China Supplier of Power Plug with Leakage Protection

“Leakage protection power plug” is also called “residual current protection plug”. When an electrical appliance leaks electricity, in the electrical circuit, there must be a part of the current that does not flow back to the transformer from the live wire through the neutral wire. Instead, it flows into the ground through the “conductor” such as the ground wire or the human body, forming a “tributary” other than the main circuit, which is what we usually call “leakage”.

Foreign trade leakage protection plug

The function of the power plug for leakage protection
Detection of residual current in ground loops

16A European leakage protection plug

How to use the power plug with leakage protection
When this part of the current flows into the earth through the human body, it will cause electric shock. The function of the “leakage protection plug” is to automatically cut off the power supply when the electrical appliance connected to the plug leaks electricity before the leakage current reaches the current amount that can harm the human body, so as to protect personal safety.

American standard leakage protection plug

The working principle of the leakage protection power plug
The leakage protection plug is to detect the “residual current” in the “ground wire” loop. Its working principle is to pass the two power wires (live wire and neutral wire) of the plug into a special “zero-sequence current transformer” center hole at the same time. When the electrical appliance is in normal use, the current flowing in the live wire and the neutral wire is completely equal, and the current flows in and out, and the secondary coil of the current transformer has no voltage output. When there is a “residual current” in the “ground loop” (including the earth loop), the current of the two power lines passing through the transformer is unbalanced. A voltage signal proportional to the current is 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 will be turned from off to on. Energize the tripping coil connected in series in this circuit, so as to disconnect the tripping device of the main circuit and protect the personal safety that may be in contact with the power supply.

Leakage protection plug

The scope of application of the leakage protection power plug
Leakage protection plugs are widely used in electric heating tables, storage water heaters, hair dryers, electric clips, electric clippers, vacuum cleaners, electric bathtubs, electric water heaters, rice cookers, televisions, refrigerators, microwave ovens, washing machines, dishwashers, Leakage protection of disinfection cabinets, water dispensers, computers, electric tools, medical equipment, instruments and other terminal electrical appliances.

Features of leakage protection power plug
The leakage protection plug is small, convenient, and has a wide voltage (100-240V), which can be applied to different countries and different places of use (voltage and leakage current are different). Corresponding plugs, wires, etc. can be used according to customer needs, and the material is excellent (more durable).

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