Capacitor step-down energy-saving zero-break protection and grounding universal self-test plug socket

Abstract

The present invention has a capacitor step-down energy-saving type zero-off protection and grounding universal self-test plug socket. The zero-off protection is a single-phase three-pole plug or a single-phase three-pole socket. A capacitor is connected across the zero line and the ground line. Control, when the neutral line of the external power supply line is disconnected or connected to the live line, when the current on the capacitor connected between the neutral line and the ground rises to a certain value, the user leakage protector will trip immediately, effectively protecting The user's electrical equipment is protected from damage. The grounding universal self-test plug socket is installed on a single-phase three-pole plug or a single-phase three-pole socket with a zero protection selection switch, a safety self-test indicator light and a test button. If the indicator light SD2 Lighting at the same time as the indicator light SD3 shows that the position of the live wire L1 is correct, otherwise there is a wiring error to be used after troubleshooting. The present invention has the advantages of simple circuit, low cost and convenient operation, which is very practical.

Description

technical field [0001] The invention relates to the field of safe power supply, safe power use, grounding detection and zero-off protection of low-voltage power supply systems, in particular to a capacitor step-down energy-saving type zero-off protection and grounding universal self-test plug socket. Background technique [0002] There is zero disconnection in the power supply system, especially the sudden disconnection of the zero line of the three-phase four-wire power supply in residential areas. When the load of the three-phase live wire is seriously unbalanced, the voltage of some households will suddenly rise to more than 250V or even reach about 400V, or If the zero line breaks on a certain phase line of fire, a large number of household appliances will be burned. Once a similar accident occurs, there is no effective protection measure; at present, a large number of single-phase three-pole plug sockets are used in urban and rural residences or industrial and mining ent...

AI Technical Summary

Problems solved by technology

[0002] There is zero disconnection in the power supply system, especially the sudden disconnection of the zero line of the three-phase four-wire power supply in residential areas. When the load of the three-phase live wire is seriously unbalanced, the voltage of some households will suddenly rise to more than 250V or even reach about 400V, or If the zero line breaks on a certain phase line of fire, a large number of household appliances will be burned. Once a similar accident occurs, there is no effective protection measure; at present, a large number of single-phase three-pole plug sockets are used in urban and rural residences or industrial and mining enterprises. , Some families or enterprises have low safety awareness, house decoration and new equipment installation are not grounded or the ground wire does not meet the safety requirements, which will eventually lead to personal injury and death. How to find and detect the safety hazards of electrical equipment is currently lacking in simplicity effective means and methods

For example, the simplest 220-volt single-phase three-pole socket, because the existing socket is an electric shock-proof socket with small gaps and baffles, it is difficult to insert the test pencil or the needle of the multimeter, and it is impossible to visually confirm the existence of the ground wire. , there is an urgent need for a simple grounding universal self-test plug socket to judge the safety of electrical equipment and the reliability of the grounding system, so as to eliminate potential safety hazards and prevent accidents.

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