The causes of circuit breaker tripping include overload, short circuit, leakage, undervoltage or overvoltage.
If the current in the line exceeds the range that the circuit breaker can withstand, for example, the bearing range is 20 A, but the actual current is 21 A, the circuit breaker will trip. The reason for circuit overload is that the total power of electrical appliances used at the same time is too large, so it is necessary to remove some high-power electrical appliances or reduce the number of electrical appliances used, and then close the gate valve.
This is an extreme phenomenon, which means that the zero line and the belt line directly contact with each other without passing through the electrical appliances, which will produce very large current. This current will burn the electrical appliances and may even cause electric shock. If this happens, the circuit breaker shall remain open until the fault is eliminated. If the plug in the appliance burns black or sparks, it will still trip after all plugs are pulled out, which means there is a short circuit in the circuit.
If the line or electric appliance leaks, it will also trip. To judge this situation, you can observe the status of the attachment. Attachments usually have a reset button with annotation text next to it. Normally, this button is on the same plane as the circuit breaker housing. If this button protrudes, it indicates that there is a leak in the circuit. You need to press the reset button before closing the door.
If the voltage is insufficient or too high, it will trip. In this case, before closing the brake, it is necessary to adjust the voltage until the voltage is stable.