Don't jump during the day and at night. Electrical appliances are used at night. Something's wrong.

I say three points for your reference:

1, low voltage trips the leakage protection. At first glance, this is a joke, in fact. Reason: The inductive load of electrical appliances in your home is large (mainly the motor of air conditioner), and the most economical voltage is about 2 10V. Above or below this voltage, the current in the household power supply line will increase, and the greater the deviation, the greater the current. When the voltage drops to 180 volts, the current in the air conditioning circuit will increase a lot. Most people go to work during the day, and the electricity consumption is small, which seems normal. When everyone comes back at night, everyone uses electricity, and the voltage of the bad power grid drops a lot. You can use a multimeter to monitor the voltage changes during the day and at night.

2. Check whether there is a connector in the power supply circuit. If there is a connector, the resistance of the connector will increase after long-term use. Suppose this connector has ohmic resistance, your household electricity consumption is 2200 watts, and the current is 10 ampere. It is not difficult to calculate that the voltage on this connector will drop to 10 volts. The daytime voltage is normal, and the decrease of 10V has no effect. At night, the grid voltage drops. As mentioned in the first point above, the current in the line increases. If it reaches 15Amp, the voltage of this joint will drop by 15V, not to mention the resistance of the joint is not necessarily one ohm, but it may be larger. A vicious circle until you trip.

3. Is there any wire stolen from home? You can find it by careful inspection.