Генератор A.R.K6B

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 (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: 93.0%–94.2% (depending on load and frequency)

• 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): 0.09 typical

• Power Ratings (Winding 311):

  • 50 Hz: 651–855 kVA (93.6–94.2% efficiency range)

  • 60 Hz: 710–970 kVA (93.0–93.6% efficiency range)

• Reactances (Per Unit at Rated kVA):

  • Xd (Synchronous): 2.42–3.12

  • X’d (Transient): 0.15–0.20

  • X’’d (Subtransient): 0.10–0.15

  • Xq (Quadrature): 2.60–2.94

  • X’’q (Quadrature Subtransient): 0.20–0.28

  • X₂ (Negative Sequence): 0.18–0.22

  • X₀ (Zero Sequence): 0.09

  • Leakage Reactance (XL): 0.03

• Time Constants:

  • Transient (T’d): 0.106 s

  • Subtransient (T’’d): 0.013 s

  • Armature (Ta): 0.035 s

  • Open Circuit Field (T’do): 2.91 s

Construction & Design

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

• Protection: IP23 (optional IP44 with power reduction)

• Cooling System: Self-ventilated air cooling

  • 50 Hz: 2.18 m³/s

  • 60 Hz: 2.63 m³/s

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

• Winding: Double-layer stator winding with 2/3 pitch to eliminate 3rd, 9th, and 15th harmonics

• Rotor: Damped rotor dynamically balanced per 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 for star, delta, or parallel star configuration

• Inertia (WR²): 16.24–16.78 kg·m²

• Cooling Air Requirement: 2.18 m³/s @50Hz, 2.63 m³/s @60Hz

• Stator Resistance: 0.0039 Ω/phase at 22°C (star connection)

• Rotor Resistance: 1.6 Ω at 22°C

Dimensions & Weight

• Wound Rotor Weight: 760–865 kg

• Wound Stator Weight: 895–938 kg

• Complete Generator Weight: 1985–2045 kg

• Shipping Weight (Crated): 2023–2030 kg

• Packing Dimensions: 183 × 92 × 140 cm

Regulation & Control

• Excitation System: PMG excitation with brushless AVR

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

• 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: 2.18 m³/s (50Hz), 2.63 m³/s (60Hz)

• Noise & Vibration: Dynamically balanced per BS6861 standards

Performance Summary

• Efficiency Range: 93.0%–94.2% across rated loads

• 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, telecom, mobile power, refrigeration, rental, railway, and lighting tower systems