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 Price 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庫存編號 347-6668
製造零件編號CM2000/A/US
HK$1,339.60
單位
230V ac 115V ac 2kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
RS庫存編號 310-1156
製造零件編號SAT200
BrandBlock
HK$505.24
單位
230V ac 115 V ac 200VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
RS庫存編號 504-202
BrandRS PRO
HK$367.53
單位
230V ac 115V ac 50VA Enclosed Chassis Mount, Floor Standing, Wall Mount - - 58mm 58 x 63 x 70mm 63mm 70mm 50Hz 60Hz -
RS庫存編號 347-6652
製造零件編號CM1000/A/US
HK$1,272.96
單位
230V ac 114.2V ac 1kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
RS庫存編號 310-1140
製造零件編號SAT100
BrandBlock
HK$463.93
單位
230V ac 115 V ac 100VA - - - - 166mm 166 x 76 x 77mm 76mm 77mm - - -
RS庫存編號 436-8877
製造零件編號CMA30K/FM0
HK$6,635.95
單位
380 V, 400 V, 415 V 380 V, 400 V, 415 V 30kVA - - Bobbin - 420mm 420 x 350 x 260mm 350mm 260mm - - -
RS庫存編號 436-8883
製造零件編號CM3000/A/US
HK$1,793.85
單位
230V 114.1V ac 3kVA - - Bobbin - 205mm 205 x 195 x 260mm 260mm 190mm - - -
RS庫存編號 158-7328
製造零件編號EJET500
BrandBlock
HK$2,160.00
單位
230V ac 110 V ac 500VA Enclosed - - Cable 180mm 180 x 126 x 192mm 126mm 192mm 50Hz 60Hz -
RS庫存編號 504-195
BrandRS PRO
HK$815.06
單位
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庫存編號 328-8051
製造零件編號SAT 500
BrandBlock
HK$893.14
單位
230V ac 115 V ac 500VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
RS庫存編號 310-1162
製造零件編號SAT300
BrandBlock
HK$618.45
單位
230V ac 115 V ac 300VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
RS庫存編號 328-8067
製造零件編號SAT 600
BrandBlock
HK$1,050.37
單位
230V ac 115 V ac 600VA - - - - 223mm 223 x 97 x 117mm 97mm 117mm - - -
RS庫存編號 293-2662
製造零件編號AIM 3.2/1.6
BrandBlock
HK$748.61
單位
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庫存編號 293-2656
製造零件編號AIM 1.6/0.8
BrandBlock
HK$686.60
單位
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庫存編號 436-9858
製造零件編號AIM16/8
BrandBlock
HK$1,900.00
單位
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
RS庫存編號 504-189
BrandRS PRO
HK$506.63
單位
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庫存編號 504-199
BrandRS PRO
HK$585.95
單位
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庫存編號 504-206
BrandRS PRO
HK$1,263.54
單位
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庫存編號 436-8861
製造零件編號CMA10K/FM0
HK$4,615.51
單位
380 V, 400 V, 415 V 380 V, 400 V, 415 V 10kVA Enclosed Floor Standing - - 420mm 420 x 270 x 325mm 270mm 325mm 50Hz 60Hz -
RS庫存編號 436-9842
製造零件編號AIM10/5
BrandBlock
HK$2,146.24
單位
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