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DP-Genera, 428B04, Alternator, 825 kVA, 50/60Hz, 3 Phase (New)

Description

  1. Overview
    1. Three-phase synchronous generator
    2. Dp-genera model: 428b04
    3. Datasheet for 4 poles, 50Hz @ 1500rpm / 60Hz @ 1800rpm
    4. Rated continuous 825 kVA at 50Hz, 400V, 3 phase, 1500 rpm, 0.8 pf lagging, based on class H and 40°C ambient temperature
    5. Comes with droop CT, space heater and digital AVR which provides diode failure detection, excitation loss
    6. Detailed ratings and specifications can be found in the attached technical datasheet
  2. Electrical Characteristics
    1. Frequency: 50 Hz
    2. Round per minute: 1500 rpm
    3. Voltage (Y connection) star: 400 V
    4. Voltage (Δ connection) delta: 230 V
    5. Rated power at class H (125K) temperature rise: 825 kVA - 60 kW
    6. Efficiency at class H (p.f.=0.8): 100% 95.1, 75% 95.2, 50% 94.3
    7. Efficiency at class H (p.f.=1.0): 100% 95.8, 75% 95.8, 50% 95
    8. Voltage regulation accuracy +/- 0.5%
    9. AVR model ETC-1000
    10. Excitation: brushless
    11. Power factor: 0.8
    12. Short circuit current capacity (with aux or PMG ≥300%)
    13. Total harmonic content < 1.5% at no load
    14. Radio interference class B group 1
    15. Waveform: TTF
    16. Waveform: THF: <2%
  3. Reactance and Time Constants
    1. Short-circuit ratio: 0.38 KCC
    2. Direct axis synchronous reactance unsaturated: 2.5758 XD
    3. Quadrature axis synchronous reactance unsaturated: 1.5596 XQ
    4. Direct axis transient reactance saturated: 0.1727 X'D
    5. Direct axis subtransient reactance saturated: 0.1284 X"D
    6. Quadrature axis subtransient reactance saturated: 0.1474 X”Q
    7. Zero sequence reactance unsaturated: 0.0235 X0
    8. Leakage reactance: 0.0886 XL
    9. Negative sequence reactance saturated: 0.1374 X2
    10. Open circuit time constant (sec.): 2.473 T’DO
    11. Short-circuit transient time constant (sec.): 0.1220 T'D
    12. Subtransient time constant (sec.): 0.0090 T”D
    13. Armature time constant (sec.): 0.0304 TA
    14. Voltage recovery time sec.: 1.0
  4. Winding and Excitation Data
    1. Stator winding: double layer concentric
    2. Number of terminal: 6
    3. Winding pitch: 2 / 3
    4. Rotor: with damping cage
    5. No load excitation current: 0.7 IO(A)
    6. Full load excitation current: 1.9 IC(A)
    7. Full load excitation voltage: 44 UC(V)
    8. Stator winding resistance (20°C): 0.002814 ohm
    9. Rotor winding resistance (20°C): 1.462 ohm
    10. Exciter stator resistance (20°C): 19.96 ohm
    11. Exciter rotor phase resistance: 0.04177 ohm
  5. Mechanical and Environmental Specifications
    1. Ambient temperature: 40°C
    2. Temperature rise: 125K
    3. Service duty: continuous
    4. Insulation class: class H
    5. Method of cooling: IC01
    6. Direction of rotation (viewing from drive end): CW
    7. Maximum over-speed: 1800 rpm
    8. Degree of protection: IP23
    9. Altitude: ≤1000 m.a.s.l
    10. Cooling air requirement: 1.51 m3/sec
    11. Configuration: single bearing
    12. Type of construction: B2 - SAE
    13. Inertia (J) [kgm2]: 19.8
    14. Total weight: 1899
    15. Drive end bearing / lubrication: not supply
    16. Non-drive end bearing / lubrication: 6321 C3-2Z / prelubricated - sealed for life
    17. Overload: 110% rated load for 1 hour