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. 122-6779
Mfr. Part No.MVT9.9k/12A-3
HK$6,440.99
Each
units
415V - 9.9kVA - - 3 - Clamp - 190 x 220 x 680mm - 680mm - 190mm
RS Stock No. 117-6016
Mfr. Part No.MVT2.5k/9A-1
HK$1,473.76
Each
units
240V - 2.5kVA Panel Mount Clockwise 1 1 Clamp 15kg 185 (Ø) x 174mm - - 185mm 174mm
RS Stock No. 122-6780
Mfr. Part No.MVT14.7k/18A-3
HK$8,262.29
Each
units
415V - 14.7kVA - - 3 - Clamp - 190 x 220 x755mm - 755mm - 190mm
RS Stock No. 117-6020
Mfr. Part No.MVT1k/3.5A-1E
HK$5,777.29
Each
units
240V - 1kVA Surface Mount Clockwise 1 1 - 10kg 275 x 214 x 270mm 13A - - 275mm
RS Stock No. 890-2840
BrandRS PRO
HK$2,509.33
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. 117-6017
Mfr. Part No.MVT3.3k/12A-1
HK$1,960.77
Each
units
240V - 3.3kVA Panel Mount Clockwise 1 1 Clamp 18kg 205 (Ø) x 178mm - - 205mm 178mm
RS Stock No. 890-2787
BrandRS PRO
HK$4,262.80
Each
units
240V 0 → 240 V, 0 → 270 V 3.6kVA Surface Mount Clockwise 1 1 Wire Termination 13kg 225 x 225 x 135mm 15A 135mm - 225mm
RS Stock No. 122-6781
Mfr. Part No.MVT4.2k/5A-3E
HK$6,268.05
Each
units
415V - 4.2kVA Free Standing - 3 - Clamp - 245 x 250 x 595mm - 595mm - 245mm
RS Stock No. 890-2894
BrandRS PRO
HK$71.36
Each
units
- - - Surface Mount - - - Wire Termination 10g 12.5 x 3 x 16mm - 16mm - 12.5mm
RS Stock No. 122-6778
Mfr. Part No.MVT4.2k/5A-3
HK$4,597.51
Each
units
415V - 4.2kVA - - 3 - Clamp - 160 x 180 x 646mm - 646mm - 160mm
RS Stock No. 122-6784
Mfr. Part No.MVTC-UK5A
HK$6,669.17
Each
units
240V - 1350VA Free Standing Clockwise 1 3 Wire Termination 16.5kg 230 x 200 x 365mm - - - 230mm
RS Stock No. 890-2881
BrandRS PRO
HK$4,540.01
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. 890-2780
BrandRS PRO
HK$2,286.42
Each
units
240V 0 → 240 V, 0 → 270 V 1.92kVA Surface Mount Clockwise 1 1 Wire Termination 7.8kg 175 x 175 x 130mm 8A 130mm - 175mm
RS Stock No. 117-6018
Mfr. Part No.MVT4.9k/18A-1
HK$2,511.63
Each
units
240V - 4.9kVA Panel Mount Clockwise 1 1 Clamp 23kg 205 (Ø) x 203mm - - 205mm 203mm
RS Stock No. 890-2890
BrandRS PRO
HK$59.60
Each
units
- - - Surface Mount - - - Wire Termination 7g 9.5 x 2.5 x 14mm - 14mm - 9.5mm
RS Stock No. 122-6782
Mfr. Part No.MVT9.9k/12A-3E
HK$8,784.65
Each
units
415V - 9.9kVA Free Standing - 3 - Clamp - 285 x 280 x 630mm - 630mm - 285mm
RS Stock No. 890-2884
BrandRS PRO
HK$11,039.09
Each
units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 270 x 210 x 200mm 10A 200mm - 270mm
RS Stock No. 890-2800
BrandRS PRO
HK$2,832.19
Each
units
240V 0 → 240 V, 0 → 270 V 1.92kVA Surface Mount Clockwise 1 1 Wire Termination 8.8kg 175 x 175 x 170mm 8A 170mm - 175mm
RS Stock No. 890-2816
BrandRS PRO
HK$4,999.52
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. 890-2844
BrandRS PRO
HK$2,836.91
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