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

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Beskrivning Pris Primary Voltage Rating Secondary Voltage Rating Power Rating Construction Mounting Type Core Type Termination Type Length Dimensions Width Depth Minimum Operating Frequency Maximum Operating Frequency Minimum Temperature
RS-artikelnummer 310-1140
Tillv. art.nrSAT100
VarumärkeBlock
504,39 kr
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230V ac 115 V ac 100VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
RS-artikelnummer 436-8877
Tillv. art.nrCMA30K/FM0
VarumärkeCarroll & Meynell
7 056,71 kr
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380 V, 400 V, 415 V 380 V, 400 V, 415 V 30kVA - - Bobbin - 420mm 420 x 350 x 260mm 350mm 260mm - - -
RS-artikelnummer 293-2656
Tillv. art.nrAIM 1.6/0.8
VarumärkeBlock
499,81 kr
Each
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115 V ac, 230 V ac 115 V ac, 220 V ac, 230 V ac, 240 V ac - Enclosed Panel Mount - Screw 166mm 166 x 77 x 76mm 77mm 76mm 50Hz 60Hz -20°C
RS-artikelnummer 310-1156
Tillv. art.nrSAT200
VarumärkeBlock
721,60 kr
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230V ac 115 V ac 200VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
RS-artikelnummer 328-8051
Tillv. art.nrSAT 500
VarumärkeBlock
1 017,79 kr
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230V ac 115 V ac 500VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
RS-artikelnummer 436-8883
Tillv. art.nrCM3000/A/US
VarumärkeCarroll & Meynell
2 072,56 kr
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230V 114.1V ac 3kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
RS-artikelnummer 436-9842
Tillv. art.nrAIM10/5
VarumärkeBlock
1 981,62 kr
Each
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115 V ac, 230 V ac 115 V ac, 220 V ac, 230 V ac, 240 V ac - Enclosed Panel Mount - Screw 283mm 283 x 200 x 165mm 165mm 200mm 50Hz 60Hz -20°C
RS-artikelnummer 738-7874
Tillv. art.nrAT3 15-22/23-4
VarumärkeBlock
8 223,86 kr
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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 -
RS-artikelnummer 738-7878
Tillv. art.nrAT3 15-24/35-4
VarumärkeBlock
4 582,76 kr
Each
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240 V ac, 346 V ac 400 V ac 15kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 180/63 Screw 410mm 410 x 175 x 345mm 175mm 345mm 50Hz 60Hz -
RS-artikelnummer 738-7919
Tillv. art.nrAT3 25-48/50-4
VarumärkeBlock
6 906,40 kr
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480 V ac, 500 V ac 400 V ac 25kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 150/77 Screw 350mm 350 x 192 x 280mm 192mm 280mm 50Hz 60Hz -
RS-artikelnummer 738-7907
Tillv. art.nrAT3 25-38/42-4
VarumärkeBlock
2 865,21 kr
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380 V ac, 415 V ac 400 V ac 25kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 114/40 Screw 267mm 267 x 145 x 220mm 145mm 220mm 50Hz 60Hz -
RS-artikelnummer 293-2662
Tillv. art.nrAIM 3.2/1.6
VarumärkeBlock
697,23 kr
Each
Enheter
115 V ac, 230 V ac 115 V ac, 220 V ac, 230 V ac, 240 V ac - Enclosed Panel Mount - Screw 223mm 223 x 97 x 117mm 97mm 117mm 50Hz 60Hz -20°C
RS-artikelnummer 738-7837
Tillv. art.nrAT3 3,5-44/46-4
VarumärkeBlock
1 530,53 kr
Each
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3 x 440 V ac, 460 V ac 400V ac 3.5 kVA, 10 kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 75/41,5 Screw 155mm 155 x 110 x 155mm 110mm 155mm 50Hz 60Hz -
RS-artikelnummer 738-7896
Tillv. art.nrAT3 15-69-4
VarumärkeBlock
7 752,73 kr
Each
Enheter
220 V ac, 230 V 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 -
RS-artikelnummer 504-199
VarumärkeRS PRO
861,12 kr
Each
Enheter
220 V ac, 230 V ac, 240 V ac 115V ac 250VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 81mm 81 x 136 x 100mm 136mm 100mm 50Hz 60Hz -
RS-artikelnummer 738-7880
Tillv. art.nrAT3 15-44/46-4
VarumärkeBlock
3 336,55 kr
Each
Enheter
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 -
RS-artikelnummer 347-6652
Tillv. art.nrCM1000/A/US
VarumärkeCarroll & Meynell
1 188,79 kr
Each
Enheter
230V ac 114.2V ac 1kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
RS-artikelnummer 738-7795
Tillv. art.nrAT3 2-22/23-4
VarumärkeBlock
2 738,45 kr
Each
Enheter
220 V ac, 230 V ac 400 V ac 2kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 90/51,5 Screw 220mm 220 x 125 x 175mm 125mm 175mm 50Hz 60Hz -
RS-artikelnummer 328-8067
Tillv. art.nrSAT 600
VarumärkeBlock
1 011,70 kr
Each
Enheter
230V ac 115 V ac 600VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
RS-artikelnummer 504-202
VarumärkeRS PRO
548,32 kr
Each
Enheter
230V ac 115V ac 50VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 58mm 58 x 63 x 70mm 63mm 70mm 50Hz 60Hz -