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. 890-2765
BrandRS PRO
TWD3,110.00
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. 890-2828
BrandRS PRO
TWD3,774.00
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
TWD4,003.00
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. 890-2838
BrandRS PRO
TWD7,921.00
Each
units
240V 0 → 240V 960VA Surface Mount Clockwise 1 1 Wire Termination 5.6kg 165 x 165 x 120mm 4A 120mm 165mm 165mm
RS Stock No. 122-6779
Mfr. Part No.MVT9.9k/12A-3
TWD21,864.00
Each
units
415V - 9.9kVA - - 3 - Clamp - 190 x 220 x 680mm - 680mm - 190mm
RS Stock No. 890-2878
BrandRS PRO
TWD20,542.00
Each
units
240V ac 0 → 240V ac 1.2kVA Stand Alone Clockwise 1 - Wire Termination 10kg 270 x 210 x 200mm 5A 200mm - 270mm
RS Stock No. 890-2840
BrandRS PRO
TWD9,331.00
Each
units
240V 0 → 240V 1.92kVA Surface Mount Clockwise 1 1 Wire Termination 7.8kg 165 x 165 x 140mm 8A 140mm 165mm 165mm
RS Stock No. 890-2856
BrandRS PRO
TWD14,793.00
Each
units
415V 0 → 415 V, 0 → 470 V 1.628kVA Surface Mount Clockwise 3 3 Wire Termination 12.9kg 150 x 200 x 330mm 2A 330mm - 150mm
RS Stock No. 890-2872
BrandRS PRO
TWD27,363.00
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. 890-2881
BrandRS PRO
TWD16,882.00
Each
units
240V ac 0 → 240V ac 1.2kVA Stand Alone Clockwise 1 - Wire Termination 10kg 280 x 200 x 200mm 5A 200mm - 280mm
RS Stock No. 122-6780
Mfr. Part No.MVT14.7k/18A-3
TWD29,484.00
Each
units
415V - 14.7kVA - - 3 - Clamp - 190 x 220 x755mm - 755mm - 190mm
RS Stock No. 890-2844
BrandRS PRO
TWD10,549.00
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
TWD5,373.00
Each
units
240V - 2.5kVA Panel Mount Clockwise 1 1 Clamp 15kg 185 (Ø) x 174mm - - 185mm 174mm
RS Stock No. 890-2888
BrandRS PRO
TWD74.00
Each
units
- - - Surface Mount - - - Wire Termination 5g 10.5 x 3mm - 3mm 10.5mm -
RS Stock No. 117-6020
Mfr. Part No.MVT1k/3.5A-1E
TWD21,483.00
Each
units
240V - 1kVA Surface Mount Clockwise 1 1 - 10kg 275 x 214 x 270mm 13A - - 275mm
RS Stock No. 890-2850
BrandRS PRO
TWD35,373.00
Each
units
415V 0 → 415 V, 0 → 470 V 8.14kVA Surface Mount Clockwise 3 3 Wire Termination 33.5kg 200 x 250 x 425mm 10A 425mm - 200mm
RS Stock No. 890-2875
BrandRS PRO
TWD22,251.00
Each
units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 280 x 200 x 200mm 10A 200mm - 280mm
RS Stock No. 890-2862
BrandRS PRO
TWD14,711.00
Each
units
240V ac 0 → 240V ac 720VA Stand Alone Clockwise 1 - Wire Termination 6kg 230 x 140 x 140mm 3A 140mm - 230mm
RS Stock No. 122-6781
Mfr. Part No.MVT4.2k/5A-3E
TWD23,077.00
Each
units
415V - 4.2kVA Free Standing - 3 - Clamp - 245 x 250 x 595mm - 595mm - 245mm
RS Stock No. 890-2819
BrandRS PRO
TWD12,342.00
Each
units
240V 0 → 240 V, 0 → 270 V 2.4kVA Surface Mount Clockwise 1 1 Wire Termination 9.4kg 175 x 175 x 170mm 10A 170mm - 175mm