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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
RS PRO 1kVA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-206
FabrikantRS PRO
169,64 €
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 -
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 -
RS PRO 100VA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-183
FabrikantRS PRO
70,36 €
Each
Aantal stuks
 220 V ac, 230 V ac, 240 V ac 115V ac 100VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 65mm 65 x 115 x 78mm 115mm 78mm 50Hz 60Hz -
RS PRO 250VA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-199
FabrikantRS PRO
79,16 €
Each
Aantal stuks
 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 PRO 500VA Enclosed Autotransformer, 220 V ac, 230 V ac, 240 V ac Primary, 115V ac Secondary
RS-stocknr. 504-195
FabrikantRS PRO
110,33 €
Each
Aantal stuks
 220 V ac, 230 V ac, 240 V ac 115V ac 500VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 98mm 98 x 145 x 118mm 145mm 118mm 50Hz 60Hz -
RS PRO 50VA Enclosed Autotransformer, 230V ac Primary, 115V ac Secondary
RS-stocknr. 504-202
FabrikantRS PRO
50,41 €
Each
Aantal stuks
 230V ac 115V ac 50VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 58mm 58 x 63 x 70mm 63mm 70mm 50Hz 60Hz -
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
45,95 €
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
398,09 €
Each
Aantal stuks
 230V ac 110 V ac 1000VA Enclosed Floor Standing - Cable 244mm 244 x 143 x 197mm 143mm 197mm 50Hz 60Hz -
Carroll & Meynell 2kVA Autotransformer, 230V ac Primary, 115V ac Secondary, Bobbin Core
RS-stocknr. 347-6668
FabrikantnummerCM2000/A/US
FabrikantCarroll & Meynell
155,27 €
Each
Aantal stuks
 230V ac 115V ac 2kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
Block 200VA Autotransformer, 230V ac Primary, 115 V ac Secondary
RS-stocknr. 310-1156
FabrikantnummerSAT200
FabrikantBlock
66,34 €
Each
Aantal stuks
 230V ac 115 V ac 200VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
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
78,19 €
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
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 - - 3-Pin USA Socket, Cable with Plug 160mm 160 x 95 x 155mm 95mm 155mm 50Hz 60Hz -
Carroll & Meynell 3kVA Autotransformer, 230V Primary, 114.1V ac Secondary, Bobbin Core
RS-stocknr. 436-8883
FabrikantnummerCM3000/A/US
FabrikantCarroll & Meynell
190,54 €
Each
Aantal stuks
 230V 114.1V ac 3kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
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 -
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 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
64,10 €
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 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 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 -
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