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.

...
Read more Read less

Filters

Viewing 1 - 20 of 60 products
Results per page
Description Price Primary Voltage Rating Secondary Voltage Rating Power Rating Mounting Type Knob Rotation Number of Phases Number of Outputs Termination Type Weight Dimensions Secondary Current Depth Diameter Length
RS Stock No. 890-2793
BrandRS PRO
£111.02
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. 890-2828
BrandRS PRO
£81.33
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
£67.03
Each
Units
240V 0 → 240 V, 0 → 270 V 170VA Surface Mount Clockwise 1 1 Wire Termination 1.4kg 83 x 80mm 700mA 96mm 83mm 80mm
RS Stock No. 890-2819
BrandRS PRO
£266.00
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
RS Stock No. 890-2869
BrandRS PRO
£1,235.49
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. 890-2799
BrandRS PRO
£93.06
Each
Units
240V 0 → 240 V, 0 → 270 V 170VA Surface Mount Clockwise 1 1 Wire Termination 1.9kg 160 x 130 x 160mm 700mA 160mm - 160mm
RS Stock No. 890-2806
BrandRS PRO
£215.34
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. 890-2850
BrandRS PRO
£762.34
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. 890-2856
BrandRS PRO
£318.81
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
£589.72
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. 890-2803
BrandRS PRO
£150.22
Each
Units
240V 0 → 240 V, 0 → 270 V 720VA Surface Mount Clockwise 1 1 Wire Termination 4.3kg 160 x 130 x 160mm 3A 160mm - 160mm
RS Stock No. 890-2774
BrandRS PRO
£94.06
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. 890-2822
BrandRS PRO
£88.86
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. 890-2816
BrandRS PRO
£400.66
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. 890-2881
BrandRS PRO
£374.75
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. 890-2825
BrandRS PRO
£514.72
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. 890-2844
BrandRS PRO
£234.17
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. 890-2862
BrandRS PRO
£317.04
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. 890-2875
BrandRS PRO
£479.55
Each
Units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 280 x 200 x 200mm 10A 200mm - 280mm
RS Stock No. 890-2812
BrandRS PRO
£394.31
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
Related Products
Carroll & Meynell variable autotransformers have variable voltages ...
Description:
Carroll & Meynell variable autotransformers have variable voltages and are ideal for controlling AC voltages. The rotating arm with a carbon brush changes the output voltage.These variacs feature round carbon brushes, riding any imperfections, offering a smoother operation. The round carbon brushes last the lifetime of the unit and are ...
Carroll & Meynell 3 phase transformers provide a ...
Description:
Carroll & Meynell 3 phase transformers provide a trouble free and efficient way of varying and controlling AC voltages. Variation of the output voltage is achieved by a rotating arm and a carbon brush that rolls around a winding commutator.These 3 phase variable autotransformers consist of three single phase variacs ...
Carroll & Meynell 3 phase transformers(enclosed) provide a ...
Description:
Carroll & Meynell 3 phase transformers(enclosed) provide a trouble free and efficient way of varying and controlling AC voltages. Variation of the output voltage is achieved by a rotating arm and a carbon brush that rolls around a winding commutator.These 3 phase variable autotransformers consist of three single phase variacs ...
Carroll & Meynell Carryvolt autotransformer is an ideal ...
Description:
Carroll & Meynell Carryvolt autotransformer is an ideal piece of portable test equipment for varying supply voltage. These carryvolt transformers have three optional output sockets to connect to the items being tested, they also incorporate meters for general indication. The carryvolt internally contains a round carbon brush for smoother operation ...