Electric motor 400 kW, 1490 rpm, 400 V / 690 V, 4LC-355LX1B-4 LV

Solutions in IE2 or IE3 class can, at the same load, leave significantly higher thermal and electrical losses, whereas 4LC-355LX1B-4 with an output of 400 kW and a speed of 1490 rpm belongs to the speed class 1400-1500 rpm, where IE4 efficiency helps reduce energy losses by approximately 15 % to 20 % compared with IE3. For large factories and technological units, this is a practical difference in operating costs, especially with long service intervals and high load. This three-phase motor from VYBO Electric is designed with emphasis on reliable starting, stable efficiency and suitability for super premium efficiency in an environment where continuous operation is expected.

High efficiency reduces losses in continuous operation

The rated current at the delta 400 V connection reaches 661 A and at star 690 V 383 A, while the power factor 0.9 supports the efficient use of electrical energy in power supply systems with high consumption. An efficiency of 96.9 % is important in long-term operation, when even small differences in losses are reflected in the overall production costs. The starting ratio Tst/Tn 1.8, breakdown ratio Tmax/Tn 2.2 and starting current Ist/In 8.5 give designers a basis for assessing starting in assemblies with higher inertia or process resistance. Noise level 92 dB(A) must be taken into account when designing the machine room, enclosure and acoustic measures.

Construction for robust installation and service conditions

The frame size according to IEC 355 mm allows use in heavier technical assemblies, where a solid mechanical connection and precise mounting of the drive are required. The 2-M63X1.5 cable entries simplify the robust connection of power conductors in industrial switchboards. The DE bearing 6322-C3 and the NDE bearing 6322-C3 both support stable operation of the rotor under load, and the 3 PTC thermistors help protect the winding against thermal overload. The packed weight of 2100 kg confirms that this is a substantial solution ready for integration into large technological assemblies.

Use in demanding industrial operations

The motor is suitable where long-term reliability, high output and precise control of operating modes are required. It is especially suitable for applications where mechanical durability is combined with energy savings and the need for consistent drive availability.

• Main pump units in power generation and water supply.
• Fan and blower units in large HVAC installations.
• Compressor assemblies with long operating times.
• Crushers and mills in raw material processing.
• Rolling and conveyor lines in metallurgy.
• Mixing and homogenising equipment in the chemical industry.
• Drives for extruders and extrusion lines.
• Process pumps for petrochemical operations.
• Transport systems with high starting torque.
• Drying and filtration units in the production process.
• Units for paper lines and pulp processing.
• Heavy operating nodes in cement plants.
• Large process systems with a requirement for continuous operation.

For industrial projects that require precise technical advice, this motor is a suitable basis for long-term operation and optimisation of the energy balance. If you need to verify the load, starting or connection in a specific machine, check the suitability of the motor for your application.

Technical parameters for drive design

The 4LC-355LX1B-4 model operates at a rated speed of 1490 rpm, with an efficiency of 96.9 % and a power factor of 0.9, which makes power supply design and loss assessment in operation easier. 6322-C3 bearings are available on both the DE and NDE sides, and the standard connection via 2-M63X1.5 means integration into heavy industrial equipment remains technically straightforward. VYBO Electric bases development on its own research, many years of industrial experience and a strong position in the Central European market.