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Alternator PRO40S B/4

Linz Electric PRO40S B/4 Alternator – 1050 kVA Three-Phase Brushless Synchronous Alternator

The PRO40S B/4 alternator from Linz Electric is a high-efficiency three-phase, 4-pole brushless synchronous alternator designed for industrial and commercial generator systems. Delivering 1050 kVA at 50 Hz and 1260 kVA at 60 Hz, it provides stable voltage regulation, low harmonic distortion, and long-term performance. With Class H insulation, IP23 protection, and AVR-regulated excitation, it ensures reliable power for both standby and continuous-duty applications.

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Alternator Model

PRO40S B/4

50Hz (kVA)

1050

60Hz (kVA)

1260
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: 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: 1050 kVA

  • Rated Power at 60 Hz: 1260 kVA

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

  • Rated current: 247.0 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 inside terminal box

  • 12-lead reconnectable winding

  • Stable voltage under sudden 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: 439 kg

  • Cooling: Shaft-mounted fan

  • Mounting: Suitable for single-bearing generator applications

Operational Performance

  • Excellent voltage stability under sudden load changes

  • High operational efficiency supports fuel savings

  • Suitable for continuous-duty and standby power systems

  • Compatible with resistive, inductive, and nonlinear loads

Applications

  • Industrial generator units

  • Commercial backup/emergency systems

  • Rental & construction gensets

  • Utility, telecom, and infrastructure power support

Datasheet

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