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. 117-6024
Mfr. Part No.MVT4.9k/18A-1E
HK$7,070.66
Each
units
240V - 4.9kVA Surface Mount Clockwise 1 1 - 25kg 315 x 250 x 280mm - - - 315mm
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. 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. 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. 890-2774
BrandRS PRO
HK$1,291.07
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. 890-2884
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. 890-2783
BrandRS PRO
HK$2,860.88
Each
units
240V 0 → 240 V, 0 → 270 V 2.4kVA Surface Mount Clockwise 1 1 Wire Termination 8.5kg 175 x 175 x 135mm 10A 135mm - 175mm
RS Stock No. 890-2897
BrandRS PRO
HK$18.29
Each
units
- - - Surface Mount - - - Wire Termination 5g 6 x 2.5 x 10mm - 10mm - 6mm
RS Stock No. 890-2838
BrandRS PRO
HK$2,130.14
Each
units
240V 0 → 240V 960VA Surface Mount Clockwise 1 1 Wire Termination 5.6kg 165 x 165 x 120mm 4A 120mm 165mm 165mm
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. 890-2847
BrandRS PRO
HK$2,450.45
Each
units
240V 0 → 240V 1.44kVA Surface Mount Clockwise 1 1 Wire Termination 6.2kg 165 x 165 x 125mm 6A 125mm 165mm 165mm
RS Stock No. 890-2888
BrandRS PRO
HK$19.99
Each
units
- - - Surface Mount - - - Wire Termination 5g 10.5 x 3mm - 3mm 10.5mm -
RS Stock No. 117-6021
Mfr. Part No.MVT1.4k/5A-1E
HK$2,988.95
Each
units
240V - 1.4kVA Surface Mount Clockwise 1 1 - 13kg 275 x 210 x 270mm 13A - - 275mm
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. 890-2875
BrandRS PRO
HK$5,983.92
Each
units
240V ac - 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 280 x 200 x 200mm 10A 200mm - 280mm
RS Stock No. 890-2844
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
RS Stock No. 117-6023
Mfr. Part No.MVT3.3k/12A-1E
HK$5,939.87
Each
units
240V - 3.3kVA Surface Mount Clockwise 1 1 - 20kg 315 x 250 x 280mm - - - 315mm
RS Stock No. 890-2831
BrandRS PRO
HK$1,479.04
Each
units
240V 0 → 240V 480VA Surface Mount Clockwise 1 1 Wire Termination 3.1kg 113 x 130 x 127mm 2A 127mm 113mm 113mm
RS Stock No. 890-2872
BrandRS PRO
HK$7,846.24
Each
units
240V ac 0 → 240V ac 2.4kVA Stand Alone Clockwise 1 - Wire Termination 12kg 270 x 210 x 200mm 10A 200mm - 270mm