Electric motor 710 kW, 990 rpm, 400 V / 690 V, H17RL 450X2-6 LV

In heavy-duty operation, where neither loss of time nor an unbalanced start-up is forgiven, the H17RL 450X2-6 delivers efficient operation of a low-voltage drive for the 900-1000 rpm segment. This low-voltage asynchronous electric motor is designed for manufacturing plants and technology suppliers who need reliable power transmission without unnecessary changes to the infrastructure. VYBO Electric builds on years of development in industrial drives with this series and translates them into a solution that supports stable operation even during long duty cycles.

A compact solution with high power density for the 900-1000 rpm segment

An output of 710 kW in this class is combined with a compact body, which simplifies integration into existing lines while saving space in the machine room. For operations with limited space, it is important that the 450 mm frame size provides a suitable basis for high power density without compromising mechanical stability. The rated current delta 400V is 1244 A and the rated current Y 690V is 721 A, therefore the power supply design needs to be addressed already at the stage of switchboard modernisation. The rated speed of 990 rpm corresponds exactly to what customers expect from the 900-1000 rpm segment in continuously loaded operations. The rated torque of 6849 Nm gives the drive reserve for starting technological units that exert resistance from the very first revolutions.

Mounting options for both refurbishments and new lines

For installation projects, it is an advantage that the available IM B3, B35, B5 and V1 design allows the motor to be adapted to the existing machine arrangement without unnecessary modifications to the foundations. Industrial companies dealing with drive replacement will appreciate this approach, as it shortens the time needed for mechanical integration and makes it easier to design the connection to the process technology. The starting torque ratio Tst/Tn at 110% supports starting where the load is present from the first moment, and the breakdown torque ratio Tmax/Tn at 200% adds reserve during short-term process fluctuations. The starting current ratio Ist/In at 700% must be incorporated into protection and control so that the network is ready for dynamic start-ups without unnecessary interruptions.

Drive efficiency under long-term load

An efficiency of 96.1% supports lower operating losses in applications where every kilowatt hour translates into production costs. A power factor of 0.86 helps with the design of the electrical part of the drive and with the correct sizing of compensation in the substation. In this context, energy-saving electric motors become a practical tool for cost management, not just a marketing label. Insulation class F and temperature rise B create a suitable reserve for operations that work with long cycles and higher ambient temperatures. The rotor cage made of copper strip improves behaviour under load and contributes to more stable torque transfer. This 6-pole electric motor therefore fits well into technologies where stable performance at lower speeds is important.

Construction ready for heavy industry

Electric motors in this series belong to the Heavy Duty process performance class and are intended for heavy industry, where long-term durability during continuous operation is monitored. Standard equipment includes a cooling cover made of steel, reinforced bearing mounting including steel shielding and high-temperature grease, a terminal box in metal design, as well as reinforced bearing end shields for a more stable structure. The DE bearing 6328C3 and the NDE bearing 6328C3 support precise shaft mounting under heavy working conditions. A weight of 5000 kg reflects robust mechanics, which is an advantage in industrial operations when damping vibrations and maintaining the alignment geometry. The external starting inertia of 699 kg·m² together with the moment of inertia GD² 72.0 kg·m² helps with the design of starting characteristics and with the correct setting of control.

Operational reliability for applications with continuous load

A modern design created using Hi-TECH technologies supports precise integration into lines where stable operation and easier service coordination are expected. With this series, it is natural to also consider equipment that includes PT100 winding and bearing sensors, an anti-condensation heater and a set of three PTC thermistors, especially in environments with fluctuating temperatures and higher humidity. Such a solution is practical for applications where the 400 V / 690 V electric motor is part of a larger technological unit and its compatibility with control, monitoring and maintenance is decisive.

Typical industrial use in demanding operations

The H17RL 450X2-6 motor is suitable for the following applications:

• Main drive of a rolling mill stand in a steel plant.
• Crusher drive in mining and stone processing.
• Drive unit of a belt conveyor for bulk materials.
• Drive of a mixing unit in a cement plant line.
• Primary pump drive for process water in a chemical plant.
• Flue gas fan drive in a power generation unit.
• Drive for a compressor station for process air.
• Main drive of an extruder in polymer production.
• Drive of a drum dryer in a wood processing operation.
• Drive of a grinding mill in materials processing.
• Drive motor of a mixer in refinery technology.
• Drive of a winding line in metallurgical and cable processing.

Availability you can incorporate into modernisation

For companies dealing with drive replacement or capacity expansion, it is important that the H17RL Compact PRO represents a technical solution ready for rapid integration into low-voltage infrastructure. An output of 710 kW, rated speed of 990 rpm and stable mechanical construction create a basis for long-term use in processes where reliability, service predictability and efficient operation are monitored. In projects with a precisely defined timetable, motor availability is a practical factor when planning both shutdown and start-up of the new technology. If you need to include this electric motor in a specific drive, please request a quotation.