Energy Saving in a Quarry

Energy saving amongst stone excavation plants is not beyond Energy Ace, as was demonstrated by our work at Cauldon Low Quarry, run by the Tarmac group of companies.

Annual Savings Achieved

  • £9,391.43
  • 54.41 tons CO2
  • 32,188 kW/h site
  • 101,311 kW/h inc transmission


  • 11 Months


  • Removal of reactive power charges
  • Reduction of 235 amps per phase
  • Reduction of 169 kVa demand
  • Improved utility

Tarmac installed a new processing plant complete with variable speed drives to reduce operating costs, although the degree of efficiency remained poor.
Tarmac contacted us for a solution to improve efficiency, remove the reactive power penalty charges and further reduce energy costs.
We delivered a turnkey project consisting of a harmonic blocking detuned power factor correction system to improve the overall efficiency to 0.99pf (99% efficient) from an uncorrected 80%.
The whole project returned the clients investment within 11 months.
For more information on how EnergyAce can benefit your organisation, call us now on 01695 559785 or email
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