Генератор A.R.K5F

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 configurations)

• 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 95.4%

• 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

• Reactances (Per Unit at Rated kVA):

  • Xd (Synchronous): 2.43–3.33

  • X’d (Transient): 0.11–0.16

  • X’’d (Subtransient): 0.08–0.11

  • Xq (Quadrature): 2.03–2.66

  • X’’q (Quadrature Subtransient): 0.21–0.31

  • X₂ (Negative Sequence): 0.15–0.21

  • X₀ (Zero Sequence): 0.07–0.09

• Time Constants:

  • Transient (T’d): 0.08 s

  • Subtransient (T’’d): 0.012 s

  • Armature (Ta): 0.019 s

  • Open Circuit Field (T’do): 2.5 s

• Waveform Distortion: <1.5% (no load), <5% (linear load)

Construction & Design

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

• Protection: IP23 (optional IP44 with reduced output)

• Cooling: Self-ventilated air cooling (1.035 m³/s @50Hz, 1.312 m³/s @60Hz)

• Frame: Rigid steel frame 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: 6220 (sealed-for-life ball bearing)

  • Non-Drive End: 6220 (sealed-for-life ball bearing)

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

• Leads: 12 reconnectable leads for flexible voltage configurations

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

• Mechanical Balance: Half-key dynamic balance in double bearing configuration

• Cooling Air Requirement: 1.035 m³/s (50Hz), 1.312 m³/s (60Hz)

• Winding Resistances:

  • Stator: 0.0037 Ω/phase (22°C, star connection)

  • Rotor: 2.16 Ω (22°C)

Dimensions & Weight

• Rotor Weight: 684 kg (single bearing) / 655 kg (double bearing)

• Stator Weight: 805 kg

• Complete Alternator Weight: 1685 kg (single bearing) / 1694 kg (double bearing)

• Inertia (WR²): 10.033 kg·m² (single bearing) / 7.7289 kg·m² (double bearing)

• Shipping Weight: 1775–1780 kg

• Packing Dimensions: 166 × 87 × 124 cm

Regulation & Control

• Excitation System: PMG excitation with brushless AVR

• 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: Integrated (low interference with radio transmissions)

• 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

• Noise & Vibration: Balanced per BS6861 standards

Performance Summary

• Efficiency Range: 94.6–95.4%

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

• Recovery Time: <0.5 seconds

• Locked Rotor Motor Starting: >300% of rated current

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