The indicator light of the earth leakage protection plug needs to be turned on all the time, when the indicator light is on the earth leakage protection plug is only in working condition, if it needs to work, it should be turned on all the time.
The earth leakage protection plug is to detect the "residual current" in the "ground" circuit. The principle of operation is to plug the two power lines (firewire and wire) at the same time through a special "zero sequence current transformer" in the center hole, when the normal electrical appliances, the firewire and the middle line of the current flowing through the line is completely equal, the current in and out of the secondary coil of the current transformer no voltage output.
When there is a "residual current" in the "ground loop" (including the earth loop), the current in the two power lines going into the transformer is unbalanced, and the output of the current transformer will generate a current proportional to the current. The output of the "current transformer" will produce a voltage signal proportional to the current, as long as the voltage signal is large enough, the voltage signal by the special circuit board of the integrated circuit amplification and other processing, the trigger board on the thyristor from the cut-off to conduction, so that the series in the circuit tripping coil is energized, so as to make the main circuit disconnecting the device, to protect the power supply may be in contact with the safety of the person.
Expanded information
Leakage protection plug is widely used in electric ambient table, water storage water heater, electric hair dryer, electric clip, electric clippers, vacuum cleaner, electric bathtub, electric kettle, electric rice cooker, television, refrigerator, microwave ovens, washing machines, dishwashers, sterilizers, water dispensers, computers, power tools and medical equipment, instruments and meters. Leakage protection for terminal electrical appliances.
Leakage protection plug has a small, convenient, wide voltage (100-240V), can be applied to different countries and different places of use (voltage, leakage action current is different), according to customer needs to use the corresponding plug, wire, etc., excellent material (more durable) and other characteristics.