Residual current action protector zero line leakage simple elimination method - Database & Sql Blog Articles

LC03-3.3 SOP8 TVS Static Protection 3.3V

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

Zero line leakage is the main cause when the residual current action protector is frequently tripped and not locked. When a color TV, refrigerator, or large-capacity household appliance starts or stops, the protector will frequently trip once the neutral line leaks. If the electrical load is relatively stable, the protector does not trip or the number of trips is small. Under normal circumstances, the protector trips without locking.

When a zero line leakage occurs in the protection area of ​​a protector, the power equipment of 300 watts or more can be used to connect to a user at the end of each branch line, and the test is started. If the protector trips when testing at the end of a branch, the fault point is on this branch and can be checked on the door. When it is found that the power-on protector does not trip, the fault point is in the previous household that has been checked. Conversely, the starter protector at the end of a branch does not trip, indicating that the fault point is not on this branch line. It is worth noting that the protector protects the three-phase four-wire power supply load. If the three-phase load is unbalanced, the protector will trip whether it is tested above or below the fault point. When this phenomenon occurs, you can use the top-down or bottom-up method to test, and try to close a household knife. When the door breaker protector is turned off and the trip is not tripped, the fault point is in this household. This method of inspection is simple and fast. It is not necessary to go to the pole or take other measures. Generally, the fault point can be detected in a short time.