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. 117-6012
Mfr. Part No.MVT0.3/1.1A-1
€90.34
Each
units
240V - 300VA Panel Mount Clockwise 1 1 Clamp 5kg 103 (Dia.) x 172mm - - 103mm 172mm
RS Stock No. 117-6014
Mfr. Part No.MVT1k/3.5A-1
€99.99
Each
units
240V - 1kVA Panel Mount Clockwise 1 1 Clamp 8kg 155 (Dia.) x 176mm - - 155mm 176mm
RS Stock No. 117-6017
Mfr. Part No.MVT3.3k/12A-1
€185.15
Each
units
240V - 3.3kVA Panel Mount Clockwise 1 1 Clamp 18kg 205 (Dia.) x 178mm - - 205mm 178mm
RS Stock No. 117-6016
Mfr. Part No.MVT2.5k/9A-1
€136.44
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
€622.07
Each
units
240V - 1350VA Free Standing Clockwise 1 3 Wire Termination 16.5kg 230 x 200 x 365mm - - - 230mm
RS Stock No. 122-6779
Mfr. Part No.MVT9.9k/12A-3
€548.42
Each
units
415V - 9.9kVA - - 3 - Clamp - 190 x 220 x 680mm - 680mm - 190mm
RS Stock No. 122-6785
Mfr. Part No.MVTC-UK9A
€746.48
Each
units
240V - 2430VA Free Standing Clockwise 1 3 - 20.5kg 230 x 200 x 365mm - - - 230mm
RS Stock No. 117-6015
Mfr. Part No.MVT1.4k/5A-1
€113.69
Each
units
240V - 1.4kVA Panel Mount Clockwise 1 1 Clamp 11kg 170 (Dia.) x 176mm - - 170mm 176mm
RS Stock No. 117-6020
Mfr. Part No.MVT1k/3.5A-1E
€545.55
Each
units
240V - 1kVA Surface Mount Clockwise 1 1 - 10kg 275 x 214 x 270mm 13A - - 275mm
RS Stock No. 117-6018
Mfr. Part No.MVT4.9k/18A-1
€237.18
Each
units
240V - 4.9kVA Panel Mount Clockwise 1 1 Clamp 23kg 205 (Dia.) x 203mm - - 205mm 203mm
RS Stock No. 122-6782
Mfr. Part No.MVT9.9k/12A-3E
€811.27
Each
units
415V - 9.9kVA Free Standing - 3 - Clamp - 285 x 280 x 630mm - 630mm - 285mm
RS Stock No. 122-6783
Mfr. Part No.MVT14.7k/18A-3E
€1,010.09
Each
units
415V - 14.7kVA Free Standing - 3 - Clamp - 285 x 280 x 690mm - 690mm - 285mm
RS Stock No. 122-6778
Mfr. Part No.MVT4.2k/5A-3
€406.04
Each
units
415V - 4.2kVA - - 3 - Clamp - 160 x 180 x 646mm - 646mm - 160mm
RS Stock No. 117-6022
Mfr. Part No.MVT2.5k/9A-1E
€413.82
Each
units
240V - 2.5kVA Surface Mount Clockwise 1 1 - 18.5kg 275 x 214 x 270mm 13A - - 275mm
RS Stock No. 117-6023
Mfr. Part No.MVT3.3k/12A-1E
€560.90
Each
units
240V - 3.3kVA Surface Mount Clockwise 1 1 - 20kg 315 x 250 x 280mm - - - 315mm
RS Stock No. 122-6780
Mfr. Part No.MVT14.7k/18A-3
€739.59
Each
units
415V - 14.7kVA - - 3 - Clamp - 190 x 220 x755mm - 755mm - 190mm
RS Stock No. 117-6021
Mfr. Part No.MVT1.4k/5A-1E
€552.75
Each
units
240V - 1.4kVA Surface Mount Clockwise 1 1 - 13kg 275 x 210 x 270mm 13A - - 275mm
RS Stock No. 117-6024
Mfr. Part No.MVT4.9k/18A-1E
€667.68
Each
units
240V - 4.9kVA Surface Mount Clockwise 1 1 - 25kg 315 x 250 x 280mm - - - 315mm
RS Stock No. 122-6781
Mfr. Part No.MVT4.2k/5A-3E
€578.87
Each
units
415V - 4.2kVA Free Standing - 3 - Clamp - 245 x 250 x 595mm - 595mm - 245mm
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