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How is mechanical energy measured?

How can electrical energy be measured?

  • More specifically, there is a power cable connecting a distant substation to a distant consumer. Only one conductor is used. The circuit is completed through the ground. I only have access to this one conductor. Is it possible to measure the amount of electrical energy being transferred from the substation to the consumer? If not, why? Is the actual concept of electrical energy flowing from power source to load through the wire flawed?

  • Answer:

    Neglecting "power factor" considerations, the current can be measured with either a series-connected or a "clamp on" style ammeter.  The voltage can be measured from the conductor to any reasonable ground, like a metal stake driven into the earth ground.  This "ground" would probably be OK unless the soil is really dry or like a sandy desert.  Power would then be simply the product of the measured voltage and measured amperes.

John Gerig at Quora Visit the source

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You need a plain old wattmeter.   If it's a small amount you can use something like the "http://www.amazon.com/P3-P4400-Electricity-Usage-Monitor/dp/B00009MDBU/ref=sr_1_1?ie=UTF8&qid=1399652741&sr=8-1&keywords=kill+watt+meter". If it's a lot of watts, you can buy big wattmeters too. You could measure the amperage with an ammeter, but that will give misleading results.

George Gonzalez

The regular electricity meter in the consumer house does measure the amount of electrical energy coming in with units of kWh.  Are you looking to quantify the transmission losses? Your question ain't very clear.

Ritesh Agarwal

The electric energy meter working involves computing the integral over time of the electrical power in Watts consumed on the power network delivered to a particular connection. This electrical power is measured by performing the product of the line current in Amps and the line voltage in Volts.For more info visit:https://www.electrikals.com/products/r/measuring-instruments%20/a?cid=620&cnid=230&page=1&pageSize=15

Robert Morkel

The standard measure of power utilization is the measure of watts utilized more than 60 minutes, which is the way we get the watt-hour (Wh). For instance, on the off chance that we retreat to that 40 W light: on the off chance that it's turned on for 60 minutes, it will utilize 40 Wh of power. A power charge records the quantity of kilowatt-hours (kWh) devoured over a timeframe, which is generally around three months. A kilowatt-hour is just 1,000 watt-hours. So for instance, utilizing a 4,000 W aeration and cooling system for one hour will devour 4 kWh of power (or 4,000 Wh).

Saurabh Pandey

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