Alternator A.R.K164A

A.R.K164A Alternator – Compact, Brushless, and High-Efficiency Industrial Alternator

The A.R.K164A alternator, engineered by Arken Power Solutions, is a compact, high-performance three-phase brushless synchronous alternator designed for reliable power generation in small and medium generator sets. With self-excitation and AVR-controlled voltage regulation, it ensures precise output stability within ±1%, THD below 5%, and efficiency up to 78%. Built with Class H insulation, IP23 protection, and sealed-for-life bearings, this alternator offers exceptional durability, thermal resistance, and minimal maintenance requirements. Fully compliant with IEC60034, NEMA MG1-22, and ISO9001 standards, the A.R.K164A is ideal for prime power, rental, telecom, mobile, railway, and standby applications.

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Alternator Model

A.R.K164A

50Hz (kVA)

8.1

60Hz (kVA)

10.2
Control System SELF EXCITED
A.V.R. OPTIONAL SX440
Voltage Regulation ± 1.0 %
Sustained Short Circuit >300% OF RATED CURRENT
Rated Power Factor0.8

Electrical Performance

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

  • Frequency: 50 / 60 Hz

  • Power Factor: 0.8

  • Voltage Range: 190–480 V (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% rated current

  • Efficiency: 73.8–78.0% (depending on load and frequency)

  • Telephone Harmonic Factor (THF): <2%

  • Telephone Interference Factor (TIF): <50

  • Power Ratings (Winding 311):

    • 50 Hz: 6.0–9.6 kVA

    • 60 Hz: 6.8–10.4 kVA

  • Voltage Combinations:

    • 50 Hz: 380/220, 400/231, 415/240, 440/254

    • 60 Hz: 416/240, 440/254, 460/266, 480/277

  • Short Circuit Ratio (1/Xd): 6.2–8.9 typical

Reactances (Per Unit at Rated kVA)

  • Xd (Synchronous): 1.89–2.06

  • X’d (Transient): 0.17–0.24

  • X’’d (Subtransient): 0.12–0.15

  • Xq (Quadrature): 0.83–1.18

  • X’’q (Quadrature Subtransient): 0.19–0.27

  • X₂ (Negative Sequence): 0.16–0.23

  • X₀ (Zero Sequence): 0.06–0.10

  • Leakage Reactance (XL): 0.07–0.09

  • Time Constants:

    • Transient (T’d): 0.25 s

    • Subtransient (T’’d): 0.012 s

    • Armature (Ta): 0.0045 s

    • Open Circuit Field (T’do): 0.0035 s

Construction & Design

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

  • Protection: IP23

  • Cooling: Self-ventilated air cooling

    • 50 Hz: 0.071 m³/s (150 cfm)

    • 60 Hz: 0.09 m³/s (191 cfm)

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

  • Stator: Double-layer winding, 2/3 pitch to eliminate triple harmonics (3rd, 9th, 15th, etc.)

  • Rotor: Damped rotor with dynamic balance (BS6861 standard)

  • Bearings:

    • Drive End: 6309-2RS (ISO)

    • Non-Drive End: 6306-2RS (ISO)

    • Type: Sealed-for-life, non-maintenance ball bearings

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

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

  • Winding Resistance:

    • Stator: 1.62 Ω/phase (22°C, star connection)

    • Rotor: 0.44 Ω (22°C)

  • Rotor Inertia (WR²): 0.0923 kg·m²

Dimensions & Weight

  • Rotor Weight: 22.5 kg

  • Stator Weight: 25.6 kg

  • Complete Alternator Weight: 88–101 kg (depending on bearing configuration)

  • Shipping Weight (Crated): 91–101 kg

  • Packing Dimensions: 64 × 54 × 72 cm

Regulation & Control

  • Excitation System: Self-excited

  • AVR Models: SX460 (standard), SX440 (optional), AS440 / MX341 / MX321 (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: 0.071–0.09 m³/s depending on frequency

  • Noise & Vibration: Meets BS6861 mechanical balance standards

Performance Summary

  • Efficiency Range: 73.8–78.0%

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

Datasheet

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