L’**A.R.K7E** d’Arken Power Solutions est un alternateur synchrone triphasé sans balais à **excitation PMG** avec **AVR MX321**, offrant une régulation de tension **±1 %**, un **THD < 5 %** et un rendement jusqu’à **96 %**. Conçu avec isolation **classe H**, protection **IP23** et roulements graissés à vie, il fournit une puissance stable et fiable pour les applications **industrielles, de location et de secours**.
| 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, self-excited synchronous alternator with PMG excitation
Frequency: 50 / 60 Hz
Power Factor: 0.8
Voltage Range: 380/220V – 480/277V (reconnectable 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 96.1%
Overload Capacity: 110% for one hour in a six-hour period
Telephone Harmonic Factor (THF): <2%
Telephone Interference Factor (TIF): <50
Short Circuit Ratio (1/Xd): 0.20
Reactances (Per Unit at Rated kVA):
Xd (Synchronous): 2.28–3.28
X’d (Transient): 0.18–0.21
X’’d (Subtransient): 0.17–0.19
Xq (Quadrature): 2.05–3.17
X’’q (Quadrature Subtransient): 0.22–0.27
X₂ (Negative Sequence): 0.14–0.16
X₀ (Zero Sequence): 0.04–0.05
Leakage Reactance (XL): 0.03–0.04
Time Constants:
Transient (T’d): 0.29 s
Subtransient (T’’d): 0.05 s
Armature (Ta): 0.04 s
Open Circuit Field (T’do): 2.98 s
Voltage Regulation Accuracy: ±1.0%
Voltage Waveform: <1.5% THD (no-load), <5.0% THD (linear load)
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 system
50 Hz: 2.64 m³/s (4619 cfm)
60 Hz: 3.17 m³/s (5573 cfm)
Frame: Rigid steel structure with cast aluminum front and rear covers
Stator: Double-layer winding with 2/3 pitch design eliminating triple harmonics
Rotor: Damped rotor dynamically balanced per BS6861 standards
Bearings:
Drive End: 6319 (ISO, sealed-for-life ball bearing)
Non-Drive End: 6228 (ISO, sealed-for-life ball bearing)
Overspeed Capability: 120% of rated speed (2250 rpm)
Leads: 12 reconnectable leads for star, delta, or parallel star configuration
Inertia (WR²): 32.0076–33.0084 kg·m²
Cooling Air Requirement: 2.64 m³/s (50Hz), 3.17 m³/s (60Hz)
Winding Resistance:
Stator: 0.0016 Ω/phase (22°C, star connection)
Rotor: 1.27 Ω (22°C)
Dimensions & Weight
Rotor Weight: 1129 kg
Stator Weight: 1387 kg
Complete Alternator Weight: 2816–2885 kg
Shipping Weight (Crated): 2819 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: 95.1–96.1%
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, refrigeration, railway, and lighting tower generator systems
