Traditional analog meters are mechanical devices found near the service entrance. The service line of the utility enters the building. The mechanical device is either accessed from the elevated line that enters the weather station and descends through the conduit to the meter, or from the underground service line. Entered. The meter is usually housed in a glass enclosure with a metal plate inside, which rotates as the circuits in the building draw current from the service line. If you observe the disc, you can see that it moves slower when power consumption is low (for example, at night), and moves faster during peak usage hours.

Mechanical instruments use two conductor coils that generate a magnetic field. A coil is affected by the current flowing through the conductor. The other coil is affected by the voltage across the conductor. Together, the magnetic field generated by the coil turns a thin aluminum disk at a controlled speed. (Aluminum is not magnetic, but in this case moves by a principle called eddy current). The disc turns a series of gears to move the five dials and records the amount of electricity in kilowatt hours. This mechanism is called an indicator.

The power consumption is manually read by the utility service personnel who have to visit the home to read the numbers on the dial. Mechanical meters cannot be read remotely. Calculate the electricity consumption of the building by subtracting the figures from the previous month from the readings of this month.

Savvy consumers can learn to read these dials to understand their power consumption and verify that utility charges are accurate.

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