Генератор ARK6D

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 (configurable in star, delta, or parallel star)

• Voltage Regulation: ±1.0%

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

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

• Efficiency: 94.5–95.6% depending on load and frequency

• 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): 0.09 typical

• Power Ratings (Winding 311):

  • 50 Hz: 830–1000 kVA (Efficiency 95.2–95.6%)

  • 60 Hz: 913–1219 kVA (Efficiency 94.5–95.4%)

• Reactances (Per Unit at Rated kVA):

  • Xd (Synchronous): 2.70–3.37

  • X’d (Transient): 0.19–0.23

  • X’’d (Subtransient): 0.08–0.10

  • Xq (Quadrature): 1.77–3.13

  • X’’q (Quadrature Subtransient): 0.18–0.25

  • X₂ (Negative Sequence): 0.16–0.20

  • X₀ (Zero Sequence): 0.08–0.10

  • Leakage Reactance (XL): 0.02–0.03

• Time Constants:

  • Transient (T’d): 0.18 s

  • Subtransient (T’’d): 0.025 s

  • Armature (Ta): 0.04 s

  • Open Circuit Field (T’do): 2.44 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: 1.614 m³/s (3420 cfm)

  • 60 Hz: 1.961 m³/s (4156 cfm)

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

• Stator: Double-layer winding, 2/3 pitch eliminates 3rd, 9th, and 15th harmonics

• Rotor: Damped rotor dynamically balanced per BS6861 standards

• Bearings:

  • Drive End: 6224 (ISO, sealed-for-life ball bearing)

  • Non-Drive End: 6317 (ISO, sealed-for-life ball bearing)

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

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

• Inertia (WR²): 19.4965 kg·m² (2-bearing) / 20.0438 kg·m² (1-bearing)

• Cooling Air Requirement: 1.614–1.961 m³/s

• Winding Resistance:

  • Stator: 0.003 Ω/phase (22°C, star connection)

  • Rotor: 1.88 Ω (22°C)

Dimensions & Weight

• Rotor Weight: 866–1010 kg

• Stator Weight: 1010 kg

• Complete Alternator Weight: 2117–2180 kg

• Shipping Weight (Crated): 2145–2173 kg

• Packing Dimensions: 183 × 92 × 140 cm

Regulation & Control

• Excitation System: PMG excitation with brushless design

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

• Voltage Regulation Accuracy: ±1.0%

• Parallel Operation: Supported (AVR-dependent)

• Protection Features:

  • Stator winding and bearing overheat protection

  • Anti-condensation heater (optional)

• 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: 1.614 m³/s (50Hz), 1.961 m³/s (60Hz)

• Noise & Vibration: Balanced to BS6861 mechanical standards

Performance Summary

• Efficiency Range: 94.5–95.6%

• 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, railway, and refrigeration generator systems