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Alternator PRO18M E/4

Linz Electric PRO18M E/4 Alternator – 42 kVA Three-Phase High-Efficiency Brushless Alternator

The PRO18M E/4 alternator from Linz Electric is a 4-pole, three-phase, brushless synchronous alternator engineered for professional power generation. Delivering 42 kVA at 50 Hz and 50 kVA at 60 Hz, it offers high performance with AVR-controlled voltage regulation, exceptional efficiency (up to 93%), and <3% THD for clean and stable output. Built with Class H insulation, IP23 protection, and a robust self-excited excitation system, the PRO18M E/4 ensures reliable operation under heavy loads, making it ideal for industrial generator sets and continuous-duty applications.

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Alternator Model

PRO18M E/4

50Hz (kVA)

42

60Hz (kVA)

50
Control Systemself-excited
A.V.R.HVR11-HVR30
Voltage Regulation± 1 %
Sustained Short Circuit> 300 % of rated current
Rated Power Factor0.8

  • General Characteristics:

    The Linz Electric PRO18M E/4 is a heavy-duty, brushless, self-excited synchronous alternator designed for medium and large generator systems. It uses an AVR (HVR11 or HVR30) to maintain voltage regulation within ±1% under dynamic load conditions. Designed to run at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), this alternator meets EN60034-1, ISO 8528-3, and EN55011 standards, ensuring compliance with global industrial requirements.

  • Electrical Specifications:

    • Rated Power: 42 kVA (50 Hz) / 50 kVA (60 Hz)

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

    • Frequency: 50 / 60 Hz

    • Rated Power Factor: 0.8

    • Efficiency (Class H): 90.5% – 93% depending on load

    • Total Harmonic Distortion (THD): <3% (full load & no load)

    • Voltage Regulation: ±1% via AVR

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

    • Overload Capacity: 110% for 1 hour every 6 hours

    • Cooling Air Requirement: 12–14 m³/min depending on frequency

    • RFI Suppression: EN55011 standard compliant

  • Winding and Excitation System:

    • Stator Type: Double-layer winding with auxiliary winding

    • Rotor: Winding with dampening cage for stability

    • Winding Pitch: 2/3

    • Number of Leads: 12

    • Stator Resistance: 0.035 Ω at 20°C

    • Rotor Resistance: 3.10 Ω at 20°C

    • Exciter Stator Resistance: 10.8 Ω

    • Exciter Rotor Resistance: 0.55 Ω

    • Excitation Current: 1.25 A (no load) / 3.10 A (full load)

  • Reactances and Time Constants (50 Hz):

    • Xd: 215% – 142%

    • X’d: 16.8% – 10.9%

    • X’’d: 5.8% – 3.9%

    • Xq: 122% – 87%

    • T’do: 115 ms

    • T’d: 9 ms

    • T’’d: 6 ms

  • Mechanical Specifications:

    • Frame Forms: B2, B3/B14, B3/B9

    • Weight: 278–290 kg depending on frame

    • Moment of Inertia: 0.64–0.70 kg·m² depending on flange/base

    • Bearings:

    • Drive End: 6310-2RS-C3

    • Non-Drive End: 6308-2RS-C3

      • Cooling Method: Self-ventilated airflow

      • Maximum Overspeed: 2250 rpm

  • Performance and Efficiency:

    • Efficiency (50 Hz):

    • 25% load: ~89%

    • 50% load: ~92%

    • 75% load: ~92.8%

    • 100% load: 93%

      • Efficiency (60 Hz): Up to 93.5% at full load

      • Transient Voltage Dip: <25%, recovery time <0.5 s

  • Environmental and Operational Conditions:

    • Nominal Ambient Temperature: 40°C

    • Altitude Derating: Begins >1000 m

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

    • Protection Degree: IP23

    • Complies with EN vibration and mechanical balancing norms

  • Certifications and Compliance:

    • EN60034-1

    • ISO 8528-3

    • EN55011 (EMC)

    • Optional: UL 1446, CSA-C22.2 No.100, UL1004-1, UL1004-4

The PRO18M E/4 combines high efficiency, robust electrical stability, and strong mechanical construction, making it an excellent choice for industrial generator sets requiring consistent, clean, and dependable power output.

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