Three-phase electric motor: H27R-4504-4 1250KW 6000V 50HZ
| Basic technical data | |
| Motor type | H27R 4504-4 |
| Rated power (kW) | 1250 |
| Frame size (mm) | 450 |
| Number of poles | 4 |
| Rated speed (rpm) | 1491 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 6000 |
| Connection | Y |
| Rated current (A) | 141,4 |
| Efficiency at 100% load (%) | 95,9 |
| Power factor at 100% load | 0,89 |
| Starting and torque characteristics | |
| Rated torque (Nm) | 8006 |
| Locked-rotor torque ratio (LRT/RLT) | 0,80 |
| Breakdown torque ratio (BDT/RLT) | 2,2 |
| Locked-rotor current ratio (LRA/RLA) | 6 |
| Rotor moment of inertia (kg·m²) | 29 |
| Load moment of inertia (kg·m²) | 574 |
| Accessories | |
| 6 x PT100 in windings | |
| 1 x PT100 in NDE bearing | |
| 1 x PT100 in DE bearing | |
| Anti-condensation heater 230 V | |
| 3 x PTC thermistor | |
| Applicable standards | |
| Specification | IEC60034-1 |
| Testing | IEC60034-2 |
| Noise | IEC60034-9 |
| Vibration | IEC60034-14 |
| Construction and operating data | |
| Mounting arrangement | IM B3 (other designs on request) |
| Duty type | S1 (S2, S3, S4 – S9 optional) |
| Load type | Parabolic or linear curve |
| Degree of protection | IP55 |
| Insulation class | F |
| Temperature rise class | B |
| Cooling method | IC611 (On request IC616, IC666) |
| Starting method | DOL, VFD, Soft-starter |
| Direction of rotation | Both |
| Vibration (mm/s) | 2.8 |
| Rotor cage | copper rotor bars |
| Terminal box type | VYBO CB1-HV |
| Operating conditions | |
| Ambient temperature range (°C) | -20 to +40 (-30, +50, +60 optional) |
| Maximum installation altitude | up to 1000 m |
| Weight and surface finish | |
| Approximate weight | 4890 kg |
| Colour | RAL7030 |
| Paint finish | shiny |
| Bearings and lubrication | |
| DE/NDE bearings | NU228-C3+6030-C3/NU228-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
Energy efficiency in large drives determines both costs and operating stability, which is why H27R 4504-4-6 is designed as a 1500 rpm electric motor with an output of 1250 kW for applications where long-term loading, precise torque reserve and reliable operation from a 6000 V power supply are expected. This 4-pole electric motor reaches a rated current of 141,4 A, efficiency of 95,9 % and a power factor of 0,89, helping maintain a favourable energy balance in continuous deployment.
IC611 cooling keeps the motor interior clean even in demanding environments
The closed cooling circuit with a heat exchanger supports clean air inside the machine, so IC611 air-to-air cooling improves suitability for dusty, humid and corrosive conditions typical of heavy industry. Combined with IE4 Super Premium efficiency, losses in the high-power drive are reduced and the motor handles long operating cycles more effectively without unnecessary overheating.
Winding design and bearings support long service life
The stator winding with VPI impregnation of the stator winding increases resistance to moisture, dust and vibration, which is important for deployment in power generation and process production. Temperature rise B together with insulation class F provides favourable reserve for loading, while DE bearing NU228-C3+6030-C3 and NDE bearing NU228-C3 help keep rotor operation stable. Rotor inertia of 29,0 kg·m² and load inertia of 574,0 kg·m² must be considered when designing starting and protection.
Precise parameters simplify drive design for large technologies
A rated speed of 1491 rpm and rated torque of 8006 Nm place this model in the class for robust technological nodes where smooth power transmission without fluctuations is required. When designing starting and the power supply, it is necessary to account for starting torque reaching 0,8 times the rated torque, breakdown torque 2,2 times the rated torque and starting current 6 times the rated current. This characteristic simplifies sizing of protection, converters and power-supply fields in drive technology.
Typical deployment in industrial systems
- Main blowers and fans in metallurgical and cement lines.
- Pumping units for cooling and process circuits in chemical production.
- Compressor stations for gas and heavy industry.
- Mills and crushers in raw-material processing.
- Drives for conveyor systems with high hourly loading.
- Mixing and homogenisation units in large process systems.
- Centrifugal separators and technological material-distribution systems.
- Rolling and winding lines with demanding torque profiles.
- Auxiliary energy drives in power-generation operations.
A package weight of 4890 kg and a shaft height of 450 mm simplify planning of handling and installation into the foundation frame. If you need a motor for large continuous deployment, H27R 4504-4-6 from VYBO Electric is prepared for purchasing and technical departments that want to order a solution with clearly defined output, efficiency and cooling reserve; order it in good time to shorten downtime during planned modernisation.
