Electric motor 450 kW, 742 rpm, 400 V / 690 V, H17RL 400X3-8 LV

Common solutions in this power class often run into a compromise between efficiency, dimensions and service accessibility. The H17RL 400X3-8 with an output of 450 kW delivers efficient operation of a low voltage drive for the 700-750 rpm segment, where stable running, reasonable thermal loading and predictable behaviour in long production cycles matter.

H17RL Compact PRO is built as a low voltage asynchronous electric motor for environments where both space utilisation and power reserve are monitored. In machine rooms and technological lines, the compact high power solution helps simplify drive design without an unnecessary increase in installation size. In practice, the choice of mounting design is also important, which is why IM B3, B35, B5 and V1 versions are available according to the method of installation into the assembly.

The modern design created using Hi-TECH technologies supports more precise behaviour under load and better consistency of manufacturing tolerances. In heavy industry conditions, this electric motor belongs to the Heavy Duty process performance class, so it is suitable where long term loading and repeated starting are expected. As an 8 pole electric motor, it is suitable for applications where stable torque at lower speeds is important. Industrial electric motors 400/690 V in this configuration are often chosen when modernising older drives with the aim of maintaining operational continuity.

700-750 rpm segment for drives under long load

For the 700-750 rpm segment, it is crucial that the drive can handle both starting and steady operation without excessive strain on the supply network. Rated speed of 742 rpm and rated torque of 5792 Nm create the basis for applications where low speed pulling power and an exact link to the technology are monitored.

• Rated current with delta connection 400V is 841 A, which is important when designing the switchboard and line protection.
• Rated current with Y connection 690V is 488 A, which makes integration into systems with a higher voltage level easier.
• A starting torque ratio of 120% helps when starting loads with higher inertia.
• A pull out torque ratio of 200% provides reserve during short term load peaks.
• A starting current ratio of 650% must be considered when coordinating with the power supply infrastructure.
• Efficiency of 95.6% supports lower operating losses during long shifts.
• Power factor of 0.81 is relevant when designing compensation and network sizing.

In technical documentation and during commissioning, insulation class F together with temperature rise B also helps, because the motor handles temperature cycles in production conditions better. Weight of 3800 kg, external starting inertia of 591 kg·m² and moment of inertia GD² of 64.0 kg·m² are data that make it easier to assess the foundations, acceleration and link to the operating mechanism.

Construction with bearing protection and service monitoring

The standard equipment is designed with emphasis on long term operation in production. The steel cooling cover, reinforced bearing housing including steel shielding and high temperature lubrication, metal terminal box and reinforced bearing end shields increase the durability of the assembly under regular load. The robust aluminium squirrel cage rotor improves the mechanical strength of the rotor during repeated starts.

DE bearing 6326C3 and NDE bearing 6326C3 support bearing stability in demanding operation. If the project includes enhanced machine condition monitoring, the equipment includes PT100 winding and bearing sensors, an anti condensation heater and a trio of PTC thermistors, which helps with temperature control and reduces the risk of condensation during shutdowns.

Deployment in plants where availability matters and sales worldwide

The H17RL 400X3-8 model is suitable for high flow pumping stations, fan units in heavy industry, compressor assemblies, conveyor lines, mixing equipment, crushing technological units, rolling mills, water management pumping systems and process production plants with low voltage infrastructure. In each of these applications, the ability to maintain stable operation under long load while preserving service predictability is important.

VYBO Electric works with its own research and development to ensure that the design of the H17RL Compact PRO series meets the requirements of both modernisation and drive replacement in industrial companies. The brand sells worldwide and, for projects with international reach, provides a technical basis for uniform deployment across different manufacturing standards.

For plants, technology suppliers and industrial companies, it is important that this motor combines 450 kW output, 400 V / 690 V network adaptation and operating characteristics suitable for permanent deployment. Suitability for project equipment can therefore also be assessed in terms of rapid implementation into existing lines. Request a quotation.