Why does a multimeter only show 107V when measuring 220V?
In this situation, the power should be cut off and the cause should be investigated in detail. Can it be tested at someone else's house elsewhere to see if it's normal. Normally, it should be around 200 volts to 240 volts. During the peak season of summer irrigation in rural areas, the voltage can drop to around 160 volts. This is due to the power supply system. If it is normal in other places, but not in a single home or on one of the roads, it is a fault that should be resolved before supplying power. Electrical accidents caused by fire damage. Focus on checking for poor contact, electrical faults, and overloading caused by thin electrical wires. It's best to ask an electrician to help eliminate it. To prevent the malfunction from escalating and causing harm to people and objects.
One possibility is that the external line is broken due to the neutral wire. Two, you can use an electric pen to measure the darkness and determine if the internal battery of the 30000 meter is insufficient. Compare it with another 10000 meter!
Is it possible to measure the starting voltage of 220V on the single-phase line A of the same main power supply using the same multimeter, but measure the starting voltage of 107V on the single-phase line B?, Is it true that the voltage measured by the same multimeter at the beginning of the single-phase line A is 220V, while the voltage measured at its end is 107V?
If the same multimeter is used to measure the starting voltage of the single-phase line A of the same main power supply, and the measured starting voltage of the single-phase line B is 220V, and the measured voltage of the single-phase line B is 107V; So the two connection points at the upper and lower ends of the circuit breaker (switch) of the single-phase line should have poor contact due to oxidation, resulting in increased contact resistance and voltage drop.
If the same multimeter is used to measure the starting voltage of the A single-phase line or the B single-phase line of the same power supply, which is 220V, and the measuring end voltage is 107V; So it should be that the line measuring the terminal voltage of 107V is too long or the load current on the line is greater than the safe current carrying capacity of the wire, causing the voltage drop.
If the voltage measured at the beginning of the single-phase lines A and B of the same power supply is 107V; So it should be that the capacity of the distribution transformer in the low-voltage distribution station area is much smaller than the electricity consumption capacity of the user, or the distance between the distribution transformer and the user's distribution line is too long or too small, resulting in a voltage drop.
