Three-phase electric motor: H27R-3552-8 250KW 6000V 50HZ
| Basic technical data | |
| Motor type | H27R 3552-8 |
| Rated power (kW) | 250 |
| Frame size (mm) | 355 |
| Number of poles | 8 |
| Rated speed (rpm) | 739 |
| Frequency (Hz) | 50 |
| Electrical parameters | |
| Rated voltage (V) | 6000 |
| Connection | Y |
| Rated current (A) | 30,9 |
| Efficiency at 100% load (%) | 93,2 |
| Power factor at 100% load | 0,84 |
| Starting and torque characteristics | |
| Rated torque (Nm) | 3231 |
| Locked-rotor torque ratio (LRT/RLT) | 1,20 |
| Breakdown torque ratio (BDT/RLT) | 2,0 |
| Locked-rotor current ratio (LRA/RLA) | 5,1 |
| Rotor moment of inertia (kg·m²) | 15 |
| Load moment of inertia (kg·m²) | 1010 |
| 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 | 2580 kg |
| Colour | RAL7030 |
| Paint finish | shiny |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
The design for heavy industrial operations in the H27R 3552-8-6 model is based on efficient power transmission and low losses that reduce energy consumption under long-term load. This 700 rpm electric motor with an output of 250 kW and a 6000 V power supply is intended for applications where stable operation, high torque and precisely designed operating reserve are decisive.
Economical operation in high-power drives
High efficiency of 93,2 % and a power factor of 0,84 help limit unnecessary losses in systems that run continuously. The H27R-HD-Modular series therefore supports more economical operation in drive technology, especially where energy costs, thermal load and equipment availability throughout the year are monitored.
Stable operation during demanding starting
Rated current of 30,9 A, rated torque of 3231 Nm and a speed of 739 rpm create a balanced basis for power-supply and protection design. When sizing starting, it is also useful that starting torque reaches 1,2 times the rated torque, breakdown torque 2 times the rated torque and starting current 5,1 times the rated current. Such parameters facilitate selection of switching and protection for high-inertia systems.
Welded steel frame for large installation units
The welded steel frame contributes to high structural rigidity while simplifying handling during delivery and installation into technological units. With this 8-pole electric motor, it is therefore easier to work in assemblies where a firm mechanical connection, vibration limitation and reliable mounting under heavy industrial conditions are required.
- High package weight of 2580 kg corresponds to a robust design for large drives.
- Rotor inertia of 15,0 kg·m² supports predictable dynamic behavior.
- Load inertia of 1010,0 kg·m² enables design for high torque demands.
- DE bearing 6322-C3 and NDE bearing 6322-C3 increase reliability during long-term operation.
Temperature monitoring for reliable continuous operation
H27R-HD-Modular motors are prepared as standard for monitoring winding and bearing temperatures, supplemented by anti-condensation components that protect the machine during shutdowns and starts. This standard thermal protection and monitoring help keep operation under control in demanding cycles where rapid diagnostics and high availability are required.
Typical use in large industrial units
H27R 3552-8-6 is used in mills, crushers, pressing lines, agitators, pumping stations, fans, blowers, compressor assemblies, rolling drives, conveyors, drum dryers, extruders, flocculation mixers, mixing reactors and auxiliary drives in power-generation units. In each of these applications, the IE4 concept helps limit operating losses and maintain economical operation at a high level.
Parameters that assist project integration
Insulation class F together with temperature rise class B supports a safe reserve for thermal stress in industrial use. The H27R-HD-Modular series can be integrated into projects as a three-phase electric motor for large technological units where long service life, precise sizing and reliable support of production continuity are expected. VYBO Electric maintains a consistent emphasis on robust construction, service availability and practical installation suitability.
Contact us for technical advice and a quotation for H27R 3552-8-6.