Watthour Meter

A Watthour Meter, also known as an electricity meter or energy meter, is a device used to measure the amount of electrical energy consumed by a residential, commercial, or industrial electrical installation. It is typically installed by utility companies to accurately measure and bill customers for their electricity usage.

The Watthour Meter falls under the supply class "Electrical And Electronic Properties Measuring And Testing Instruments" in the supply group "Instruments And Laboratory Equipment." This class includes various instruments used to measure and test electrical and electronic properties, such as voltage, current, resistance, power, and energy.

The Watthour Meter is designed to measure the total energy consumed over a specific period, usually in kilowatt-hours (kWh). It consists of a mechanical or digital display that shows the energy consumption, as well as various internal components such as current transformers, voltage transformers, and a rotating disc or electronic circuitry to measure the energy flow.

These meters are typically connected in series with the electrical supply line and measure the current and voltage passing through them to calculate the energy consumed. They are highly accurate and reliable, ensuring fair billing for electricity usage.

In addition to residential and commercial applications, Watthour Meters are also used in laboratory settings for research, testing, and calibration purposes. They play a crucial role in monitoring and managing energy consumption, promoting energy efficiency, and ensuring the proper functioning of electrical systems.