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    Ratings of Generators

    Generators are rated in either kVA (kilovolt amperes) of kW (kilowatts), Kilo meaning 1000. The kVA is always higher than the kW. This is because kVA is divided by the power factor to give the kW. Most generators are rated with a power factor of 0.8.

    Power and Power Factor

    It is common to use mechanical kW to indicate the engine power but for alternators there are two ways to indicate the power:

    kW (active power) and kVA (apparent power) the ratio of these two is the Power Factor.

    kW = kVA x P.F

    What does Power Factor mean?

    In a DC circuit the power in Watts is a product of Voltage x Current.

    In an AC circuit the Active Power is not always the product Voltage x Current. It is related to the Power factor, which depends on the type of load:

    RESISTIVE LOAD (Incandescent lights, heaters)

    The voltage and current peaks coincide to enable that the in-phase and the power factor are in unity.

    INDUCTIVE LOAD (Motors, transformers)

    On an inductive load the current waveform is LAGGING behind the voltage waveform, the voltage peaks and current peaks are not in phase, the amount of phase delay is given by the cosine of the angle (Cos) between the vectors representing voltage and current.

    Hire Fleet Cable / Generator Size.

    Hire Fleet Cable / Generator Size. Three Phase
    15 kVa 10mm 3 core 6mm 5 core
    30 kVa 16mm 3 core 10mm 5 core
    40 kVa 35mm 3 core 16mm 5 core
    60 kVa 35mm 5 core
    80 kVa 35mm 5 core
    100 kVa 35mm 5 core
    150 kVa 120mm 5 single cores
    200 kVa 120mm 5 single cores
    250 kVa 120mm 5 single cores
    350 kVa 240 mm 5 single cores
    500 kVa 240 mm 5 single cores
    800 kVa 240 mm 10 single cores 2 per phase 2N 2E
    1250 kVa 240 mm 10 single cores 3 per phase 2N 2E
    Size MM Length Metre Current Rating Three Phase AC Cable Dimensions Diameter Cable Dimensions Weight Kg Lug Hole mm Dimensions Length Dimensions Width Dimensions Height Dimensions Weight
    6 5 Core 25 47 24.5 16.5 10 316 316 333 27.50
    10 5 Core 25 64 30.5 27.15 10
    12
    9000 458 1190 133.15
    10 5 Core 50 64 30.5 54.30 10
    12
    900 458 1190 160.30
    35 5 Core 25 135 47.5 80.0 10
    12
    900 458 1190 186.0
    35 5 Core 50 135 47.5 160.00 10
    12
    900 458 1190 266.00
    95 4 Core 25 262 60.5 143.75 12
    12
    900 458 1190 249.70
    95 4 Core 50 262 60.5 287.40 12
    12
    900 805 1190 413.40
    95 Single Core 25 320 19.7 25.9 12
    12
    900 458 1190 235.00
    95 Single Core 50 320 19.7 51.4 12
    12
    900 805 1190 383.00
    120 SIngle Core 25 414 20.1 31.75 12
    12
    900 458 1190 264.00
    120 SIngle Core 50 414 20.1 63.5 12
    16
    900 805 1190 443.00
    240 Single Core 25 645 28.3 60 12
    16
    900 805 1190 486.00
    240 Single Core 50 645 28.3 120 12
    16
    900 805 1190 606.00
    240 Single Core 100 645 28.3 240 12
    16
    900 805 1190 606.00