Electric motor 355 kW, 1490 rpm, 400 V / 690 V, 4LC-355LX1A-4 LV

Model 4LC-355LX1A-4 with an output of 355 kW is designed for operations where smooth power transmission, low losses and long-term stability in the speed range of 1400-1500 rpm matter. In practice, it provides a solid foundation for drives that operate under continuous load, while the design uses advanced materials, precisely engineered windings and an optimised air gap for efficient operation. For large factories and production lines, this is an IE4 electric motor that combines high efficiency with consistent performance in 400 V and 690 V networks.

Economical operation at high power in the 1400-1500 rpm range

In the 1400-1500 rpm segment, the motor naturally meets the requirements of continuous processes, where not only rated output is monitored, but also torque stability, thermal loading and operational reliability. Efficiency of 96.9% and a power factor of 0.9 help reduce energy losses in long production cycles, which is especially important where drives for light and heavy industry run in one technological chain. The rated current at the delta 400 V connection is 593 A and at the star 690 V connection is 344 A, so the design of the switchboard and protection devices can be adapted to the specific voltage system.

Stable start-up and reserves for load

The starting torque ratio Tst/Tn 1.8 and the breakdown torque ratio Tmax/Tn 2.2 provide sufficient reserve when starting the technology and also during a short-term increase in resistance of the driven machine. The starting current ratio Ist/In 8.5 must be taken into account when designing the start-up, especially in applications with a higher moment of inertia of the system and a requirement for controlled run-up. Noise level of 92 dB(A) corresponds to a power category where suitable acoustic separation and correct placement of the motor in the machine room are expected in practice.

Industrial use in energy-intensive operations

This power class is suitable for compressor stations, large pump units, conveyor lines, mixing and processing technologies, as well as for primary and secondary drives in metallurgy and heavy engineering. High efficiency, a robust IEC frame 355 mm and consistent thermal behaviour support long operating intervals without unnecessary downtime. When used in demanding networks, it is also appreciated that VYBO Electric develops its own design and production, backed by many years of experience in the field of industrial electric motors.

For integration into switchgear, the 2-M63X1.5 cable glands are also important, as they make it easier to route power cables and simplify installation in robust cabinets. The DE 6322-C3 bearing and the NDE 6322-C3 bearing are a suitable choice for stable rotor support during longer operation, while 3 PTC thermistors increase protection of the winding against excessive heating. The package weight of 2020 kg testifies to a massive design, which is typical for large industrial motors intended for reliable use in continuous operation.

Design ready for safe integration into technology

When planning a replacement or a new project, it is important that the motor operates with the 400 V and 690 V voltage pair, so it can be included in several standard industrial assemblies without compromising the operating concept. The high IE4 efficiency reduces thermal loading and helps make better use of the installed input power, which is especially important in operations with long running hours. If the aim is a reliable purchase for technological units with an emphasis on performance, service life and service predictability, this model represents a sensible basis for further technical processing; request a quotation and we will prepare a solution according to your application.