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Step 2How it works. Electromechanical meter
Electromechanical meters are described very clearly here.
The key point: metering is based on the product of two electrical entities, current I and
voltage V; power is the product of these two entities, V and I. Energy is calculated integrating
over time (that is adding together time after time) the V*I products. It is energy what we are
paying for.
Within electromechanical meters V and I feed two coils: the voltage coil (which is in parallel to
the line) requiring low power and a current coil (in series with the line) made of thick copper wire.
Metering can be stopped or started interrupting the connection to the voltage coil.
The key point: metering is based on the product of two electrical entities, current I and
voltage V; power is the product of these two entities, V and I. Energy is calculated integrating
over time (that is adding together time after time) the V*I products. It is energy what we are
paying for.
Within electromechanical meters V and I feed two coils: the voltage coil (which is in parallel to
the line) requiring low power and a current coil (in series with the line) made of thick copper wire.
Metering can be stopped or started interrupting the connection to the voltage coil.
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