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Alternator PRO18L G/4

Linz Electric PRO18L G/4 Alternator – 60 kVA Three-Phase High-Efficiency Brushless Alternator

The PRO18L G/4 alternator from Linz Electric is a robust 4-pole, three-phase, brushless synchronous alternator engineered for industrial generator applications. Delivering 60 kVA at 50 Hz and 72 kVA at 60 Hz, it provides excellent voltage stability with AVR regulation, low harmonic distortion (<3% THD), and high operating efficiency (up to 92%). Built with Class H insulation, IP23 protection, and a self-excited excitation system, the PRO18L G/4 ensures reliable, long-lasting performance even under demanding load and environmental conditions.

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Alternator Model

PRO18L G/4

50Hz (kVA)

60

60Hz (kVA)

72
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 PRO18L G/4 is a brushless, self-excited, three-phase synchronous alternator designed for medium-to-heavy-duty generator sets. It uses an AVR-controlled excitation system (HVR11 or HVR30) that maintains ±1% voltage regulation accuracy. Operating at 1500 rpm (50 Hz) or 1800 rpm (60 Hz), the alternator is fully compliant with EN60034-1, ISO 8528-3, and EN55011 standards.

  • Electrical Specifications:

    • Rated Power: 60 kVA (50 Hz) / 72 kVA (60 Hz)

    • Frequency: 50 / 60 Hz

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

    • Power Factor: 0.8

    • Efficiency (Class H): 89.5% – 92.5%, depending on load and frequency

    • THD (Total Harmonic Distortion): <3% at no-load and full-load

    • Voltage Regulation: ±1% with AVR

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

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

    • RFI Compliance: EN55011

    • Cooling Air Requirement: 11.5–13 m³/min depending on frequency

  • Winding and Excitation System:

    • Stator: Double-layer winding with auxiliary winding

    • Rotor: Winding with damping cage to ensure stability

    • Winding Pitch: 2/3

    • Number of Leads: 12 (flexible reconnection)

    • Stator Resistance: 0.037 Ω @ 20°C

    • Rotor Resistance: 3.45 Ω @ 20°C

    • Exciter Stator Resistance: 10.8 Ω

    • Exciter Rotor Resistance: 0.55 Ω

    • Excitation Current: 1.13 A (no-load) / 2.89 A (full-load)

  • Reactances & Time Constants (50 Hz):

    • Xd: 225% – 152%

    • X’d: 17.8% – 12.0%

    • X’’d: 6.3% – 4.2%

    • Xq: 130% – 92%

    • T’do: 121 ms

    • T’d: 9 ms

    • T’’d: 6 ms

  • Mechanical Specifications:

    • Frame Forms: B2, B3/B14, B3/B9

    • Weight: 255–264 kg depending on frame form

    • Moment of Inertia: 0.510–0.560 kg·m² depending on mounting

    • Bearings:

    • Drive End: 6309-2RS-C3

    • Non-Drive End: 6307-2RS-C3

      • Cooling Method: Self-ventilated

      • Maximum Overspeed: 2250 rpm

  • Performance and Efficiency:

    • Efficiency (50 Hz):

    • 25% load: ~88%

    • 50% load: 91%

    • 75% load: 92.3%

    • Full load: up to 92.5%

      • Efficiency (60 Hz):

    • Up to 93% at full load

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

  • Environmental & Operational Conditions:

    • Nominal Ambient Temperature: 40°C

    • Altitude Derating: Begins above 1000 m

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

    • Protection Degree: IP23

    • Vibration and noise compliant with EN standards

  • Certifications:

    • EN60034-1

    • ISO 8528-3

    • EN55011 (conducted and radiated emissions)

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

Datasheet

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