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Alternator PRO18S C/4

Linz Electric PRO18S C/4 Alternator – 30 kVA Three-Phase Brushless Alternator with AVR

The PRO18S C/4 alternator from Linz Electric is a 4-pole, three-phase brushless synchronous alternator engineered for industrial generator systems. Delivering 30 kVA at 50 Hz and 36 kVA at 60 Hz, it provides clean and stable electrical output with AVR-controlled voltage regulation, low THD (<3%), and high efficiency. Built with Class H insulation, IP23 protection, and a durable self-excited excitation system, the PRO18S C/4 is designed for long-term performance in demanding commercial and industrial applications.

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Alternator Model

PRO18S C/4

50Hz (kVA)

30

60Hz (kVA)

36
Control Systemself-excited
A.V.R.HVR11-HVR30
Voltage Regulation± 1 %
Sustained Short Circuit> 250 % of rated current
Rated Power Factor0.8

  • General Characteristics:

    The Linz Electric PRO18S C/4 is a heavy-duty, brushless, self-excited synchronous alternator designed for medium-scale generator sets. It features AVR regulation (HVR11 or HVR30), ensuring voltage stability within ±1%. Operating at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), it complies with EN60034-1, ISO 8528-3, and EN55011 standards for electrical, mechanical, and EMC performance.

  • Electrical Specifications:

    • Rated Power: 30 kVA (50 Hz) / 36 kVA (60 Hz)

    • Rated Voltage (Star): 380–480 V

    • Frequency: 50 Hz / 60 Hz

    • Power Factor: 0.8

    • Efficiency (Class H): up to 90.5%

    • Total Harmonic Distortion (THD): <3%

    • Voltage Regulation: ±1%

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

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

    • RFI Suppression: EN55011 compliant

    • Cooling Air Requirement: 8.8–10 m³/min

  • Winding & Excitation System:

    • Stator: Double-layer winding with auxiliary winding

    • Rotor: Winding with damping cage for improved stability

    • Winding Pitch: 2/3

    • Leads: 12 (reconnectable)

    • Stator Resistance: 0.084 Ω @ 20°C

    • Rotor Resistance: 5.62 Ω @ 20°C

    • Exciter Stator Resistance: 15.0 Ω

    • Exciter Rotor Resistance: 1.87 Ω

    • Excitation Current: 0.89 A (no load) / 2.02 A (full load)

  • Reactances & Time Constants (50 Hz):

    • Xd: 275% – 170%

    • X’d: 22.8% – 13.4%

    • X’’d: 7.4% – 4.6%

    • Xq: 145% – 102%

    • T’do: 202 ms

    • T’d: 14 ms

    • T’’d: 7 ms

  • Mechanical Specifications:

    • Frame Forms: B2, B3/B14, B3/B9

    • Weight: 203–210 kg, depending on frame form

    • Moment of Inertia: 0.260–0.300 kg·m²

    • Bearings:

    – Drive End: 6308-2RS-C3

    – Non-Drive End: 6306-2RS-C3

    • Maximum Overspeed: 2250 rpm

    • Cooling System: Self-ventilated airflow

  • Performance & Efficiency:

    • Efficiency (50 Hz):

    – 25% load: ~87%

    – 50% load: ~89%

    – 75% load: ~90%

    – Full load: ~90.5%

    • Efficiency (60 Hz): up to 91%

    • Transient Load Behavior: <25% voltage dip with <0.5 s recovery

    • Low waveform distortion thanks to 2/3 pitch winding

  • Environmental & Operating Conditions:

    • Nominal Ambient Temperature: 40°C

    • Altitude Derating: Above 1000 m

    • Protection Degree: IP23

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

    • Complies with EN vibration and rotor balance specifications

  • Certifications:

    • EN60034-1

    • ISO 8528-3

    • EN55011

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

Datasheet

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