CN87202097U

CN87202097U - Safety apparatus for not power cut and using power

Info

Publication number: CN87202097U
Application number: CN 87202097
Authority: CN
Inventors: 吴文龙; 吴小明
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-02-17
Filing date: 1987-02-17
Publication date: 1988-04-13

Abstract

The utility model discloses a safety apparatus for not power cutoff and using power, which has double protecting function that the electric shock protection can be realize under the condition that the power is not cut off, and the not power cutoff protection can be realized under the necessary condition. The safety apparatus for not power cutoff and using power has the capacity that the leakage current of the electric equipment can be automatically eliminated beforehand, and the waste of the electrical energy caused by the leakage current can be eliminated; the error action can not occur, and the normal power utilization can not be affected; The utility model is suitable for the power utilization protection of the single-phase line of the household and the factory.

Description

Safety apparatus for not power cut and using power

The utility model belongs to the single-phase electricity consumption security device that do not have a power failure.

Before the utility model was made, domestic and international various earth leakage protectors all belonged to the power failure safety type, forced to have a power failure after promptly getting an electric shock to reach security personnel's purpose, and this type of earth leakage protector regular meeting influences normal electricity consumption because of misoperation causes the defective of tripping operation outage without reason.

Self-insurance's earth leakage protector of the prior art, often because of misoperation causes outage without reason, can not be as not having a power failure electric shocked guard.

Gram fan of the prior art (KM) formula earth leakage protector (No. the 4th, utility model patent communique the 3rd volume; application number is 85203871); can be after 5 seconds when misoperation reclosing once; can cause damage like this to some power consumption equipment; when the example refrigerator send electricity again in three minutes after sudden power, can make the burn-down of electric motor (see magazine the 8th phase of household electrical appliance in 1986 the 9th page of refrigerator automatic time delay for details and protect a literary composition) in the refrigerator.

The full-automatic electric shock safety equipment of Shanghai comrade Chen Cezhan invention of the prior art, it has the ability of identification shock current and non-shock current, can prevent misoperation, but can not be as not having a power failure electric shocked guard, automatically the leakage current of remover apparatus can not be avoided due to leakage current and causes waste of electric energy.(application for a patent for invention of this technology number be 85100422)

The main points of Electric protector of the present utility model are to have used the anti-phase technology of rapid line on circuit structure, forcing the rapid transition of electric leakage end for the principle of the earth homophase, reach the electric leakage end and get rid of the leakage current of shock current and power consumption equipment with the earth equipotential voluntarily, its circuit groundwork principle is shown in accompanying drawing (1).This protector also possesses the security personnel's that have a power failure dual protection function under special circumstances.

The related Electric protector of the utility model compared with prior art, have at power-off condition not and be issued to the purpose of electric shocked guard, the ability of automatic remover apparatus leakage current is in advance arranged, the purpose of security personnel in advance that acquires a certain degree, can eliminate due to leakage current and cause waste of electric energy, can not take place to have a power failure without reason and influence normal electricity consumption.When this protector did not have a power failure security personnel in implementation, its security personnel's sensitivity was 2 milliamperes * 0.05 second=0.1 milliampere-second, compares with international standard 3 milliampere-seconds, improves 30 times, improves 10 times than China self-insurance's 1 milliampere-second.

The utility model protector is made up of circuit inverter, delay circuit, zero-sequence transformer, electronic switch, driver, main disconnection pass and power supply, and its circuit working principle is as figure (3), shown in the figure (4).

After this protector inserted single phase circuit, the secondary voltage of transformer B was through J ₁Normally closed contact J _1CAnd D ₁To C ₂Charge, simultaneously another road is through R4, J ₂Line bag and D ₂Make J ₂Adhesive, normal opened contact J _2a, J _2bConnect, line voltage is through this contact, and zero-sequence transformer LH's is secondary, J ₁Normally closed contact is delivered to load.If human electric shock's electric current or power consumption equipment Leaked Current of Line to Ground are arranged, will induce electric leakage signal the secondary of zero-sequence transformer LH, this signal is through transistor BG ₂Electronic switch QL is connected, at this moment fully charged C ₂Through QL, J ₁The line bag forms discharging current, J ₁Adhesive rapidly, J _1CNormal opened contact is connected, and electric current is through R ₁, J ₁Line bag and D ₁Make J ₁Keep adhesive, simultaneously BG ₁Base stage is in the positive bias conducting, with C ₂In remaining electric energy release.J ₁Rapidly after the adhesive, J just _1a, J _1bDo once quick anti-phase conversion, forced former electric leakage end and the earth homophase, eliminated the potential difference of electric leakage end and the earth, got rid of leakage current or human electric shock's electric current of equipment automatically, and kept power consumption equipment again and with the normal operation of electric line.

When electric leakage signal occurring once more, in like manner electronic switch is connected, and electric current is through R ₁, QL is to C ₂Charging is simultaneously because BG ₁Conducting, J ₁The a large amount of bypasses of line bag electric current, make J ₁Line bag defluidization and discharging rapidly, this moment J ₁Done once anti-phasely automatically again, another has got rid of leakage current, circulate with this, as long as when leakage current or human electric shock's electric current occurring, and J ₁Will automatic anti-phase conversion once, realize security personnel once automatically.

Under special circumstances, see shown in the figure (2), A, B, C, D each point are represented several electric leakage situations that power consumption equipment may occur among the figure, occur various potential differences over the ground, wherein A represents the full voltage leakage, carry out anti-phase security personnel after, A moves to the position of a, differential earth potential reduces to zero, and leakage current disappears, and reaches security personnel's purpose.Wherein B is the high potential leakage, anti-phase after, B moves to the position of b, differential earth potential is reduced to 40V, enters the safe voltage scope, reaches security personnel's purpose.C is the electronegative potential leakage, has belonged to the safe voltage scope, does not do to reach security personnel's purpose on the contrary.The D point is the zero potential leakage, has belonged to safe range, does not do anti-phasely, reaches security personnel's purpose.Only in B～C point range, J ₁After anti-phase, leakage is still located in this scope, continue to keep leakage current, the electric leakage signal duration greater than R ₃, C ₄Time constant the time, the control utmost point of controllable silicon T is accepted electric leakage signal and conducting, J ₂Promptly discharge J with defluidization _2a, J _2bContact disconnects, and dump is finished and done the security personnel that have a power failure where necessary.Usefulness resets after QA ensures public security for having a power failure among the figure.

Claims

1, a kind of not left alone without help electric Electric protector that uses in the single phase circuit that is applicable to, by the circuit inverter, zero-sequence transformer, electronic switch, delay circuit, driver, the main disconnection closed composition, and principal character of the present utility model is to be connected in series the circuit inverter in supply line, when electronic switch is accepted the electric leakage signal of zero-sequence transformer output, anti-phase by electronic switch driver circuit inverter, realize not left alone without help electric electric shocked guard function, under special electric leakage situation, the electric leakage signal passes through delay circuit, driver, the main disconnection closed realization outage protection function.

2, not left alone without help electric Electric protector according to claim 1 is characterized in that the circuit inverter is made of relay.

3, not left alone without help electric Electric protector according to claim 1 is characterized in that the main pass that disconnects is made of relay.

4, not left alone without help electric Electric protector according to claim 1 is characterized in that the master disconnects the pass and can adopt other electromagnetism action type appliance switches.