What is the impact of the energy meter not being connected to the neutral line

Energy meters. Failure to connect the neutral wire can make the circuit a safety hazard.

Because the neutral line plays a protective role in the circuit. The neutral line is the neutral point on the secondary side of the generator or transformer.

n) The line drawn out forms a circuit with the phase wire (L) to supply power to the electrical equipment. Normally, the neutral wire is repeatedly grounded with the protective ground wire (PE) at the neutral point (N) on the secondary side of the transformer.

pen), which plays a double protective role.

The neutral line is mainly used in the working circuit, the main trunk line that leads from the neutral point of the generator and transformer and is grounded; It is not used for working circuits, only as protective wires. Using the absolute "0" voltage of the earth, when the leakage of the device housing occurs, the current will quickly flow into the ground, even if a PE line occurs.

If there is an open path, it will also flow into the ground from a nearby grounding body.

Many people think that the zero line only needs one inlet meter, but in fact, this is not allowed by the power plant! Why? If the neutral line connected to the meter is not in good contact with the meter, the voltage coil of the meter loses voltage, the meter will stop rotating, and the user can still use electricity, and the power plant will suffer.

And when the user's neutral line is connected to the meter, this will not happen, because the user will not be able to use electricity, and the power plant will not suffer. The standard wiring method is that the user's live wire and neutral wire must pass through the meter, and the current coil of the meter must be the live wire. Understanding 2:

The zero line of the meter outlet is not connected to the meter, and it is directly connected to the ground", which means that the zero line of your home is not connected to the meter, but directly connected to the ground? This is very dangerous, which is equivalent to a fire and a place of electricity method, although it is not to talk about stealing electricity, but the potential safety hazards must be eliminated! And what I stated above:

The user's zero line does not pass through the meter, and the power plant is not allowed!

Don't go. The three-phase electric energy meter is equivalent to three single-phase electric energy meters, and there is no zero line to form a loop, and the meter will not go, so it cannot be accurately measured. In order to measure accurately and reliably, the three-phase four-wire electric energy meter adopts the star connection method, if there is no zero line, the neutral point will drift with the load, the voltage between the metering elements is unstable, and the metering function is not accurate.

Don't go. The three-phase four-wire low-voltage watt-hour meter measures the three-phase 220V voltage of the watt-hour meter, and its input voltage specification is 220 380V, that is to say, the phase voltage is 220V, and the line voltage between any two phases is 380V.

The three-phase electric energy meter is equivalent to three single-phase electric energy meters, and it cannot form a loop without a neutral line and cannot be accurately measured.

Reasons why it is necessary to connect the neutral line:

1. In order to measure accurately and reliably. The three-phase four-wire electric energy meter adopts the star connection, if there is no grounding wire, the neutral point will drift with the load, so that the voltage between the metering elements is unstable, and the metering function is not accurate.

2. Easy to use. Generally, users who install three-phase four-wire watt-hour meters not only use three-phase motors, but also generally need to use 220V voltage for lighting, so this requires a neutral line.

The three-phase four-wire meter can not be connected to the zero line, although there is no 220 volt voltage in the meter, but the three voltage coils in the meter are connected according to the star shape, so it can work normally without the zero line. However, if the zero line is not connected, when the three-phase is unbalanced, the meter will have less words. It is also possible to burn out the meter.

Hello dear and happy to answer your <>

If the pro-family meter does not connect to the zero line, the meter can only form a protection mechanism when it is connected to a live line and a neutral line, and the meter can work on the journey; If you only connect one live wire, the meter will not work. The connection between the live wire and the neutral wire of the meter: from left to right, the leftmost live wire, the live wire connected by an interface, and the zero wire connected again; The last one, the one on the far right, takes out the zero line.

When using an energy meter, it should be noted that in the case of low voltage (no more than 500 volts) and small current (tens of amps), the energy meter can be directly connected to the circuit for measurement. In the case of high voltage or high current, the energy meter cannot be directly connected to the line, and needs to be used with a voltage transformer or a current transformer. I hope this service can help you, you can click on my avatar to follow me, and if you have any questions in the future, you can consult me again, and look forward to serving you again.

Wishing you well; Happy life, everything goes well [warm] [warm].

Summary. Hello dear, the zero line of the outgoing line of the single-phase meter can not be connected to the meter, the single-phase meter only measures the current of the live wire, but the zero line of the incoming line of the meter must be connected, otherwise the circuit board inside the meter will not work without power supply.

Hello, I have seen your question, and I am sorting out the answer, please wait for a while Hello dear, the zero line of the single-phase meter can not be connected to the meter, the single-phase meter only measures the current of the live wire, but the incoming zero line of the meter must be connected, otherwise the circuit board inside the meter will not work without power supply.

I only take the line of fire and turn it.

Hello dear, the direct line of fire will turn, but the reading is not accurate.

For the first time, I took two wires of fire.

Hello dear, it is easy to cause short circuits and even fires.

Also turn. It's all in the line of fire.

It can be turned, but it may cause circuit failure.

Why didn't the meter burn out when I connected two live wires?

But they are all connected to two gates.

Hello dear, there is a possibility of damage, but not necessarily.

The electronic meter is only connected to a live wire, and the zero line does not go to the meter, will the meter go?

The electronic meter is only connected to a live wire and the zero line does not go to the meter, will the meter go dear, hello, 1 electronic watt-hour meter has a voltage converter inside, a current converter, if the incoming and outgoing lines are connected to the fiber live wire, the zero line bypasses the meter. Then the meter has no voltage supply, and the meter cannot work properly. If the incoming wire is connected to the live wire and the neutral wire, the outgoing wire is only connected to the live wire, not the neutral wire.

In that way, the meter can work normally, and the zero line inside the meter itself is short-circuited. I hope I am helpful to you, thank you, and I wish you a happy life! <>