Know About the Measurement of Electrical Energy and Power

Power is the rate at which energy is either being absorbed or produced by a circuit and an electrical quantity that is measured in watts in the electric energy meter. As it is a known fact that light bulbs and heaters absorb energy and that the higher their value in watts the more energy they will consume. Similarly, batteries and generators produce energy, and the more their electrical rating the more power they can deliver to the load. Watt is the unit of electrical power with its symbol being a large letter P.

Electrical power is completely related to energy which is the capacity to do work. It can be defined as the rate at which energy is transferred. If at a constant rate of one second one joule of work is either absorbed or delivered, then the corresponding power will be equivalent to one watt, so power P can be defined as 1Joule/sec = 1Watt. Then it can be said that one watt is equal to one joule per second and electrical power can be defined as the rate of doing work or the transferring of energy. The phase energy meter measures efficiently.

We can even define energy as being watts per second or joules. Hence, if the power is measured in kilowatts (thousands of watts) and the time in hours, then the unit of electrical energy is the kilowatt-hour, (kWh).

Power Rating

Electrical components are given a power rating in watts that means the maximum rate at which the component covers the electrical energy into another form of energy such as motion, heat, or light. So to convert one form of power to another, energy is used by electrical devices, for example, conversion of electrical energy into a mechanical force is done by an electrical motor.

Due to electrical and mechanical losses, the efficiency of an electrical device or motor will always be less than one (100%). If an electrical device has an efficiency rating of 85% then 15% is lost in heat or other losses and only 85% of the input power is transformed into mechanical work the other. You can buy ac energy meter online.