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Alternator PRO35M G/4

Linz Electric PRO35M G/4 Alternator – 725 kVA Three-Phase Brushless Synchronous Alternator

The PRO35M G/4 alternator from Linz Electric is a high-performance three-phase, 4-pole brushless synchronous alternator designed for industrial generator systems. Delivering 725 kVA at 50 Hz and 870 kVA at 60 Hz, it ensures reliable voltage regulation, low harmonic distortion, and excellent operating efficiency. Engineered with Class H insulation, IP23 protection, and AVR-controlled excitation, it is ideal for robust, continuous-duty and standby power applications.

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Alternator Model

PRO35M G/4

50Hz (kVA)

725

60Hz (kVA)

870
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 system: Self-ventilated

  • Protection class: IP23

  • Insulation class: H

  • Compliance with: EN 60034-1, IEC 60034-1, ISO 8528-3

Electrical Specifications

  • Rated Power at 50 Hz: 725 kVA

  • Rated Power at 60 Hz: 870 kVA

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

  • Rated current: 505.1 A

  • Frequency: 50 / 60 Hz

  • Phase: Three-phase

  • Power factor: 0.8

  • Efficiency:

    • 94.0% at 50 Hz

    • 94.9% at 60 Hz

  • Transient reactance X’’d: 0.056 p.u.

  • Harmonic distortion (THD): < 5%

  • Winding pitch: 2/3

Excitation & Voltage Regulation

  • Brushless excitation with auxiliary winding

  • AVR installed in terminal box

  • 12-lead reconnectable stator winding

  • Stable voltage behavior under dynamic load variation

Mechanical Specifications

  • Frame size: 35

  • Dimensions:

    • Length (L): 1148 mm

    • Height (H): 806 mm

    • Width (W): 660 mm

  • Shaft diameter: 65 mm

  • Total weight: 610 kg

  • Cooling: Shaft-mounted fan

  • Mounting: Suitable for single-bearing coupling systems

Operational Performance

  • Excellent voltage stability during sudden load steps

  • High electrical efficiency improves generator fuel economy

  • Suitable for continuous-duty and standby operation

  • Compatible with resistive, inductive, and nonlinear loads

Applications

  • Industrial generator systems

  • Heavy commercial backup power

  • Rental and construction power units

  • Telecom, utility, and infrastructure backup systems

Datasheet

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