Генератор A.R.K5E

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 configurations)

• Voltage Regulation: ±1.0%

• Total Harmonic Distortion (THD): <5.0% (balanced load), <1.5% (no load)

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

• Efficiency: Up to 95.3% at full load

• 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): 2.83–3.53

  • X’d (Transient): 0.12–0.17

  • X’’d (Subtransient): 0.09–0.12

  • Xq (Quadrature): 2.21–2.82

  • X’’q (Quadrature Subtransient): 0.24–0.34

  • X₂ (Negative Sequence): 0.16–0.23

  • X₀ (Zero Sequence): 0.06–0.10

• 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% (balanced linear load)

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

Construction & Design

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

• Protection: IP23 (optional IP44 with derating)

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

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

• Winding: Double-layer stator winding, 2/3 pitch design eliminates triple harmonics

• Rotor: Damped rotor with dynamic balancing to BS6861 standards

• Bearings:

  • Drive End: 6220-2RS (sealed-for-life ball bearing)

  • Non-Drive End: 6314-2RS (sealed-for-life ball bearing)

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

• Leads: 12 reconnectable leads for flexible configuration (star/delta/parallel star)

• Inertia (WR²): 8.98 kg·m² (single bearing) / 8.70 kg·m² (double bearing)

• Weight:

  • Rotor: 617 kg (single bearing) / 588 kg (double bearing)

  • Stator: 722 kg

  • Complete Alternator: 1543 kg (single bearing) / 1535 kg (double bearing)

  • Shipping Weight: 1635 kg (50Hz) / 1625 kg (60Hz)

• Packing Dimensions: 166 × 87 × 124 cm

Regulation & Control

• Excitation System: PMG excitation with brushless AVR control

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

• Voltage Regulation Accuracy: ±1.0%

• Parallel Operation: Supported with compatible AVR

• Protection Features:

  • Stator winding and bearing overheat protection

  • Anti-condensation heater (optional)

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

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

• Noise & Vibration: Balanced per BS6861 mechanical standards

Performance Summary

• Efficiency Range: 94.5–95.3%

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