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. 890-2828
BrandRS PRO
TWD3,715.00
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. 890-2822
BrandRS PRO
TWD3,941.00
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. 890-2765
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. 117-6015
Mfr. Part No.MVT1.4k/5A-1
TWD4,469.00
Each
units
240V - 1.4kVA Panel Mount Clockwise 1 1 Clamp 11kg 170 (Dia.) x 176mm - - 170mm 176mm
RS Stock No. 117-6016
Mfr. Part No.MVT2.5k/9A-1
TWD5,289.00
Each
units
240V - 2.5kVA Panel Mount Clockwise 1 1 Clamp 15kg 185 (Dia.) x 174mm - - 185mm 174mm
RS Stock No. 122-6784
Mfr. Part No.MVTC-UK5A
TWD24,414.00
Each
units
240V - 1350VA Free Standing Clockwise 1 3 Wire Termination 16.5kg 230 x 200 x 365mm - - - 230mm
RS Stock No. 890-2866
BrandRS PRO
TWD15,339.00
Each
units
240V ac - 1.2kVA Stand Alone Clockwise 1 - Wire Termination 10kg 280 x 200 x 200mm 5A 200mm - 280mm
RS Stock No. 890-2793
BrandRS PRO
TWD5,071.00
Each
units
240V 0 → 240 V, 0 → 270 V 480VA Surface Mount Clockwise 1 1 Wire Termination 3.8kg 160 x 130 x 160mm 2A 160mm - 160mm
RS Stock No. 890-2806
BrandRS PRO
TWD9,836.00
Each
units
240V 0 → 240 V, 0 → 270 V 1.2kVA Surface Mount Clockwise 1 1 Wire Termination 8.8kg 175 x 175 x 140mm 5A 140mm - 175mm
RS Stock No. 890-2796
BrandRS PRO
TWD18,114.00
Each
units
240V 0 → 240 V, 0 → 270 V 4.8kVA Surface Mount Clockwise 1 1 Wire Termination 13.8kg 225 x 225 x 135mm 20A 135mm - 225mm
RS Stock No. 890-2812
BrandRS PRO
TWD18,011.00
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. 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. 117-6018
Mfr. Part No.MVT4.9k/18A-1
TWD9,366.00
Each
units
240V - 4.9kVA Panel Mount Clockwise 1 1 Clamp 23kg 205 (Dia.) x 203mm - - 205mm 203mm
RS Stock No. 122-6779
Mfr. Part No.MVT9.9k/12A-3
TWD21,926.00
Each
units
415V - 9.9kVA - - 3 - Clamp - 190 x 220 x 680mm - 680mm - 190mm
RS Stock No. 890-2872
BrandRS PRO
TWD26,938.00
Each
units
240V ac 0 → 240V ac 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 270 x 210 x 200mm 10A 200mm - 270mm
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. 890-2825
BrandRS PRO
TWD23,512.00
Each
units
240V 0 → 240 V, 0 → 270 V 6.72kVA Surface Mount Clockwise 1 1 Wire Termination 25kg 300 x 300 x 225mm 28A 225mm - 300mm
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. 117-6017
Mfr. Part No.MVT3.3k/12A-1
TWD7,312.00
Each
units
240V - 3.3kVA Panel Mount Clockwise 1 1 Clamp 18kg 205 (Dia.) x 178mm - - 205mm 178mm
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