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Alternator PRO35S B/4

Linz Electric PRO35S B/4 Alternator – 450 kVA Three-Phase Brushless Synchronous Alternator

The PRO35S B/4 alternator from Linz Electric is a reliable three-phase, 4-pole brushless synchronous alternator designed for professional generator applications. Delivering 450 kVA at 50 Hz and 540 kVA at 60 Hz, it ensures stable voltage regulation, low harmonic distortion, and high electrical efficiency. Built with Class H insulation, IP23 protection, and AVR-controlled excitation, it is ideal for industrial, commercial, and standby power systems.

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Alternator Model

PRO35S B/4

50Hz (kVA)

450

60Hz (kVA)

540
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

  • Standards: EN 60034-1, IEC 60034-1, ISO 8528-3

Electrical Specifications

  • Rated Power at 50 Hz: 450 kVA

  • Rated Power at 60 Hz: 540 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:

    • 91.1% at 50 Hz

    • 92.3% at 60 Hz

  • Short-circuit transient reactance X’’d: 0.070 p.u.

  • Harmonic distortion (THD): < 5%

  • Winding pitch: 2/3

Excitation & Voltage Regulation

  • Brushless excitation with auxiliary winding

  • AVR positioned inside terminal box

  • 12-lead reconnectable stator winding

  • Stable voltage output under dynamic load changes

Mechanical Specifications

  • Frame size: 35

  • Dimensions:

    • Length (L): 993 mm

    • Height (H): 690 mm

    • Width (W): 560 mm

  • Shaft diameter: 55 mm

  • Total weight: 349 kg

  • Cooling: Shaft-mounted fan

  • Mounting: Compatible with single-bearing generator coupling

Operational Performance

  • Excellent voltage stability during sudden load application

  • High electrical efficiency reduces generator fuel consumption

  • Suitable for continuous-duty and standby operation

  • Performs effectively with resistive, inductive, and nonlinear loads

Applications

  • Industrial generator units

  • Commercial backup power

  • Rental and construction gensets

  • Telecom, utilities, and infrastructure support

Datasheet

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