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 738-7824
Référence fabricantAT3 3,5-24/35-4
MarqueBlock
249,90 €
Each
Unité
240 V ac, 346 V 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 -
N° de stock RS 293-2656
Référence fabricantAIM 1.6/0.8
MarqueBlock
45,95 €
Each
Unité
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
N° de stock RS 347-6668
Référence fabricantCM2000/A/US
155,27 €
Each
Unité
230V ac 115V ac 2kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
N° de stock RS 158-7340
Référence fabricantEJET1000
MarqueBlock
398,09 €
Each
Unité
230V ac 110 V ac 1000VA Enclosed Floor Standing - Cable 244mm 244 x 143 x 197mm 143mm 197mm 50Hz 60Hz -
N° de stock RS 310-1156
Référence fabricantSAT200
MarqueBlock
66,34 €
Each
Unité
230V ac 115 V ac 200VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
N° de stock RS 504-206
MarqueRS PRO
183,70 €
Each
Unité
220 V ac, 230 V ac, 240 V ac 115V ac 1kVA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 115mm 115 x 192 x 137mm 192mm 137mm 50Hz 60Hz -
N° de stock RS 158-7312
Référence fabricantE-JET 250
MarqueBlock
228,24 €
Each
Unité
230V ac 110 V ac 250VA Enclosed - - Cable with Plug, 3-Pin USA Socket 160mm 160 x 95 x 155mm 95mm 155mm 50Hz 60Hz -
N° de stock RS 738-7795
Référence fabricantAT3 2-22/23-4
MarqueBlock
204,09 €
Each
Unité
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 -
N° de stock RS 293-2678
Référence fabricantAIM 5.0/2.5
MarqueBlock
78,19 €
Each
Unité
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
N° de stock RS 328-8067
Référence fabricantSAT 600
MarqueBlock
93,01 €
Each
Unité
230V ac 115 V ac 600VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
N° de stock RS 504-189
MarqueRS PRO
74,99 €
Each
Unité
220 V ac, 230 V ac, 240 V ac 115V ac 150VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 73mm 73 x 120 x 89mm 120mm 89mm 50Hz 60Hz -
N° de stock RS 310-1162
Référence fabricantSAT300
MarqueBlock
89,18 €
Each
Unité
230V ac 115 V ac 300VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
N° de stock RS 738-7884
Référence fabricantAT3 15-48/50-4
MarqueBlock
377,71 €
Each
Unité
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 -
N° de stock RS 310-1140
Référence fabricantSAT100
MarqueBlock
65,66 €
Each
Unité
230V ac 115 V ac 100VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
N° de stock RS 158-7328
Référence fabricantEJET500
MarqueBlock
293,66 €
Each
Unité
230V ac 110 V ac 500VA Enclosed - - Cable 180mm 180 x 126 x 192mm 126mm 192mm 50Hz 60Hz -
N° de stock RS 738-7846
Référence fabricantAT3 10-20/21-4
MarqueBlock
604,24 €
Each
Unité
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 -
N° de stock RS 738-7818
Référence fabricantAT3 2-69-4
MarqueBlock
195,21 €
Each
Unité
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 -
N° de stock RS 738-7871
Référence fabricantAT3 15-20/21-4
MarqueBlock
791,02 €
Each
Unité
200 V ac, 208 V ac 400 V ac 15kVA Open Frame Chassis Mount, Floor Standing, Wall Mount 3 UI 180/78 Screw 410mm 410 x 170 x 380mm 170mm 380mm 50Hz 60Hz -
N° de stock RS 738-7868
Référence fabricantAT3 10-58/60-4
MarqueBlock
410,05 €
Each
Unité
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 -
N° de stock RS 293-2662
Référence fabricantAIM 3.2/1.6
MarqueBlock
64,10 €
Each
Unité
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