What is the reverse direction of the electric meter?

When the meter is connected reversely, the neutral line and the phase line entering the meter are connected reversely, so it will be connected reversely.

According to its working principle, electric energy meters can be divided into electromechanical energy meters and electronic energy meters (also known as static energy meters and solid-state energy meters). Electromechanical watt-hour meter is a common electric energy metering instrument in AC circuit, among which inductive watt-hour meter is the most commonly used. Electronic watt-hour meters can be divided into full electronic watt-hour meters and electromechanical watt-hour meters.

When using the electric energy meter, it should be noted that under the conditions of low voltage (below 500 volts) and small current (tens of amperes), the electric energy meter can be directly connected to the circuit for measurement. In the case of high voltage or high current, the watt-hour meter cannot be directly connected to the line, and it needs to be used with voltage transformer or current transformer.

Extended data:

Working principle of electric energy meter

When the electric energy meter is connected to the circuit under test, alternating current flows in the current coil and the voltage coil, and these two alternating currents generate alternating magnetic flux in their iron cores respectively; The alternating magnetic flux passes through the aluminum disk and induces eddy current in the aluminum disk;

The eddy current is forced in the magnetic field, which makes the aluminum disk gain torque (active torque) and rotate. The greater the power consumed by the load, the greater the current flowing through the current coil, the greater the eddy current induced in the aluminum disk, and the greater the torque that makes the aluminum disk rotate.

That is, the torque is proportional to the power consumed by the load. The greater the power, the greater the torque, and the faster the aluminum disk rotates. When the aluminum disk rotates, it is acted by the braking torque generated by the permanent magnet, which is opposite to the driving torque.