Voltage Optimisation through transformer supply (fixed tap)

Our highly efficient Wilson e3 range of amorphous core distribution transformers come with an additional tapping range at no extra cost. This enables you to optimise voltage supply from 415V to 5 different voltages from 394.25V to 446.125V according to your site’s needs wherever your incoming supply is at medium voltage without the need for additional equipment.

Our Wilson e3+ Ultra Low Loss Amorhpus transformers come with MR Ecotap VPD on-load tap changer that allows you to manage the voltage without any power disruption. There are 9 tap positions on the HV side: between -6% and 6% with 1.5 increments. An option with 17 tap positions is available as well.

Apart from being a particularly cost effective way of optimising site voltage, the transformer will integrate smoothly with your existing installations, avoiding additional system losses and minimising space requirements.


Voltage Regulation through transformer supply (dynamic regulation via OLTC)

Where site supply voltages fluctuate or a constant (+/- 1%) output voltage is required, the Wilson e3+ transformer comes with a 9 or 17 position on load tap changer (OLTC). This adjusts the taps automatically to maintain a constant secondary output voltage.

Typical applications are sites with irregular supply patterns including random peaks and troughs as well as distinct day and night patters, highly sensitive operating equipment requiring stable supply voltage and improving site resilience in view of increasingly dirty supply from the grid.


Case Study - ASDA - Wilson e2+

The commitments made by ASDA to reduce their energy usage lead them to discover our previous range super low loss amorphous Wilson e2+ transformer. Not only does the transformer help reduce overall energy losses in the amorphous core, but the additional Voltage Regulation System means ASDA can control its voltage output dynamically, giving their stores extra power as and when they need it.

The installed distribution transformers have cut energy usage by 7%, saving them over £25,000 a year in unnecessary costs. The project has nearly paid for itself twice over since installation, and with our recommended minimum transformer life of 25 years they will remain an excellent long term investment.

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