can effectively cover the needs of both smaller and large industrial operations. For this model, we therefore recommend checking the motor’s suitability for your application, especially if you need to combine economical operation, robust construction and long service life in demanding use.