What will happen if the three-phase four-wire smart energy meter is not connected to the neutral wire?

If a three-phase four wire smart energy meter is not connected to the neutral wire, it may cause the following situations:

Voltage anomaly: Smart energy meters rely on a three-phase four wire power supply, with the neutral wire used to provide stable phase voltage (220V). If the neutral wire is not connected, the meter may detect phase voltage imbalance or abnormal fluctuations, affecting measurement accuracy.

Measurement error: Due to the phase separation measurement method commonly used in three-phase four wire electric meters, if the neutral line is missing, the voltage reference will change, which may result in inaccurate energy measurement or even inability to measure normally.

Equipment malfunction: Some smart meters have self checking function. When the neutral wire is missing, it may enter an error state, causing it to malfunction and even display "phase loss" or "abnormal voltage" alarm messages.

Electrical damage risk: If the load is unbalanced, the voltage of certain phases may rise, causing electrical equipment to burn out, especially single-phase equipment (such as lighting, appliances, etc.) may be damaged due to high voltage.

Potential safety hazards: Missing neutral wires may cause voltage drift in the power grid, increasing the risk of electric shock, especially in cases of unbalanced loads, which may result in some equipment casings being charged.

terms of settlement:

Check if the neutral wire is connected correctly and ensure good contact to avoid looseness or disconnection.

Measure the phase voltage and line voltage with a multimeter to determine if there is a zero wire disconnection issue.

If it is a problem with the power supply system, the power department should be contacted for inspection and maintenance.

If further confirmation is needed, you can check the fault code or display information of the electricity meter to understand the specific abnormal situation.