ENERSYSEngineers

Energy audit & energy management

Most industrial plants pay for power twice — once in units consumed, and again in demand charges, penalties and losses nobody has measured.

Consultancy · In short

An electrical energy audit measures how a plant actually consumes power and identifies where that consumption can be reduced. Enersys Engineers carries out load and demand profiling, power factor and reactive power analysis, harmonic measurement, transformer and motor loss assessment, lighting and auxiliary load review, and tariff and contract demand optimisation — then quantifies each recommendation with an indicative saving and payback so the owner can rank them by return rather than by effort. It is the operational counterpart to design-stage system studies: the plant is measured as it runs, not as it was drawn.

Load profilingPower factorHarmonicsTransformer lossesTariff optimisationPayback analysis
GENERATIONThermal · SolarSTEP-UP11 / 220 kVTRANSMISSIONup to 400 kVSUBSTATION220 / 33 kVDISTRIBUTION33 / 11 kVENERSYS SCOPE — END TO END

What the audit measures

An audit that only reads the monthly bill tells you what you spent, not why. The measurement work is what turns a bill into a list of actions — logging demand over a full production cycle, recording power factor and harmonics at the incomer and at the major loads, and thermally surveying the distribution equipment under real load.

Load and demand profileLogged over a representative production cycle to establish the real maximum demand, the load factor, and where the peaks are actually set.
Power factor and reactive powerMeasured at the incomer and at major loads, with capacitor bank condition and switching behaviour assessed rather than assumed.
Harmonic distortionVoltage and current THD and individual harmonic orders, with the contribution of drives and rectifier loads identified.
Transformer lossesNo-load and load losses against the real loading profile — which frequently shows transformers running far below the loading they were sized for.
Motor loadingOperating load as a proportion of rating, identifying oversized motors running at poor efficiency and poor power factor.
Thermal surveyInfrared survey of panels, joints and terminations under load, catching loss points that are also failure points.
Tariff and contract demandBilled demand against measured demand, and the applicable OERC tariff category, to test whether the contract demand and tariff are the right ones.

What you get back

The deliverable is a ranked action list, not a description of the plant. Every recommendation carries a measured basis, an estimated annual saving and an indicative payback, so capital goes to the items that return it fastest.

  • Measured baseline — demand profile, load factor, power factor and distortion as found
  • Energy and cost breakdown by section, feeder and major load
  • Ranked recommendations, each with estimated annual saving and indicative payback
  • Power factor correction and harmonic mitigation scheme where the measurements justify one
  • Contract demand and tariff recommendation against the applicable OERC schedule
  • Loss-reduction items in distribution — transformer loading, cable sizing, terminations
  • Implementation plan separating no-cost and low-cost items from capital items

Energy management, after the audit

An audit is a snapshot. Savings persist only when consumption keeps being watched, which is why the metering and monitoring arrangement matters as much as the recommendations themselves.

Where a plant wants continuous visibility we specify the energy metering, integrate it into the existing SCADA or a standalone energy management system, and set the reporting so that a drifting power factor or a creeping demand peak is visible in the month it happens rather than in the annual review.

Questions

Frequently asked

How is an energy audit different from a power system study?

A power system study is design-stage analysis — fault levels, relay coordination, load flow — carried out on a model to decide equipment ratings and protection settings. An energy audit is operational: it measures a running plant to find consumption that can be reduced. Enersys does both, and they inform each other, because an audit frequently reveals loading the original study assumed differently.

How long does an energy audit take?

The measurement window is the constraint, not the analysis. Demand and power factor need logging across a representative production cycle — typically a week for a continuous process, longer where production is batched or seasonal. The report follows within two to three weeks of the measurement closing.

What savings are typical?

It depends entirely on what has been measured before. Plants that have never audited power factor, contract demand and transformer loading usually find material savings in those three alone, because they compound every month and nobody is watching them. We do not quote a headline percentage before measuring — every recommendation in our report carries its own calculated saving and payback.

Do you implement the recommendations as well?

Yes. Capacitor banks, harmonic filters, transformer and cable changes, and metering and monitoring systems all fall within our EPC and panel manufacturing scope, so a recommendation can be executed by the same team that measured the need for it.

Liable With Energy

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