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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Description Prix 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
N° de stock RS 347-6652
Référence fabricantCM1000/A/US
114,97 €
Each
Unité
230V ac 114.2V ac 1kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
N° de stock RS 738-7806
Référence fabricantAT3 2-48/50-4
MarqueBlock
147,10 €
Each
Unité
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 -
N° de stock RS 738-7859
Référence fabricantAT3 10-24/35-4
MarqueBlock
518,60 €
Each
Unité
240 V ac, 346 V ac 400 V ac 10kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 150/65 Screw 350mm 350 x 162 x 280mm 162mm 280mm 50Hz 60Hz -
N° de stock RS 738-7900
Référence fabricantAT3 25-22/23-4
MarqueBlock
1.217,77 €
Each
Unité
220 V ac, 230 V ac 400 V ac 25kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 210/88 Screw 480mm 480 x 220 x 440mm 220mm 440mm 50Hz 60Hz -
N° de stock RS 738-7896
Référence fabricantAT3 15-69-4
MarqueBlock
690,29 €
Each
Unité
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 -
N° de stock RS 738-7880
Référence fabricantAT3 15-44/46-4
MarqueBlock
296,15 €
Each
Unité
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 -
N° de stock RS 738-7890
Référence fabricantAT3 25-20/21-4
MarqueBlock
1.279,01 €
Each
Unité
200 V ac, 208 V ac 400 V ac 25kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 210/88 Screw 480mm 480 x 220 x 440mm 220mm 440mm 50Hz 60Hz -
N° de stock RS 436-9842
Référence fabricantAIM10/5
MarqueBlock
182,18 €
Each
Unité
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
N° de stock RS 738-7830
Référence fabricantAT3 3,5-48/50-4
MarqueBlock
187,42 €
Each
Unité
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 -
N° de stock RS 738-7874
Référence fabricantAT3 15-22/23-4
MarqueBlock
490,57 €
Each
Unité
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 -
N° de stock RS 738-7887
Référence fabricantAT3 15-38/42-4
MarqueBlock
123,13 €
Each
Unité
380 V ac, 415 V ac 400 V ac 15kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 90/51,1 Screw 220mm 220 x 125 x 175mm 125mm 175mm 50Hz 60Hz -
N° de stock RS 738-7802
Référence fabricantAT3 2-44/46-4
MarqueBlock
123,76 €
Each
Unité
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 -
N° de stock RS 436-9858
Référence fabricantAIM16/8
MarqueBlock
228,54 €
Each
Unité
115 V ac, 230 V ac 115 V ac, 220 V ac, 230 V ac, 240 V ac - Enclosed Panel Mount - Screw 284mm 283 x 200 x 165mm 165mm 200mm 50Hz 60Hz -20°C
N° de stock RS 738-7821
Référence fabricantAT3 3,5-22/23-4
MarqueBlock
285,51 €
Each
Unité
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 -
N° de stock RS 738-7799
Référence fabricantAT3 2-24/35-4
MarqueBlock
196,35 €
Each
Unité
240 V ac, 346 V 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 -