Alternateur A.R.K7F

A.R.K7F Alternateur – Alternateur Heavy-Duty Sans Balais à Excitation PMG Haute Efficacité

L’A.R.K7F est un alternateur synchrone triphasé sans balais, heavy-duty, équipé d’une excitation PMG et d’un AVR MX321 pour une régulation de tension très précise et une excellente réponse dynamique. Avec ±1 % de régulation, un THD < 5 % et un rendement jusqu’à 96,4 %, il fournit une puissance propre, stable et hautement efficace pour les systèmes industriels, de location, télécom et standby. Construit avec classe H, IP23 et roulements graissés à vie, il est conçu pour une fiabilité maximale dans les environnements les plus exigeants.

Demander un devis

Alternator Model

A.R.K7F

50Hz (kVA)

1500

60Hz (kVA)

1775
Système d’excitation SELF EXCITED
A.V.R. MX341 WITH PMG
Régulation de tension à régime établi ± 1.0 %
Court-circuit prolongé >300% OF RATED CURRENT
Facteur de puissance nominal 0.8

Electrical Performance

  • Type: Three-phase, brushless synchronous alternator with PMG excitation

  • Frequency: 50 / 60 Hz

  • Power Factor: 0.8

  • Voltage Range: 380/220V – 480/277V (configurable in star, delta, or parallel star)

  • Voltage Regulation: ±1.0%

  • Total Harmonic Distortion (THD): <5% (balanced linear load), <1.5% (no-load)

  • Sustained Short Circuit Current: >300% rated current for 10 seconds

  • Efficiency: Up to 96.4% depending on frequency and load

  • Overload Capacity: 110% for one hour in a six-hour cycle

  • Telephone Harmonic Factor (THF): <2%

  • Telephone Interference Factor (TIF): <50

  • Short Circuit Ratio (1/Xd): 0.19 typical

  • Power Ratings (Winding 311):

    • 50 Hz: 1100–1375 kVA (Efficiency 96.0–96.4%)

    • 60 Hz: 1250–1650 kVA (Efficiency 95.7–96.2%)

  • Reactances (Per Unit at Rated kVA):

    • Xd (Synchronous): 2.26–3.23

    • X’d (Transient): 0.18–0.25

    • X’’d (Subtransient): 0.07–0.13

    • Xq (Quadrature): 2.04–3.16

    • X’’q (Quadrature Subtransient): 0.22–0.27

    • X₂ (Negative Sequence): 0.14–0.16

    • X₀ (Zero Sequence): 0.04–0.06

    • Leakage Reactance (XL): 0.03

  • Time Constants:

    • Transient (T’d): 0.3 s

    • Subtransient (T’’d): 0.03 s

    • Armature (Ta): 0.06 s

    • Open Circuit Field (T’do): 3.16 s

Construction & Design

  • Insulation Class: H (125°C rise at 40°C ambient)

  • Protection: IP23 (optional IP44 with 5–10% power reduction)

  • Cooling: Self-ventilated air cooling

    • 50 Hz: 2.64 m³/s (5600 cfm)

    • 60 Hz: 3.17 m³/s (6720 cfm)

  • Frame: Rigid steel structure with cast aluminum front and rear covers

  • Stator: Double-layer winding, 2/3 pitch design eliminates triple harmonics

  • Rotor: Damped rotor dynamically balanced to BS6861 standards

  • Bearings:

    • Drive End: 6319 (sealed-for-life ball bearing)

    • Non-Drive End: 6228 (sealed-for-life ball bearing)

  • Overspeed Capability: 120% of rated speed (2250 rpm)

  • Leads: 12 reconnectable leads (star, delta, or parallel star)

  • Inertia (WR²): 36.49–37.49 kg·m²

  • Winding Resistance:

    • Stator: 0.00126 Ω/phase (22°C, star connection)

    • Rotor: 1.41 Ω (22°C)

Dimensions & Weight

  • Rotor Weight: 1181–1244 kg

  • Stator Weight: 1541 kg

  • Complete Alternator Weight: 2982–3130 kg

  • Shipping Weight (Crated): 3054–3070 kg

  • Packing Dimensions: 194 × 105 × 154 cm

Regulation & Control

  • Excitation System: PMG excitation with brushless AVR

  • AVR Models: MX321 (standard), optional MX341, SX440, SX460, AS440

  • Voltage Regulation Accuracy: ±1.0%

  • Parallel Operation: Supported (AVR-dependent)

  • Protection Features:

    • Stator winding and bearing overheat protection

    • Anti-condensation heater (optional)

    • Low-speed voltage drop protection

  • RFI Suppression: Complies with BS EN 61000-6-2 & BS EN 61000-6-4, VDE 0875G/N

  • Standards Compliance: IEC60034, GB755, BS5000, NEMA MG1-22, CSA C22.2-100, AS1359

  • Certification: ISO9001 Quality Management System

Environmental Parameters

  • Operating Temperature: –15°C to +40°C

  • Relative Humidity: Up to 95% (non-condensing)

  • Altitude: Up to 1000 m without derating

  • Cooling Air Requirement: 2.64–3.17 m³/s depending on frequency

  • Noise & Vibration: Dynamically balanced per BS6861 mechanical standards

Performance Summary

  • Efficiency Range: 95.7–96.4%

  • Voltage Dip (Transient Load): ≤25% at 0.8 PF

  • Recovery Time: <0.5 seconds

  • Locked Rotor Motor Starting: >300% rated current

  • Applications: Prime power, standby, rental, telecom, mobile, railway, lighting tower, and refrigeration generator systems

Datasheet

Download

Produits associés