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This electromagnetic induction phenomenon is the basis of transformer action and, in accordance with Lenz's law, the secondary current so produced creates a flux equal and opposite to that produced by the primary winding. This varying flux at the secondary winding induces a varying electromotive force or voltage in the secondary winding. Transformers range in size from RF transformers less than a cubic centimeter in volume, to units weighing hundreds of tons used to interconnect the power grid.Ī varying current in the transformer's primary winding creates a varying magnetic flux in the transformer core, which is also encircled by the secondary winding. A wide range of transformer designs is encountered in electronic and electric power applications. Since the invention of the first constant-potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electric power. Transformers can also be used to provide galvanic isolation between circuits as well as to couple stages of signal-processing circuits. Transformers are used to change AC voltage levels, such transformers being termed step-up or step-down type to increase or decrease voltage level, respectively. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits.

A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. The photographs will ensure that replacement or refund can then be processed with the minimum of delay.A basic transformer consisting of two coils of copper wire wrapped around a magnetic coreĪ transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. The correct paperwork can then be sent to us.

We will notify you in advance if this is likely to happen.Īny items being returned as damaged in transit, requiring replacement or refund, should notify us either verbally or in writing within 48 hours of delivery, must be accompanied by clear photographs showing both the packaging - particularly any damage to the packaging - and also the damaged item(s). These items may take longer than the expected delivery time. If there are items which state a longer delivery time then please contact us as we can arrange a next day on most items at an additional cost where applicable.Īny items that are not stock items will be ordered and sent directly from suppliers, all manufactures we use are highly recommended, also despatched via traceable and insured carriers. We would like to work with you to arrange a better suited delivery time or date.Īll in stock items are despatched via traceable and insured carriers on a next day service.

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If you have a deadline then please feel free to contact us by email or phone. Out of stock items can take up to the recommended Delivery Time which you can find on every product page, we will notify you if they are likely to take any longer than this. We despatch in-stock items on the same working day when they are ordered before 4PM GMT. Depending on your area, there will usually be a carriage paid order value threshold where FREE delivery can still be attained. This charge is calculated based on the overall order value and the delivery postcode area. *A very small number of large heavy items may attract an additional pallet charge to certain areas. UK Delivery: Orders over £150 excluding VAT - FREE DELIVERY* Orders under £150 excluding VAT - Delivery £7.50 excl VAT

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