Генератор ARK5D

Electrical Performance

• Type: Three-phase, brushless, self-excited synchronous alternator with PMG excitation

• Frequency: 50 / 60 Hz

• Rated Power Factor: 0.8

• Rated 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% of rated current for 10 seconds

• Efficiency: Up to 94.9% at full load

• Overload Capacity: 110% for one hour in six-hour cycles

• 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): 2.72–3.52

  • X’d (Transient): 0.12–0.17

  • X’’d (Subtransient): 0.08–0.12

  • Xq (Quadrature): 1.85–2.87

  • X’’q (Quadrature Subtransient): 0.20–0.31

  • X₂ (Negative Sequence): 0.14–0.22

  • X₀ (Zero Sequence): 0.07–0.10

• Time Constants:

  • Transient (T’d): 0.08 s

  • Subtransient (T’’d): 0.012 s

  • Armature (Ta): 0.018 s

  • Open Circuit Field (T’do): 2.2 s

• Efficiency at Load (Power Factor 0.8):

  • 50Hz: 94.8–95.1%

  • 60Hz: 94.5–94.9%

Construction & Design

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

• Protection: IP23 (optional IP44 available with reduced output)

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

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

• Stator: Double-layer winding, 2/3 pitch to eliminate triple 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)

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

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

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

• Vibration: Controlled within BS6861 limits

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

Dimensions & Weight

• Weight (Wound Rotor): 563 kg (single bearing) / 535 kg (double bearing)

• Weight (Complete Alternator): 1393–1395 kg

• Weight (Wound Stator): 657 kg

• WR² Inertia: 8.0068 kg·m² (single bearing) / 7.7289 kg·m² (double bearing)

• Shipping Weight: 1485 kg

• Packing Dimensions: 166 × 87 × 124 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)

• Anti-Condensation Heater: Optional

• Protection Features: Stator winding and bearing overheat protection

• RFI Suppression: Integrated, compliant with industrial EMC standards

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

• Noise & Vibration: Low, per BS6861 standard

Performance Summary

• Efficiency Range: 94.5%–95.1% (depending on frequency and load)

• Voltage Dip under 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 systems