L’alternateur PRO18L F/4 délivre 50 kVA à 50 Hz et 60 kVA à 60 Hz, avec AVR pour une régulation précise, un rendement élevé (jusqu’à 92 %) et un THD < 3 %. Doté d’une isolation classe H, d’une protection IP23 et d’un système d’excitation auto-excité, il assure une durabilité à long terme pour les groupes électrogènes industriels.
| Système d’excitation | self-excited |
| A.V.R. | HVR11 or HVR30 |
| Régulation de tension à régime établi | ± 1 % |
| Court-circuit prolongé | > 250 % of rated current |
| Facteur de puissance nominal | 0.8 |
General Characteristics:
The Linz Electric PRO18L F/4 is a self-excited, brushless, three-phase synchronous alternator engineered for heavy-duty generator systems. It operates with an AVR-controlled excitation system (models HVR11 or HVR30) that maintains voltage stability within ±1 %. Designed for 1500 rpm (50 Hz) or 1800 rpm (60 Hz), it provides a power factor of 0.8 and complies with EN60034-1, ISO 8528-3, and EN55011 standards.
Electrical Specifications:
• Rated Power: 50 kVA (50 Hz) / 60 kVA (60 Hz)
• Rated Power Factor: 0.8
• Rated Voltage Range (Star Connection): 380 – 480 V
• Frequency: 50 Hz / 60 Hz
• Efficiency (Class H): 89.4 % – 91.2 % at 50 Hz / 90 % – 92 % at 60 Hz
• Total Harmonic Distortion (THD): < 3 % at full and no load
• Voltage Regulation Accuracy: ± 1 %
• Sustained Short-Circuit Capability: > 250 % of rated current
• Overload Capacity: 110 % for one hour every six hours
• Air Flow Requirement: 10 m³/min (50 Hz) / 11.5 m³/min (60 Hz)
• RFI Suppression: EN55011 compliant
Winding and Excitation System:
• Stator Type: Double-layer with auxiliary winding
• Rotor Type: Winding with damping cage
• Winding Pitch: 2/3
• Number of Leads: 12
• Stator Winding Resistance: 0.05 Ω @ 20 °C
• Rotor Winding Resistance: 4.53 Ω @ 20 °C
• Exciter Stator Resistance: 13 Ω @ 20 °C
• Exciter Rotor Resistance: 0.72 Ω @ 20 °C
• Excitation Current: 0.91 A (no load) / 2.25 A (full load)
Reactances and Time Constants (50 Hz):
• Xd (Direct Axis Synchronous): 283 % – 177 % depending on connection
• X’d (Transient): 22.2 % – 13.9 %
• X’’d (Subtransient): 7.8 % – 4.9 %
• Xq (Quadrature Axis): 162 % – 101 %
• T’do (Open Circuit Field Time Constant): 188 ms
• T’d (Transient Time Constant): 14 ms
• T’’d (Sub-Transient Time Constant): 9 ms
Mechanical Specifications:
• Frame Forms: B2, B3/B14, B3/B9
• Weight: 236.5 kg (B2) / 238.5 kg (B3/B14)
• Moment of Inertia: 0.436 kg·m² (B3/B14) / 0.441 – 0.486 kg·m² (SAE 7½ – 11½)
• Bearings: Drive End – 6309-2RS-C3 / Non-Drive End – 6307-2RS-C3
• Cooling Method: Self-ventilated air cooling
• Maximum Overspeed: 2250 rpm
Performance and Efficiency:
• Efficiency (Class H): 85.8 % at 25 % load, 90.0 % at 75 % load, 91.2 % at full load (50 Hz)
• Efficiency (Class H): 86.2 % at 25 % load, 92.0 % at full load (60 Hz)
• Voltage Dip (Transient Load Step): < 25 % with recovery time < 0.5 s
• Stable voltage and frequency across variable loads
Environmental and Operational Conditions:
• Ambient Temperature: 40 °C
• Altitude Derating: Power derating above 1000 m
• Insulation Class: H (125 °C rise)
• Protection Degree: IP23
• Compliance with EN vibration and balance standards
Certifications and Compliance:
• Standards: EN60034-1, ISO 8528-3, EN55011
• Optional Certifications: UL 1446, CSA-C22.2 No. 100, UL1004-1, UL1004-4
