Leakage protection plug

Overview

When this part of the current flows into the earth through the human body, it will cause an electric shock. The function of the "leakage protection plug" is to automatically cut off the power supply before the leakage current reaches the amount of current that hurts the human body when the electrical appliance connected to the plug has a leakage, so as to protect personal safety.

Working principle

The leakage protection plug is to detect the "residual current" in the "ground wire" loop. Its working principle is to pass the two power cords (live wire and neutral wire) of the plug into the center hole of a special "zero-sequence current transformer" at the same time. When the electrical appliances are in normal use, the current flowing in the live wire and the neutral wire is exactly the same. Yes, once the current enters and the other exits, the secondary coil of the current transformer has no voltage output. When there is "residual current" in the "ground loop" (including the earth loop), the two power lines penetrating into the transformer are unbalanced, and a voltage signal proportional to the current will be generated at the output of the "current transformer" , As long as the voltage signal is large enough, after the voltage signal is amplified by the integrated circuit of the dedicated circuit board, the thyristor on the trigger board is changed from cut-off to on, so that the trip coil connected in series in the loop is energized, so that The main circuit tripping device is disconnected to protect the personal safety of persons who may come into contact with the power supply.

Application range

leakage protection plugs are widely used in electric heating tables, storage water heaters, hair dryers, electric clips, electric scissors, vacuum cleaners, electric bathtubs, electric water heaters, Leakage protection for terminal electrical appliances such as rice cookers, televisions, refrigerators, microwave ovens, washing machines, dishwashers, disinfection cabinets, drinking fountains, computers, electric tools and medical equipment, instruments and meters.

Features

The leakage protection plug is compact, convenient, and has a wide voltage (100-240V). It can be used in different countries and different places of use (voltage and leakage action current are different). Use corresponding plugs, wires, etc. according to customer needs, with excellent materials (more durable) and other characteristics.