Electric motor 500 kW, 1485 rpm, 400 V / 690 V, H17RL 355X3-4 LV

For the 1400-1500 rpm segment, it is crucial that the drive maintains stable operation even under long-term load. The H17RL 355X3-4 is a low-voltage asynchronous electric motor which, in this range, helps maintain efficient operation of the low-voltage drive in manufacturing plants, technological units and during the modernisation of older lines. When powered as an electric motor 400 V / 690 V, it is suitable where operation requires a direct connection to the LV distribution network and at the same time a reserve for start-ups and technological load changes.

The 1400-1500 rpm segment in heavy industry

The Heavy Duty process performance class is intended for operations that work with a high level of operational discipline and long production cycles. In this category, the H17RL Compact PRO is used as an electric motor for universal industrial applications where resistance to repeated starts, stable torque and consistent behaviour under variable load are important. The robust cast iron frame supports a long service life in environments with vibration, dust and frequent maintenance interventions.

H17RL 355X3-4 is built on an IEC frame 355 mm and uses a massive aluminium rotor cage, selected with regard to operational reliability and a sensible service strategy. Rated power 500 kW, rated current delta 400V 864 A, rated current Y 690V 501 A and rated speed 1485 rpm create a combination suitable for technologies where not only power is monitored, but also consumption and the available space in the drive system. Efficiency of 96.3 % and power factor 0.87 help reduce operating losses during continuous operation, which is important in LV electric motors during long production shifts.

• Rated torque 3215 Nm supports stable start-up of technological units without unnecessary fluctuation.
• Starting torque ratio Tst/Tn 140 % helps when starting equipment with a higher resistant load.
• Breakdown torque ratio Tmax/Tn 200 % provides reserve for short-term process peaks.
• Starting current ratio Ist/In 700 % forms the basis for proper design of switching and protection.
• Insulation class F together with temperature rise B supports thermal stability under long-term load.
• Weight 2800 kg and external starting inertia 328 kg.m2 are values that matter when designing the foundation and the starting regime.
• Moment of inertia GD2 29.6 kg.m2 is important when sizing the acceleration and braking of the system.

Construction ready for both installation and operational requirements

The choice of mounting design is made according to the actual layout of the technology, so the available IM B3, B35, B5 and V1 designs make it easier to integrate into both new and refurbished drives. The modern design created using Hi-TECH technologies improves service readability of the assembly and supports more accurate planning of shutdowns. The standard equipment includes a steel cooling cover, reinforced bearing arrangement including steel covering and high-temperature grease, a terminal box in a metal design and reinforced bearing shields for a more stable structure.

The DE 6322C3 and NDE 6222C3 bearing arrangement is selected with emphasis on operation in industrial deployment, where service life and repeatability of behaviour under load are monitored. For applications with higher sensitivity to temperature monitoring, thermal protection is available with 6x PT100 in the winding, PT100 in the DE and NDE bearing, anti-condensation heating and 3x PTC. Such a solution helps technical teams detect changes in the condition of the drive more quickly before a shutdown occurs.

LV electric motors for the modernisation of production lines

VYBO Electric draws on its own development and work with premium materials in these drives, which is reflected in consistent workmanship, control of manufacturing tolerances and an emphasis on technical advice during selection. In Central Europe, we are the largest company in our sector, so we can also support projects where the replacement of a motor has to be aligned with the existing infrastructure, starting conditions and the plant’s service strategy.

H17RL 355X3-4 is suitable for conveyor lines, mixing units, compressor stations, pumping systems, extruders, crushers, fan blocks, rolling feeders, granulation equipment, agitators in chemical production, belt conveyors with high inertia, machines for processing bulk materials, paper machinery operations and auxiliary drives in metallurgy. In such use, it is crucial that the low-voltage asynchronous electric motor can be connected to the production technology without unnecessary compromises in maintenance.

If you are looking for a replacement for an older drive or designing a new line, this electric motor from the H17RL Compact PRO range gives room for precise sizing, fast integration and control of thermal and mechanical conditions in operation. For technical verification of suitability, connection to the existing switchboard and installation design, send us an enquiry.

Technical parameters for precise drive sizing

Torque, currents and efficiency in practice

When designing a drive, it is important to work with values that correspond to the actual load and starting method. Rated torque 3215 Nm supports stable power transmission to the technology, starting torque ratio Tst/Tn 140 % provides a usable reserve during start-up and breakdown torque ratio Tmax/Tn 200 % helps with short-term peaks. Starting current ratio Ist/In 700 % requires proper setting of protection and switching logic in line with the LV infrastructure.

Rated current delta 400V 864 A and rated current Y 690V 501 A make it possible to choose the appropriate connection according to the specific system. Efficiency of 96.3 % and power factor 0.87 are practical data for an energy audit, since every kilowatt-hour that the drive does not turn into unnecessary losses is reflected in operating costs.

Dimensions, bearings and thermal stability in long cycles

With a weight of 2800 kg, an external starting inertia of 328 kg.m2 and a moment of inertia GD2 of 29.6 kg.m2, it is advisable to take the foundation, handling and start-up dynamics into account already at the project stage. Insulation class F and temperature rise B support safe use in operations where the drive works for long hours without a break. The rotor cage in a robust aluminium design, together with the DE 6322C3 and NDE 6222C3 bearings, creates an assembly that is ready for industrial loading and regular supervision by technical maintenance.

The H17RL 355X3-4 model is suitable for companies that want to combine performance, service predictability and technical advice from the manufacturer. VYBO Electric supplies a solution for efficient operation of a low-voltage drive that can also be technically justified in demanding project conditions.