Three-phase electric motor: H27R-3553-8 280KW 6000V 50HZ
| Basic technical data | |
| Motor type | H27R 3553-8 |
| Rated power (kW) | 280 |
| 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) | 34,5 |
| Efficiency at 100% load (%) | 93,5 |
| Power factor at 100% load | 0,84 |
| Starting and torque characteristics | |
| Rated torque (Nm) | 3618 |
| 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) | 16 |
| Load moment of inertia (kg·m²) | 1250 |
| 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 | 2650 kg |
| Colour | RAL7030 |
| Paint finish | shiny |
| Bearings and lubrication | |
| DE/NDE bearings | 6322-C3/6322-C3 |
| Lubricant | Lithium-based grease No. 2 (temperature class) |
In operations with high mechanical loads and long operating hours, the H27R 3553-8-6 as a 700 rpm electric motor provides a solution that reduces the drive’s energy demands while increasing operational reliability. This high-voltage electric motor with an output of 280 kW and rated speed of 739 rpm is intended for applications where stable torque, low losses and long-term cost savings across the entire technological unit are monitored.
Welded steel frame facilitates handling of large drives
The H27R-HD-Modular series design uses a welded steel frame that combines high rigidity with a more favorable weight than cast-iron solutions. With a package weight of 2650 kg, this approach is particularly evident during transport, installation and precise alignment within the assembly. The rotor cage made of copper strip supports thermal resistance and reduces rotor losses, which is important under long-term load. Energy efficiency reaches 93,5 % and a power factor of 0,84 helps make better use of input power in large operating networks.
IC611 cooling stabilizes the motor in dusty environments
The closed cooling circuit with a heat exchanger provides IC611 air-to-air cooling, which keeps the inside of the motor separated from the external environment. This solution improves suitability for dusty and corrosive conditions where cooling-air cleanliness is often decisive for stable output and longer insulation life. In this context, stator winding impregnation using VPI technology is also used, contributing to resistance under thermal and vibration stress.
Technical parameters support reliable starting and protection
This eight-pole electric motor has a rated current of 34,5 A, rated torque of 3618 Nm, insulation class F and temperature rise class B. Rotor inertia of 16,0 kg·m² and load inertia of 1250,0 kg·m² should be taken into account when designing starting, braking and drive protection. 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, providing important reserve when switching on technological lines.
Typical industrial use in energy-intensive units
The H27R 3553-8-6 model is suitable for:
- Main drives for belt conveyors in mining.
- Crushers and mills in mineral processing.
- Large-diameter fans in power generation.
- Exhaust fans in cement plants.
- Compressor stations with higher-voltage supply.
- Cooling-water pumps in the chemical industry.
- Pumping units for water-management operations.
- Rolling lines in metallurgical plants.
- Extruders in polymer processing.
- Mixing systems in large process tanks.
- Test benches for heavy drive assemblies.
- Rotary kilns and their auxiliary drives.
The 6322-C3 bearing arrangement on both the DE and NDE sides supports stable operation under long-term load and reduces the risk of undesirable overheating in the bearing area. H27R-HD-Modular from VYBO Electric combines robust mechanical construction, efficient cooling and parameters suitable for large industrial units, so take advantage of the offer when designing a drive intended to deliver lower operating costs and long service life.