Генератор PRO18S A/4

• General Characteristics:

  The Linz Electric PRO18S A/4 is a compact, brushless, self-excited, three-phase synchronous alternator developed for small-to-medium industrial generator sets. It utilizes an AVR-based regulation system (HVR11 or HVR30) ensuring ±1% voltage stability. Designed to operate at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), the alternator complies with EN60034-1, ISO 8528-3, and EN55011 standards for electrical performance and EMC.

• Electrical Specifications:

  • Rated Power: 40 kVA (50 Hz) / 48 kVA (60 Hz)

  • Voltage Range (Star Connection): 380–480 V

  • Frequency: 50 / 60 Hz

  • Power Factor: 0.8

  • Efficiency (Class H): up to 89% depending on load

  • Total Harmonic Distortion (THD): <3%

  • Voltage Regulation: ±1%

  • Sustained Short-Circuit Current: >250% of rated current

  • Overload Capacity: 110% for 1 hour per 6-hour cycle

  • Required Cooling Airflow: 7–8 m³/min depending on frequency

  • RFI/EMC: Compliant with EN55011

• Winding and Excitation System:

  • Stator: Double-layer winding with auxiliary (pilot) winding

  • Rotor: Cage-damped winding for dynamic stability

  • Winding Pitch: 2/3

  • Number of Leads: 12 (reconnectable configurations)

  • Stator Resistance: 0.13 Ω at 20°C

  • Rotor Resistance: 6.85 Ω at 20°C

  • Exciter Stator Resistance: 15.0 Ω

  • Exciter Rotor Resistance: 1.87 Ω

  • Excitation Current: 0.82 A (no-load) / 1.80 A (full-load)

• Reactances & Time Constants (50 Hz):

  • Xd: 325% – 202%

  • X’d: 24% – 15.4%

  • X’’d: 8.4% – 5.2%

  • Xq: 166% – 112%

  • T’do: 236 ms

  • T’d: 15 ms

  • T’’d: 7 ms

• Mechanical Specifications:

  • Frame Forms: B2, B3/B14, B3/B9

  • Weight: 182–188 kg depending on frame type

  • Moment of Inertia: 0.220–0.250 kg·m²

  • Bearings:

  • Drive End: 6308-2RS-C3

  • Non-Drive End: 6306-2RS-C3

    • Cooling: Self-ventilated airflow

    • Maximum Overspeed: 2250 rpm

• Performance and Efficiency:

  • Efficiency at 50 Hz:

  • 25% load: ~86%

  • 50% load: ~88%

  • 75% load: ~89%

  • 100% load: 88–89%

    • Efficiency at 60 Hz: up to 90%

    • Transient Voltage Dip (step load): <25% with <0.5 s recovery

    • Very stable voltage waveform due to low THD and 2/3 pitch winding

• Environmental & Operating Conditions:

  • Rated Ambient Temperature: 40°C

  • Altitude Derating: Above 1000 m

  • Insulation Class: Class H (125°C rise)

  • Protection: IP23

  • Vibration: EN-compliant rotor dynamic balancing

• Certifications & Compliance:

  • EN60034-1

  • ISO 8528-3

  • EN55011 (EMC)

  • Optional: UL 1446, CSA-C22.2 No.100, UL1004 series

The PRO18S A/4 alternator is designed for applications requiring compact size, low harmonic distortion, stable AVR-controlled voltage, and long-term durability, making it ideal for both stationary and mobile generator systems.