The Common Sense Of Household Electricity Meters, Used In Life

In daily life, we often use electric energy meters to accurately measure the energy consumption. Today we will learn how to measure electric energy together.

A total of four tasks, master the concept of electric energy meter; familiar with the structural classification of electric energy meter; understand the application of electric energy meter; learn the installation and use of electric energy meter.

In many residential districts, there is a distribution box with an electric energy meter, which records the electricity consumption of each household, and we pay electricity accordingly.

First let's look at the concept of electric energy meter. Electric energy meter is an instrument used to measure electric energy, also known as watt-hour meter, fire meter, kilowatt / hour meter.

Calculation formula of electric energy: W = Pt, W = UIt, W = I²Rt, W = U²t / R

Active energy meter unit: kw · h, commonly known as degree, represents the electrical energy consumed by an electrical appliance with a power of 1 kW for one hour of work.

Let's look at the structural classification of electric energy meters.

First let's look at the concept of electric energy meter. Electric energy meter is an instrument used to measure electric energy, also known as watt-hour meter, fire meter, kilowatt / hour meter.

Calculation formula of electric energy: W = Pt, W = UIt, W = I²Rt, W = U²t / R

Active energy meter unit: kw · h, commonly known as degree, represents the electrical energy consumed by an electrical appliance with a power of 1 kW for one hour of work.

Let's look at the structural classification of electric energy meters.

The measurement parameters, such as the energy meter's measurement parameter is 800imp / kwh, which means that for each kilowatt-hour of electrical energy consumed by electrical appliances, the aluminum meter of the energy meter has to be turned 800 revolutions.

Electric energy meters are often classified according to the number of connected phases. Electric energy meters can be divided into single-phase electric energy meters, three-phase three-wire electric energy meters, and three-phase four-wire electric energy meters.

The application environment of the energy meter has the following requirements:

1. Install on a wall or switch board that is not susceptible to vibration.

2. In order to ensure the accuracy of work, the electric energy meter must be installed vertically.

3. There should be no joints between the wires of the energy meter.

4. The selection of electric energy meters must be compatible with the total power of the electrical appliances.

When installing the energy meter, the position of the device should be considered, and it must have a certain correspondence with the main circuit. The same device should be placed together to achieve a reasonable layout, proper spacing, and convenient wiring.

Before power-on debugging, use the wiring diagram to check whether the wiring is correct, turn on the power switch, close the load switch, observe the phenomenon of the energy meter when the circuit increases the load, and the energy meter starts counting.

The connection method of the three-phase three-wire energy meter and the three-phase four-wire energy meter is the same as that of the single-phase energy meter.