Three-phase electric motor: H27R-4503-4 1120KW 6000V 50HZ
| Basic technical data | |
| Motor type | H27R 4503-4 |
| Rated power (kW) | 1120 |
| Frame size (mm) | 450 |
| Number of poles | 4 |
| Rated speed (rpm) | 1490 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 6000 |
| Connection | Y |
| Rated current (A) | 126,8 |
| Efficiency at 100% load (%) | 95,8 |
| Power factor at 100% load | 0,89 |
| Starting and torque characteristics | |
| Rated torque (Nm) | 7179 |
| Locked-rotor torque ratio (LRT/RLT) | 0,76 |
| Breakdown torque ratio (BDT/RLT) | 2,1 |
| Locked-rotor current ratio (LRA/RLA) | 5,7 |
| Rotor moment of inertia (kg·m²) | 26,5 |
| Load moment of inertia (kg·m²) | 507 |
| 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 | 4720 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) |
The H27R 4503-4-6 electric motor with an output of 1120 kW is designed for operations where long-term stability, precise energy balance and lower service costs over the complete drive life are decisive. This 1400 rpm electric motor operates at a rated voltage of 6000 V and a rated speed of 1490 rpm, making it suitable for large process systems where both efficiency and reliability in continuous operation are monitored. High efficiency of 95,8 % supports energy savings especially where the motor runs for long hours each day and every reduction in losses has a direct impact on the operating budget.
The design with a welded steel frame provides high rigidity with easier handling than massive cast-iron solutions, which installation teams appreciate when positioning large drives. The closed IC611 air-to-air cooling system keeps the motor’s internal circuit clean and improves usability in dusty, humid or corrosive operations. The rotor cage made of copper strip supports lower electrical losses and thermal resistance, so the motor handles long loading in industrial cycles more effectively.
Higher efficiency in large drives reduces energy costs
In motors of this class, success is judged not only by rated output but also by how efficiently electrical energy is converted into mechanical work. A power factor of 0,89 helps make better use of the power-supply system and reduces unnecessary reactive loading of the grid. Rated current of 126,8 A enables more precise sizing of power supply, switching and protection, which is important when integrating into existing switchboards in large factories.
In operations with high reliability requirements, this high-voltage electric motor is used where stable output must be maintained during long cycles and repeated starts. Thanks to its design for demanding industrial deployment, the risk of unplanned downtime is reduced and maintenance can be planned more effectively. The emphasis on efficiency, robust mounting and suitable cooling directly helps reduce total cost of ownership.
Starting and torque reserve support safe power supply
When designing starting, torque reserve and start-up behaviour are important. Starting torque reaches 0,76 times the rated torque, breakdown torque 2,1 times the rated torque and starting current 5,7 times the rated current. This combination helps designers correctly set protection, power-supply components and control so that the motor handles the load without unnecessary risk to the grid or drive mechanics.
Parameters that simplify design of a large drive
Rated torque of 7179 Nm provides a sufficient basis for heavy applications with higher inertia. Rotor inertia of 26,5 kg·m² and load inertia of 507,0 kg·m² provide important input for calculating starting, braking and the dynamics of the complete machine. Insulation class F together with temperature rise B supports operation in conditions where long loading and frequent mode changes are expected.
At this power level, it is worthwhile to treat the motor as a component that should form part of an integrated company energy strategy. That is why this four-pole electric motor is suitable for operations that need to combine high output, sensible efficiency and service availability.
Industrial applications where high output and stable operation are utilised
The H27R 4503-4-6 model is suitable for several heavy-duty operations where reliable transfer of energy to large technological systems is decisive:
- Main pumps in power generation where stable flow and long-term operation are important.
- Large fans and blowers in metallurgical and thermal processes.
- Compressor stations for pressure systems requiring continuous output.
- Crushers and mills in mining and raw-material processing with high load inertia.
- Conveyor drives in extensive production lines and warehouse systems.
- Agitators and homogenisation units in the chemical and process industries.
Bearing design for long operation
DE bearing NU228-C3+6030-C3 and NDE bearing NU228-C3 form a solution that supports reliable operation under high load. Correctly selected mounting is essential in motors of this category, particularly to preserve running accuracy and limit wear during long-term deployment.
A solution for operations that need output and availability
A package weight of 4720 kg corresponds to a robust industrial design prepared for the logistics of large projects. Combined with the welded frame and closed cooling, this is a solution for companies that want output without unnecessarily increasing costs for service, downtime and handling. If you want to strengthen your drive with a reliable high-efficiency model, take advantage of the offer and select H27R 4503-4-6 from VYBO Electric.