Генератор A.R.K5FS

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 (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: Up to 95.3%

• 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

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

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

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

• Leakage Reactance (XL): 0.05–0.06

• Transient Time Constant (T’d): 0.08 s

• Subtransient Time Constant (T’’d): 0.012 s

• Armature Time Constant (Ta): 0.019 s

• Open Circuit Field Time Constant (T’do): 2.5 s

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: Steel frame with cast aluminum front and rear covers

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

• Rotor: Damped rotor dynamically balanced per 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 versatile connections

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

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

• Stator Winding Resistance: 0.0043 Ω/phase (at 22°C, star connection)

• Rotor Winding Resistance: 1.96 Ω (at 22°C)

Dimensions & Weight

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

• Stator Weight: 722 kg

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

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

• Noise & Vibration: Dynamically balanced per BS6861 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, rental, telecom, mobile power, refrigeration, lighting tower, and railway generator systems