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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

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Omschrijving Prijs 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
Block 3.5kVA Open Frame Autotransformer, 240 V ac, 346 V ac Primary, 400 V ac Secondary, 3 UI 114/40 Core
RS-stocknr. 738-7824
FabrikantnummerAT3 3,5-24/35-4
FabrikantBlock
249,90 €
Each
Aantal stuks
 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 -
Block Enclosed Autotransformer, 115 V ac, 230 V ac Primary, 115 V ac, 220 V ac, 230 V ac, 240 V ac Secondary
RS-stocknr. 293-2656
FabrikantnummerAIM 1.6/0.8
FabrikantBlock
46,87 €
Each
Aantal stuks
 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
Block 1000VA Enclosed Autotransformer, 230V ac Primary, 110 V ac Secondary
RS-stocknr. 158-7340
FabrikantnummerEJET1000
FabrikantBlock
402,07 €
Each
Aantal stuks
 230V ac 110 V ac 1000VA Enclosed Floor Standing - Cable 244mm 244 x 143 x 197mm 143mm 197mm 50Hz 60Hz -
Block 200VA Autotransformer, 230V ac Primary, 115 V ac Secondary
RS-stocknr. 310-1156
FabrikantnummerSAT200
FabrikantBlock
67,67 €
Each
Aantal stuks
 230V ac 115 V ac 200VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
Carroll & Meynell 2kVA Autotransformer, 230V ac Primary, 115V ac Secondary, Bobbin Core
RS-stocknr. 347-6668
FabrikantnummerCM2000/A/US
FabrikantCarroll & Meynell
153,66 €
Each
Aantal stuks
 230V ac 115V ac 2kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
Block 250VA Enclosed Autotransformer, 230V ac Primary, 110 V ac Secondary
RS-stocknr. 158-7312
FabrikantnummerE-JET 250
FabrikantBlock
228,24 €
Each
Aantal stuks
 230V ac 110 V ac 250VA Enclosed - - Cable with Plug, 3-Pin USA Socket 160mm 160 x 95 x 155mm 95mm 155mm 50Hz 60Hz -
Block 2kVA Open Frame Autotransformer, 220 V ac, 230 V ac Primary, 400 V ac Secondary, 3 UI 90/51,5 Core
RS-stocknr. 738-7795
FabrikantnummerAT3 2-22/23-4
FabrikantBlock
204,09 €
Each
Aantal stuks
 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 -
Block Enclosed Autotransformer, 115 V ac, 230 V ac Primary, 115 V ac, 220 V ac, 230 V ac Secondary
RS-stocknr. 293-2678
FabrikantnummerAIM 5.0/2.5
FabrikantBlock
79,75 €
Each
Aantal stuks
 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
RS PRO 1kVA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-206
FabrikantRS PRO
173,03 €
Each
Aantal stuks
 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 -
Block 500VA Enclosed Autotransformer, 230V ac Primary, 110 V ac Secondary
RS-stocknr. 158-7328
FabrikantnummerEJET500
FabrikantBlock
293,66 €
Each
Aantal stuks
 230V ac 110 V ac 500VA Enclosed - - Cable 180mm 180 x 126 x 192mm 126mm 192mm 50Hz 60Hz -
Block 300VA Autotransformer, 230V ac Primary, 115 V ac Secondary
RS-stocknr. 310-1162
FabrikantnummerSAT300
FabrikantBlock
89,18 €
Each
Aantal stuks
 230V ac 115 V ac 300VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
Carroll & Meynell 3kVA Autotransformer, 230V Primary, 114.1V ac Secondary, Bobbin Core
RS-stocknr. 436-8883
FabrikantnummerCM3000/A/US
FabrikantCarroll & Meynell
194,35 €
Each
Aantal stuks
 230V 114.1V ac 3kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
Block Enclosed Autotransformer, 115 V ac, 230 V ac Primary, 115 V ac, 220 V ac, 230 V ac, 240 V ac Secondary
RS-stocknr. 293-2662
FabrikantnummerAIM 3.2/1.6
FabrikantBlock
65,38 €
Each
Aantal stuks
 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
Block 10kVA Open Frame Autotransformer, 575 V ac, 600 V ac Primary, 400 V ac Secondary, 3 UI 132/72 Core
RS-stocknr. 738-7868
FabrikantnummerAT3 10-58/60-4
FabrikantBlock
410,05 €
Each
Aantal stuks
 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 -
Block 15kVA Open Frame Autotransformer, 200 V ac, 208 V ac Primary, 400 V ac Secondary, 3 UI 180/78 Core
RS-stocknr. 738-7871
FabrikantnummerAT3 15-20/21-4
FabrikantBlock
791,02 €
Each
Aantal stuks
 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 -
Block 100VA Autotransformer, 230V ac Primary, 115 V ac Secondary
RS-stocknr. 310-1140
FabrikantnummerSAT100
FabrikantBlock
65,66 €
Each
Aantal stuks
 230V ac 115 V ac 100VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
Block 15kVA Open Frame Autotransformer, 480 V ac, 500 V ac Primary, 400 V ac Secondary, 3 UI 132/72 Core
RS-stocknr. 738-7884
FabrikantnummerAT3 15-48/50-4
FabrikantBlock
377,71 €
Each
Aantal stuks
 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 -
RS PRO 150VA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-189
FabrikantRS PRO
67,24 €
Each
Aantal stuks
 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 -
Block 2kVA Open Frame Autotransformer, 690V ac Primary, 400 V ac Secondary, 3 UI 90/41,5 Core
RS-stocknr. 738-7818
FabrikantnummerAT3 2-69-4
FabrikantBlock
195,21 €
Each
Aantal stuks
 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 -
Block 10kVA Open Frame Autotransformer, 200 V ac, 208 V ac Primary, 400 V ac Secondary, 3 UI 150/77 Core
RS-stocknr. 738-7846
FabrikantnummerAT3 10-20/21-4
FabrikantBlock
604,24 €
Each
Aantal stuks
 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 -
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