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.
Product Details Price | Brand | 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 |
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£216.29 Each | RS PRO | 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 | ||||
£161.22 Each | RS PRO | 240V | 0 → 240V | 240VA | Surface Mount | Clockwise | 1 | 1 | Wire Termination | 1.6kg | 86 x 99 x 110mm | 1A | 110mm | 87mm | 113mm | ||||
£131.80 Each | RS PRO | 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 | ||||
£599.18 Each | RS PRO | 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 | ||||
£2,501.46 Each | RS PRO | 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 | ||||
£240.74 Each | RS PRO | 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 | ||||
£488.53 Each | RS PRO | 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 | ||||
£1,548.26 Each | RS PRO | 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 | ||||
£684.78 Each | RS PRO | 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 | ||||
£737.70 Each | RS PRO | 240V ac | 0 → 240V ac | 2.4kVA | Stand Alone | Clockwise | 1 | - | Wire Termination | 12kg | 270 x 210 x 200mm | 10A | 200mm | - | 270mm | ||||
£344.60 Each | RS PRO | 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 | ||||
£183.03 Each | RS PRO | 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 | ||||
£166.39 Each | RS PRO | 240V | 0 → 240V | 360VA | Surface Mount | Clockwise | 1 | 1 | Wire Termination | 2.6kg | 113 x 130 x 127mm | 1.5A | 127mm | 113mm | 113mm | ||||
£843.26 Each | RS PRO | 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 | ||||
£225.56 Each | RS PRO | 240V ac | 0 → 240V ac | 1.2kVA | Stand Alone | Clockwise | 1 | - | Wire Termination | 10kg | 280 x 200 x 200mm | 5A | 200mm | - | 280mm | ||||
£1,036.06 Each | RS PRO | 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 | ||||
£518.54 Each | RS PRO | 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 | ||||
£436.27 Each | RS PRO | 240V ac | 0 → 240V ac | 720VA | Stand Alone | Clockwise | 1 | - | Wire Termination | 6kg | 230 x 140 x 140mm | 3A | 140mm | - | 230mm | ||||
£659.89 Each | RS PRO | 240V ac | - | 2.4kVA | Stand Alone | Clockwise | 1 | - | Wire Termination | 12kg | 280 x 200 x 200mm | 10A | 200mm | - | 280mm | ||||
£816.86 Each | RS PRO | 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 | ||||