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. 890-2890
BrandRS PRO
MYR34.50
Each
units
- - - Surface Mount - - - Wire Termination 7g 9.5 x 2.5 x 14mm - 14mm - 9.5mm
RS Stock No. 890-2853
BrandRS PRO
MYR4,348.58
Each
units
415V 0 → 415 V, 0 → 470 V 8.14kVA Surface Mount Clockwise 3 3 Wire Termination 27kg 175 x 175 x 410mm 10A 410mm - 175mm
RS Stock No. 890-2869
BrandRS PRO
MYR8,924.62
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. 890-2850
BrandRS PRO
MYR5,506.80
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. 890-2844
BrandRS PRO
MYR1,642.27
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. 890-2866
BrandRS PRO
MYR2,392.30
Each
units
240V ac - 1.2kVA Stand Alone Clockwise 1 - Wire Termination 10kg 280 x 200 x 200mm 5A 200mm - 280mm
RS Stock No. 890-2856
BrandRS PRO
MYR2,302.94
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. 890-2897
BrandRS PRO
MYR10.59
Each
units
- - - Surface Mount - - - Wire Termination 5g 6 x 2.5 x 10mm - 10mm - 6mm
RS Stock No. 117-6020
Mfr. Part No.MVT1k/3.5A-1E
MYR3,344.43
Each
units
240V - 1kVA Surface Mount Clockwise 1 1 - 10kg 275 x 214 x 270mm 13A - - 275mm
RS Stock No. 117-6016
Mfr. Part No.MVT2.5k/9A-1
MYR836.39
Each
units
240V - 2.5kVA Panel Mount Clockwise 1 1 Clamp 15kg 185 (Ø) x 174mm - - 185mm 174mm