Solution

Main Meter and Transformer Monitoring

Track TEDAS day / peak / night bands in real time through the transformer as your electrical main meter. With a sub-meter hierarchy the double-counting risk is zero and cost allocation is correct.

What Is Main Meter and Transformer Monitoring?

Track TEDAS day / peak / night bands in real time through the transformer as your electrical main meter. With a sub-meter hierarchy the double-counting risk is zero and cost allocation is correct.

Who Is It For?

  • Facility managers who sum transformer and sub-meters together and end up double counting
  • Energy teams that want to reconcile the distributor invoice against their own system
  • Technical directors optimising cost across day, peak and night tariff bands
  • Factories, hospitals and shopping centres with more than one transformer
  • Managers who need correct main-source data to allocate energy to sub-tenants
Common Problems
The most critical energy management challenges faced in the field

Double-Counting Risk

When the transformer and the sub-meters are summed together, energy is counted twice and the cost figures inflate.

Sub-Meter Confusion

Which meter represents main consumption and which one sub-consumption? Allocation is impossible until the hierarchy is established.

No Day / Peak / Night Breakdown

Without separating day, peak and night consumption, tariff optimisation and budget calculations stay wrong.

The Distributor Invoice Cannot Be Verified

If the energy data in the system is never compared with the distributor invoice, loss and theft cannot be detected.

How Argus EMS Solves Them
Real-time monitoring, automatic alarms and comprehensive reporting

Transformer = Electrical Main Meter

The transformer marked as the main meter is the single source for every kWh, cost and forecast calculation.

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Sub-Meter Hierarchy

Floor, apartment or tenant meters under the transformer are defined hierarchically and excluded from the SUM.

Real TEDAS Day / Peak / Night Bands

Hourly consumption is split into day, peak and night according to the actual TEDAS tariff bands.

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Invoice Comparison

External invoice kWh is compared against the system measurement; a gap above 3% raises a loss or theft warning.

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Monthly Trend Chart

Monthly kWh trend and cost split across the day, peak and night bands - a clear view for tariff optimisation.

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Multiple Transformer Support

More than one main transformer can be defined; each is tracked as a separate cost centre.

Frequently Asked Questions
Why is the transformer used as the main meter?

Because not every panel on site necessarily has an energy analyser, the transformer outgoing measurement is what shows the facility's true total consumption. Summing it together with sub-meters leaves a gap for the panels that have no analyser and produces an error.

How are the day, peak and night bands calculated?

Argus EMS splits hourly consumption according to the current TEDAS bands - day (06:00-17:00), peak (17:00-22:00) and night (22:00-06:00). The band hours are configurable.

How is it managed when there is more than one transformer?

Each transformer can be marked as a main meter. The total of all active main meters is used per project. A separate dashboard and cost report can be viewed for each transformer.

Can sub-meters be used for billing?

Yes. Sub-meters are used for tenant and apartment billing but are excluded from the total energy cost calculation. This is the most common arrangement in shopping-centre and office scenarios.

What This Solution Measures
Quantities measured in the field and the outputs produced from them
Main meter measurement
Main meters and sub-meters are defined as separate roles
Totals are taken only from the main source; double counting is prevented architecturally
The gap between the main meter and the sum of sub-meters is tracked
Cost allocation
Electricity, water and natural gas are totalled separately without mixing
The day, peak and night breakdown is calculated against the tariff line
Allocation per cost centre is based on measured consumption
Technical Requirements
Main MeterThe transformer marked as main meter
ProtocolModbus TCP / RTU
Band CalculationTEDAS day, peak and night - on an hourly basis
Double-Counting PreventionSub-meters are excluded from the SUM automatically
Offline Buffer30 days - the monthly invoice calculation stays complete

Start main meter monitoring today

Accurate energy cost calculation without double-counting risk, plus invoice reconciliation.

Request a Demo → info@nevacontrol.com