Auto Transformers, Step Down Transformers | RS
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    Autotransformers

    An autotransformer, also known as a step-down transformer, is an electrical transformer with only one winding. The winding has at least 3 taps where electrical connections are made. Autotransformers have the benefit of being small, light and cheap compared to dual-winding transformers.

    Autotransformers are used to step up or step down voltages in the 110V-115V-120V range and 220V-230V-240V range. This allows electrical equipment from the US to be fed from higher European voltage.

    Applications

    • Can be used as a method of soft starting induction motors

    • In UK railway applications

    • In audio applications, tapped autotransformers are used to adapt speakers to constant-voltage distribution systems

    • Power applications to interconnect systems operating at different voltages

    • Special autotransformers are used on rural power distribution lines so that customers further away receive the same average voltage as ones nearer to the source

    46 Producten voor Autotransformers

    Carroll & Meynell
    380 V, 400 V, 415 V
    380 V, 400 V, 415 V
    10kVA
    Enclosed
    Floor Standing
    -
    -
    420mm
    420 x 270 x 325mm
    270mm
    325mm
    50Hz
    60Hz
    -
    -
    Block
    230V ac
    110 V ac
    1000VA
    Enclosed
    Floor Standing
    -
    Cable
    244mm
    244 x 143 x 197mm
    143mm
    197mm
    50Hz
    60Hz
    -
    +40°C
    Block
    115 V ac, 230 V ac
    115 V ac, 220 V ac, 230 V ac
    -
    Enclosed
    Panel Mount
    -
    Screw
    223mm
    223 x 97 x 117mm
    97mm
    117mm
    50Hz
    60Hz
    -20°C
    +40°C
    Block
    440 V ac, 460 V ac
    400 V ac
    2kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 75/26,5
    Screw
    155mm
    155 x 95 x 155mm
    95mm
    155mm
    50Hz
    60Hz
    -
    +40°C
    Block
    380 V ac, 415 V ac
    400 V ac
    10kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 90/31,5
    Screw
    220mm
    220 x 105 x 175mm
    105mm
    175mm
    50Hz
    60Hz
    -
    +40°C
    Block
    480 V ac, 500 V ac
    400 V ac
    2kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 75/41,5
    Screw
    155mm
    155 x 110 x 155mm
    110mm
    155mm
    50Hz
    60Hz
    -
    +40°C
    Block
    690V ac
    400 V ac
    3.5kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 114/40
    Screw
    267mm
    267 x 125 x 215mm
    125mm
    215mm
    50Hz
    60Hz
    -
    +40°C
    Block
    440 V ac, 460 V ac
    400 V ac
    15kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 114/64
    Screw
    267mm
    267 x 150 x 215mm
    150mm
    215mm
    50Hz
    60Hz
    -
    +40°C
    Block
    440 V ac, 460 V ac
    400 V ac
    10kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 114/40
    Screw
    267mm
    267 x 125 x 215mm
    125mm
    215mm
    50Hz
    60Hz
    -
    +40°C
    Block
    200 V ac, 208 V ac
    400 V ac
    3.5kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 114/64
    Screw
    267mm
    267 x 150 x 220mm
    150mm
    220mm
    50Hz
    60Hz
    -
    +40°C
    Block
    480 V ac, 500 V ac
    400 V ac
    3.5kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 90/41,5
    Screw
    220mm
    220 x 115 x 175mm
    115mm
    175mm
    50Hz
    60Hz
    -
    +40°C
    Block
    220 V ac, 230 V ac
    400 V ac
    3.5kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 114/64
    Screw
    267mm
    267 x 150 x 220mm
    150mm
    220mm
    50Hz
    60Hz
    -
    +40°C
    Block
    690V ac
    400 V ac
    2kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 90/41,5
    Screw
    220mm
    220 x 115 x 175mm
    115mm
    175mm
    50Hz
    60Hz
    -
    +40°C
    Carroll & Meynell
    230V ac
    114.2V ac
    1kVA
    -
    -
    Bobbin
    -
    205mm
    205 x 195 x 260mm
    260mm
    190mm
    -
    -
    -
    -
    Block
    440 V ac, 460 V ac
    400 V ac
    25kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 132/72
    Screw
    315mm
    315 x 185 x 255mm
    185mm
    255mm
    50Hz
    60Hz
    -
    +40°C
    Block
    480 V ac, 500 V ac
    400 V ac
    15kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 132/72
    Screw
    315mm
    315 x 165 x 250mm
    165mm
    250mm
    50Hz
    60Hz
    -
    +40°C
    Block
    690V ac
    400 V ac
    15kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 180/63
    Screw
    410mm
    410 x 155 x 340mm
    155mm
    340mm
    50Hz
    60Hz
    -
    +40°C
    Block
    200 V ac, 208 V ac
    400 V ac
    10kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 150/77
    Screw
    350mm
    350 x 192 x 280mm
    192mm
    280mm
    50Hz
    60Hz
    -
    +40°C
    Block
    575 V ac, 600 V ac
    400 V ac
    10kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 132/72
    Screw
    315mm
    315 x 165 x 250mm
    165mm
    250mm
    50Hz
    60Hz
    -
    +40°C
    Block
    220 V ac, 230 V ac
    400 V ac
    15kVA
    Open Frame
    Chassis Mount, Floor Standing, Wall Mount
    3 UI 180/78
    Screw
    410mm
    410 x 195 x 345mm
    195mm
    345mm
    50Hz
    60Hz
    -
    +40°C
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