Electric motor 400 kW, 742 rpm, 400 V / 690 V, H17RL 400X2-8 LV

During the modernisation of the main drive, the main problems are usually load fluctuations, thermal reserve and precise grid matching. The H17RL 400X2-8 with an output of 400 kW provides performance for demanding technologies when reliable operation is required in the range of 700-750 rpm and a long duty cycle without unnecessary outages.

Stable performance for the 700-750 rpm range in demanding production

This three-phase motor 400/690 V is designed to maintain a smooth transfer of energy to the technology in low-speed operation. Rated speed of 742 rpm, rated torque of 5148 Nm, power factor of 0.81 and efficiency of 95.5% support a reliable operating balance where both consumption and mechanical stress are monitored. In practice, this is a low-voltage asynchronous electric motor for applications with a high load start-up and a requirement for precise drive coordination.

The massive aluminium rotor cage, together with a robust shaft centre height of 400 mm and a weight of 3560 kg, create a design ready for long-term load. The motor can be matched to a 380 V, 440 V, 500 V, 690 V and 720 V network, which makes integration into existing technologies easier without complicated interventions in the distribution system. VYBO Electric develops this series for European industry, especially for operations in Western Europe, where emphasis is placed on repeatable reliability and service predictability.

Design ready for long operation

The standard supply includes a steel cooling cover, reinforced bearings with steel shielding, high-temperature lubricant in the bearings, a metal terminal box and reinforced bearing end shields. Insulation class F together with temperature rise B improve thermal resistance under longer load and help maintain parameters even in operations with limited cooling space. This design supports a strong cast iron frame, which translates into long-term operational peace of mind.

• A starting torque ratio of 120% helps when starting conveyors and mixers.
• A pull-out torque ratio of 200% creates a reserve for fluctuating technology load.
• A starting current ratio of 650% must be considered when designing the power supply and switching.
• An external starting inertia of 525 kg·m2 corresponds to heavier drives with higher stored energy.
• A moment of inertia GD2 of 60.0 kg·m2 makes design easier when synchronising with the gearbox.
• DE bearing 6326C3 increases confidence under radial loading on the drive side.
• NDE bearing 6326C3 adds stability at the opposite end of the shaft.

Adaptation for technologies with high load

Industrial companies often look for an electric motor for low-speed applications that can handle long load periods without loss of efficiency. This model is therefore a good choice as a drive for demanding applications in mixing, pumping and conveyor systems, where a firm response to changes in resistance is required. The specially developed modern design with Hi-TECH technologies helps maintain compact dimensions at a performance level that is decisive in this class.

Deployment in industrial operations

• Cement mill with high inertia at start-up.
• Spiral conveyor with variable build-up of material.
• Vertical mixer for mineral mixtures.
• Process water pumping station in heavy industry.
• Ventilation unit for technological extraction.
• Crusher with periodic impact loading.
• Extrusion line with a requirement for stable speed.

If monitoring of the winding and bearings needs to be added, the available accessories include 6x PT100 in the winding, PT100 in the DE and NDE bearing, anti-condensation heating and 3x PTC. Such a solution is practical when modernising production lines, where predictive maintenance and a safe start after shutdown are monitored. As a proven manufacturer and distributor, VYBO Electric supplies documentation that makes integration into existing distribution systems and service regimes easier.

Choosing a drive for modernisation without unnecessary compromises

When selecting, it is important to assess the load, supply voltage, mechanical inertia and start mode, not just the rated power. The H17RL 400X2-8 in the H17RL Compact PRO series offers a reliable basis for technologies that need torque reserve, thermal stability and compatibility with different voltage levels. For projects where delivery certainty and technical continuity matter, send us an enquiry.