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Linz Electric PRO28S A/4 Alternator – 180 kVA Three-Phase Brushless Synchronous Alternator
The PRO28S A/4 alternator from Linz Electric is a compact and robust three-phase, 4-pole brushless synchronous alternator delivering 180 kVA at 50 Hz and 215 kVA at 60 Hz. With AVR-controlled voltage regulation, Class H insulation, IP23 protection, and low harmonic distortion, it ensures reliable, efficient performance for small and mid-size generator applications.
| Control System | self-excited |
| A.V.R. | HVR30 |
| Voltage Regulation | ± 1 % |
| Sustained Short Circuit | > 300 % of rated current |
| Rated Power Factor | 0,8 |
General Characteristics:
• Three-phase synchronous alternator
• 4-pole, brushless, self-excited
• Electronic AVR voltage regulation
• Rated speed: 1500 rpm (50 Hz) / 1800 rpm (60 Hz)
• Cooling: Self-ventilated
• Protection degree: IP23
• Insulation class: H
• Standards: EN 60034-1, IEC 60034-1, ISO 8528-3
Electrical Specifications:
• Rated Power at 50 Hz: 180 kVA
• Rated Power at 60 Hz: 215 kVA
• Rated voltage: 400/230 V (50 Hz) / 480/277 V (60 Hz)
• Rated current: 115.5 A
• Power factor: 0.8
• Frequency: 50 / 60 Hz
• Phase: Three-phase
• Efficiency:
– 90.2% at 50 Hz
– 91.4% at 60 Hz
• Transient reactance X’’d: 0.078 p.u.
• Harmonic distortion (THD): < 5%
• Winding pitch: 2/3
Excitation & Regulation:
• Brushless excitation with auxiliary winding
• AVR installed inside the terminal box
• 12-lead reconnectable stator winding
• Stable voltage control under load variation
Mechanical Specifications:
• Frame size: 28
• Dimensions:
– Length (L): 804 mm
– Height (H): 630 mm
– Width (W): 520 mm
• Shaft diameter: 42 mm
• Total weight: 239 kg
• Cooling: Shaft-mounted fan
• Mounting: Suitable for single-bearing generator coupling
Operational Performance:
• High stability under sudden load changes
• High electrical efficiency supports reduced fuel consumption
• Suitable for continuous-duty and standby applications
• Compatible with resistive, inductive, and nonlinear loads
Applications:
• Light industrial gensets
• Commercial standby systems
• Rental and construction generators
• Telecom and infrastructure backup power
