L’A.R.K164D est un alternateur synchrone triphasé sans balais et auto-excité, conçu pour les groupes électrogènes compacts de petite et moyenne puissance. Il assure une régulation de tension ±1 %, un THD < 5 % et un rendement jusqu’à 83 %, garantissant une énergie stable et propre pour le service continu ou de secours. Avec classe H, IP23 et roulements graissés à vie, il offre durabilité et faible maintenance.
| Système d’excitation | SELF EXCITED |
| A.V.R. | OPTIONAL SX440 |
| 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, self-excited synchronous alternator
Frequency: 50 / 60 Hz
Power Factor: 0.8
Voltage Range: 190–480 V (configurable in star, delta, or parallel star connection)
Voltage Regulation: ±1.0%
Total Harmonic Distortion (THD): <5% (balanced linear load), <1.5% (no-load)
Sustained Short Circuit Current: >300% of rated current
Efficiency: Up to 83.2% (depending on frequency and voltage)
Telephone Harmonic Factor (THF): <2%
Telephone Interference Factor (TIF): <50
Excitation System: Self-excited, AVR-controlled
AVR Models: SX460 (standard), SX440 (optional), MX341 (PMG optional)
Short Circuit Ratio (1/Xd): 6.2–8.9 typical
Reactances (Per Unit at Rated kVA)
Xd (Synchronous): 1.734–2.272
X’d (Transient): 0.164–0.231
X’’d (Subtransient): 0.103–0.146
Xq (Quadrature): 0.800–1.129
X’’q (Quadrature Subtransient): 0.185–0.260
X₂ (Negative Sequence): 0.154–0.218
X₀ (Zero Sequence): 0.070–0.098
Leakage Reactance (XL): 0.065–0.092
Time Constants:
Transient (T’d): 0.014 s
Subtransient (T’’d): 0.0035 s
Armature (Ta): 0.004 s
Open Circuit Field (T’do): 0.25 s
Construction & Design
Insulation Class: H (125°C rise at 40°C ambient)
Protection: IP23 (optional IP44 with 5–10% derating)
Cooling: Self-ventilated air cooling
50 Hz: 0.071 m³/s (150 cfm)
60 Hz: 0.09 m³/s (191 cfm)
Frame: Steel structure with cast aluminum front and rear covers
Stator: Double-layer winding with auxiliary winding, 2/3 pitch eliminates triple harmonics
Rotor: Damped cage rotor, dynamically balanced to BS6861 standards
Bearings:
Drive End: 6309-2RS (ISO, sealed-for-life ball bearing)
Non-Drive End: 6306-2RS (ISO, sealed-for-life ball bearing)
Overspeed Capability: 120% of rated speed (2250 rpm)
Leads: 12 reconnectable leads (star, delta, or parallel star configuration)
Stator Resistance: 0.645 Ω/phase (22°C, star connection)
Rotor Resistance: 0.56 Ω (22°C)
Rotor Inertia (WR²): 0.1278–0.1279 kg·m²
Dimensions & Weight
Rotor Weight: 33.7–34.5 kg
Stator Weight: 34.5 kg
Complete Alternator Weight: 109–112 kg (depending on bearing configuration)
Shipping Weight: 116–122 kg (crated)
Packing Dimensions: 64 × 54 × 72 cm
Regulation & Control
Excitation: Self-excited, AVR-controlled
AVR Models: SX460 (standard), SX440 / MX341 / MX321 optional
Voltage Regulation Accuracy: ±1.0%
Parallel Operation: Supported (AVR-dependent)
RFI Suppression: BS EN 61000-6-2 & BS EN 61000-6-4, VDE 0875G/N compliant
Standards Compliance: IEC60034, GB755, BS5000, VDE0530, 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: 0.071–0.09 m³/s depending on frequency
Noise & Vibration: Balanced per BS6861 mechanical standards
Performance Summary
Efficiency Range: 78–83%
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, lighting tower, refrigeration, and railway generator systems
