Variacs

Variacs are also known as autotransformers and are a speciality type of the electrical transformer that consists only one winding. The winding acts as both primary and secondary sides of the transformer. The ordinary type of transformers have 2 coils instead and they are not electrically connected. The one winding resolution allows for producing a smaller, lighter and cheaper transformers than ordinary 2 winding ones. They also feature lower leakage reactance, lower losses lower excitation current and increased VA rating for a given size and mass. At the other side, the disadvantage is a lack any electrical insulation between circuits. It can result in full input voltage applied to the output.
Variacs/Autotransformers are commonly used for:
• Power transmission and distribution – Variacs ensure that voltage at the beginning of the power distribution line is equivalent to the voltage at the end of the line.
• Power conversions – Variacs are able to convert common domestic mains voltage bands that are in use across the world. For example 200 V to 250 V or 100 V to 130V.
• Audio systems – Autotransformers are used to adapt speakers to constant- voltage distribution and for matching impendence levels.

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Description Price Primary Voltage Rating Secondary Voltage Rating Power Rating Mounting Type Knob Rotation Number of Phases Number of Outputs Termination Type Weight Dimensions Primary Current Rating Depth Diameter Length
RS Stock No. 890-2822
BrandRS PRO
TWD3,996.00
Each
units
240V 0 → 240V 360VA Surface Mount Clockwise 1 1 Wire Termination 2.6kg 113 x 130 x 127mm 1.5A 127mm 113mm 113mm
RS Stock No. 890-2828
BrandRS PRO
TWD3,767.00
Each
units
240V 0 → 240V 240VA Surface Mount Clockwise 1 1 Wire Termination 1.6kg 86 x 99 x 110mm 1A 110mm 87mm 113mm
RS Stock No. 890-2765
BrandRS PRO
TWD3,105.00
Each
units
240V 0 → 240 V, 0 → 270 V 170VA Surface Mount Clockwise 1 1 Wire Termination 1.4kg 83 x 80mm 0.7A 96mm 83mm 80mm
RS Stock No. 890-2884
BrandRS PRO
TWD40,974.00
Each
units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 270 x 210 x 200mm 10A 200mm - 270mm
RS Stock No. 890-2888
BrandRS PRO
TWD75.00
Each
units
- - - Surface Mount - - - Wire Termination 5g 10.5 x 3mm - 3mm 10.5mm -
RS Stock No. 122-6780
Mfr. Part No.MVT14.7k/18A-3
TWD29,569.00
Each
units
415V - 14.7kVA - - 3 - Clamp - 190 x 220 x755mm - 755mm - 190mm
RS Stock No. 890-2812
BrandRS PRO
TWD18,263.00
Each
units
240V 0 → 240 V, 0 → 270 V 3.6kVA Surface Mount Clockwise 1 1 Wire Termination 14kg 225 x 225 x 190mm 15A 190mm - 225mm
RS Stock No. 122-6781
Mfr. Part No.MVT4.2k/5A-3E
TWD23,143.00
Each
units
415V - 4.2kVA Free Standing - 3 - Clamp - 245 x 250 x 595mm - 595mm - 245mm
RS Stock No. 890-2890
BrandRS PRO
TWD221.00
Each
units
- - - Surface Mount - - - Wire Termination 7g 9.5 x 2.5 x 14mm - 14mm - 9.5mm
RS Stock No. 890-2799
BrandRS PRO
TWD4,310.00
Each
units
240V 0 → 240 V, 0 → 270 V 170VA Surface Mount Clockwise 1 1 Wire Termination 1.9kg 160 x 130 x 160mm 0.7A 160mm - 160mm
RS Stock No. 890-2816
BrandRS PRO
TWD18,556.00
Each
units
240V 0 → 240 V, 0 → 270 V 4.8kVA Surface Mount Clockwise 1 1 Wire Termination 15.3kg 225 x 225 x 190mm 20A 190mm - 225mm
RS Stock No. 122-6783
Mfr. Part No.MVT14.7k/18A-3E
TWD39,339.00
Each
units
415V - 14.7kVA Free Standing - 3 - Clamp - 285 x 280 x 690mm - 690mm - 285mm
RS Stock No. 890-2834
BrandRS PRO
TWD6,126.00
Each
units
240V 0 → 240V 720VA Surface Mount Clockwise 1 1 Wire Termination 3.5kg 113 x 130 x 127mm 3A 127mm 116mm 113mm
RS Stock No. 890-2894
BrandRS PRO
TWD265.00
Each
units
- - - Surface Mount - - - Wire Termination 10g 12.5 x 3 x 16mm - 16mm - 12.5mm
RS Stock No. 117-6012
Mfr. Part No.MVT0.3/1.1A-1
TWD3,568.00
Each
units
240V - 300VA Panel Mount Clockwise 1 1 Clamp 5kg 103 (Dia.) x 172mm - - 103mm 172mm
RS Stock No. 890-2869
BrandRS PRO
TWD57,223.00
Each
units
415V 0 → 415 V, 0 → 470 V 16.3kVA Surface Mount Clockwise 3 3 Wire Termination 50.1kg 250 x 300 x 445mm 20A 445mm - 250mm
RS Stock No. 890-2774
BrandRS PRO
TWD4,357.00
Each
units
240V 0 → 240 V, 0 → 270 V 480VA Surface Mount Clockwise 1 1 Wire Termination 2.9kg 110 x 110 x 95mm 2A 95mm - 110mm
RS Stock No. 890-2875
BrandRS PRO
TWD22,211.00
Each
units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 280 x 200 x 200mm 10A 200mm - 280mm
RS Stock No. 890-2844
BrandRS PRO
TWD10,530.00
Each
units
415V 0 → 415 V, 0 → 470 V 1.628kVA Surface Mount Clockwise 3 3 Wire Termination 9.1kg 110 x 110 x 330mm 2A 330mm - 110mm
RS Stock No. 117-6016
Mfr. Part No.MVT2.5k/9A-1
TWD5,362.00
Each
units
240V - 2.5kVA Panel Mount Clockwise 1 1 Clamp 15kg 185 (Dia.) x 174mm - - 185mm 174mm