Electric motor 500 kW, 990 rpm, 400 V / 690 V, H17RL 400X2-6 LV

Common solutions in this performance range often run into higher losses, larger dimensions and poorer suitability for low voltage drives. The H17RL 400X2-6 model is designed to deliver efficient low voltage drive operation in service while maintaining stable performance in the 900-1000 rpm segment. In practice, this is appreciated by manufacturing plants and technology suppliers alike, who need a reliable low voltage asynchronous electric motor for line modernisation and for replacing older units.

Compact solution for the 900-1000 rpm segment

This H17RL 400X2-6 is among the compact high output solution range, because at an output of 500 kW it uses a 400 mm frame size in a design optimised for high power density. The rated current at 400V in delta connection is 876 A and the rated current at 690V in star connection reaches 508 A, giving designers support when specifying the switchgear and protective elements. Rated speed of 990 rpm and rated torque of 4823 Nm are suitable for applications where smooth engagement and load stability are critical.

• The starting torque ratio Tst/Tn is 120%.
• The breakdown torque ratio Tmax/Tn is 200%.
• The starting current ratio Ist/In is 680%.
• Efficiency of 96.1% supports lower operating losses.
• Power factor of 0.86 helps with the design of the supply system.

Internally, a heavy duty aluminium rotor cage is used, which helps with robust power transmission to the load. DE 6326C3 and NDE 6326C3 bearings are selected with emphasis on long-term operation and stability under higher mechanical stress. Insulation class F together with temperature rise class B provides a reserve for demanding duty cycles that are common in the 900-1000 rpm segment.

Mounting design and construction for industrial electric motors 400/690 V

Operations with different plant layouts will benefit from the choice of mounting design, which makes integration into existing drives easier. This low voltage asynchronous electric motor therefore performs well as part of industrial electric motors 400/690 V assemblies, where accessibility, service space and frame orientation are decisive. The modern design created using Hi-TECH technologies supports more precise processing of details and consistent construction in serial production.

The standard equipment includes a steel cooling cover, reinforced bearing arrangement including steel shielding and high temperature grease, a terminal box in a metal design, and reinforced bearing end shields for a more stable construction. A weight of 3750 kg, external starting inertia of 492 kg·m² and moment of inertia GD² of 53.2 kg·m² help when designing drives with greater inertial load. The 400 V / 690 V electric motor is therefore suitable for assemblies where mechanical durability and precise connection in low voltage infrastructure are important.

Heavy duty process performance for demanding applications

Electric motors in this series belong to the Heavy Duty process performance class and are intended for heavy industry, where operational stability and long-term durability are monitored. In the VYBO Electric portfolio, this is the result of in-house research and development, which is reflected in the construction details and in technical support during drive design. If the equipment includes a PT100 winding and bearing sensor, an anti-condensation heater and a triple set of PTC thermistors, it makes it easier to monitor the thermal condition of the machine in demanding conditions.

The H17RL 400X2-6 model is suitable for cooling towers, agitators in the chemical industry, belt conveyors, crushers, mixing lines, pumping stations, rolling mill units, fan assemblies, compressor drives and extrusion machines. In these operations, not only output matters, but also the ability to maintain operation in a stable mode during repeated starts and long load periods. Sales worldwide confirm that the solution is ready for projects with different levels of standardisation and regional requirements.

Availability and support for drive modernisation

When replacing an older motor or designing a new line, the availability of the solution at the time when the shutdown decision is being made is also important. The H17RL 400X2-6 in the H17RL Compact PRO series combines a compact high output solution, the option to adapt the mounting design, and construction prepared for long-term industrial operation. VYBO Electric also provides technical support, which makes it easier to select for low voltage drives in industrial projects. Request a quotation.