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Alternator PRO40S A/4

Linz Electric PRO40S A/4 Alternator – 930 kVA Three-Phase Brushless Synchronous Alternator

The PRO40S A/4 alternator from Linz Electric is a compact and efficient three-phase, 4-pole brushless synchronous alternator designed for industrial and commercial generator applications. Delivering 930 kVA at 50 Hz and 1116 kVA at 60 Hz, it ensures stable voltage regulation, reduced harmonic distortion, and reliable long-term performance. Featuring Class H insulation, IP23 protection, and AVR-controlled excitation, it is suitable for both standby and continuous-duty power systems.

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Alternator Model

PRO40S A/4

50Hz (kVA)

930

60Hz (kVA)

1116
Control Systemself-excited
A.V.R.HVR30
Voltage Regulation± 1 %
Sustained Short Circuit> 300 % of rated current
Rated Power Factor0,8

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 method: 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: 930 kVA

  • Rated Power at 60 Hz: 1116 kVA

  • Rated voltage: 400/230 V (50 Hz) / 480/277 V (60 Hz)

  • Rated current: 216.5 A

  • Power factor: 0.8

  • Frequency: 50 / 60 Hz

  • Phase: Three-phase

  • Efficiency:

    • 92.1% at 50 Hz

    • 93.3% at 60 Hz

  • Short-circuit transient reactance X’’d: 0.068 p.u.

  • Total harmonic distortion (THD): < 5%

  • Winding pitch: 2/3

Excitation & Voltage Regulation

  • Brushless excitation with auxiliary winding

  • AVR installed in the terminal box

  • 12-lead reconnectable winding

  • Stable voltage performance under dynamic load variations

Mechanical Specifications

  • Frame size: 40

  • Dimensions:

    • Length (L): 1028 mm

    • Height (H): 738 mm

    • Width (W): 600 mm

  • Shaft diameter: 65 mm

  • Total weight: 419 kg

  • Cooling: Shaft-mounted fan

  • Mounting: Suitable for single-bearing generator coupling

Operational Performance

  • High voltage stability during sudden load changes

  • High electrical efficiency contributes to reduced fuel usage

  • Suitable for both continuous-duty and standby generator systems

  • Effective performance with resistive, inductive, and nonlinear loads

Applications

  • Industrial generator units

  • Commercial backup and emergency systems

  • Rental and construction gensets

  • Telecommunications, utilities, and infrastructure power supply

Datasheet

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