CN201215851Y

CN201215851Y - Full functional safe plug

Info

Publication number: CN201215851Y
Application number: CNU2008200867666U
Authority: CN
Inventors: 钱加灿
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-05
Filing date: 2008-05-05
Publication date: 2009-04-01
Anticipated expiration: 2018-05-05

Abstract

The utility model relates to an all-purpose safety plug, which comprises three poles of a phase pole, a zero pole and an earth pole, a zero-sequence current mutual inductor, a test loop, an amplifying circuit, a direct current power supply, a thyristor and a release which are arranged between the phase pole and the zero pole, wherein a ground wire is connected with a static contact through a movable contact cushion disk, the zero-sequence current mutual inductor is threaded through the ground wire, the output ends of the zero-sequence current mutual inductor in the ground wire are connected with an electric capacitance and an electric resistance in parallel, one output end of a ground wire mutual inductor is connected with a trigger electrode of the other thyristor, the other output end of the ground wire mutual inductor is connected with a negative pole of the rectification circuit, and the positive pole and the negative pole of the thyristor are connected with the positive pole and the negative pole of the rectification circuit. The utility model has the advantages that even under the condition that the thyristor or the amplifying circuit on the phase pole and the zero pole are invalid and when the ground wire is charged accidentally, the power supply still can be disconnected immediately through the other thyristor, thereby the safety plug can stably and reliably prevent the ground wire from electrification and can guarantee the personal safety of users. The zero-sequence current mutual inductor of a phase wire and a zero wire and the zero-sequence current mutual inductor of the ground wire can not interfere mutually, the reliability is good, and the cost is saved furthermore.

Description

Omnipotence safety plug

Technical field

The utility model relates to a kind of attaching plug, particularly relates to the omnipotence safety plug of a kind of energy fire line, zero line, ground wire electrification.

Background technology

Disclosed a kind of all-purpose leakage protection plug among the Chinese patent literature CN1142618C; in the power line ground wire, be provided with the ground wire electrified detection inductor; in phase; be provided with zero sequence current mutual inductor between the zero line; and plug inside phase; zero; be equipped with a pair of contact between ground wire and the breaker; be connected to spring between breaker upper end and the ground wire moving contact copper reed; make a pair of contact of ground wire have a spring force of inhaling mutually all the time; when moving, realizes by the trip free device connecting earlier ground wire; phase is connected in the back; the zero line or the first phase failure; zero line; the disconnected ground wire in back; thereby satisfy the safety utilization of electric power requirement; but there is following shortcoming: 1; phase; when the zero-sequence mutual inductance coil of zero line breaks down; for example break etc.; the zero-sequence mutual inductance coil of ground wire just can not work, the purpose that can in time cut off in the time of therefore also can't reaching ground wire electrification.2, owing to be through between zero-sequence mutual inductance coil on zero-sequence mutual inductance coil on the ground wire and phase line, the zero line and insert same amplifier input terminal; influenced the output voltage of the zero-sequence mutual inductance coil on the ground wire; thereby influence the operating current of ground wire; operating current when making the ground wire electric leakage has surpassed the safe current that human body bears; therefore can not play a protective role, still entail dangers to people's life security.3, the zero-sequence mutual inductance coil temperature influence on the ground wire is bigger in this circuit, and its operating current can vary with temperature and acute variation, therefore can't adapt to different environments for use.

The safety plug of disclosed a kind of defense sector tape electricity among the Chinese patent literature CN2609228 Y that I apply for, it adopts different tripping mechanisms and the mechanism that prevents overtemperature with the aforementioned patent document, though improved fail safe, but since its ground wire with mutually, the zero sequence tripping coil of zero line still uses same amplifier, therefore also have the shortcoming similar to above-mentioned patent, fail safe is not high enough.

The disclosed omnipotence safety plug of Chinese patent literature CN101017947 A of my application, the secondary output end of the zero sequence current mutual inductor in its ground wire and another amplifying circuit are connected in parallel, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of another amplifying circuit, link to each other with the silicon controlled trigger electrode behind diode of output serial connection of former amplifying circuit, though can guarantee working alone between two zero-sequence mutual inductance coils like this, but still can not thoroughly overcome influencing each other between two amplifying circuits, the phenomenon that wrong diagnosis is opened occurs, adopt two cover amplifying circuits also to increase cost in addition.

The utility model content

Technical problem to be solved in the utility model is to provide omnipotence safety plug at the defective of above-mentioned prior art, can economical, the rapid purpose that disconnects when reaching ground wire electrification reliable and stablely.

The utility model solves the problems of the technologies described above the technical scheme that is adopted:

Omnipotence safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, amplifying circuit, DC power supply, controllable silicon, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the output shunt capacitance of the zero sequence current mutual inductor in the described ground wire, resistance, the ground wire instrument transformer is exported an end and is connected with another controllable silicon trigger electrode, the ground wire instrument transformer output other end is connected with the rectification circuit negative pole, and the silicon controlled both positive and negative polarity is connected with the both positive and negative polarity of rectification circuit.

The utility model has made full use of rectifier power source and release in original phase, the zero line protection plug; adopt the principle of the coil-induced electricity of zero-sequence mutual inductance; in ground wire, add the zero-sequence mutual inductance coil; and ground wire zero sequence coil trigger control circuit is set; with disengagement and the close mechanism of the release in original phase, the zero line control as ground wire; whether have or not the residual current except that detecting between load phase, the zero line, also detecting ground wire has charged residual current.When phase, zero line or ground wire have residual current respectively or simultaneously, two zero-sequence mutual inductance coils produce induced voltage respectively or simultaneously and trigger the amplifying circuit or the ground wire zero sequence coil trigger control circuit of phase, zero line, being about to phase, zero line and ground wire thirty years of age all disconnects, promptly cut off the electricity supply, thereby ensured personal safety effectively.

Compared with prior art, advantage of the present utility model is:

By another controllable silicon, even under the controllable silicon or amplifying circuit failure conditions of phase, zero line, it is unexpected when charged ground wire to occur, still can be immediately dump, thus can reliablely and stablely prevent ground wire electrification, guarantee user's personal safety.And, do not disturb good reliability mutually between the zero-sequence transformer of phase, zero line and the zero-sequence transformer of ground wire.

Owing to, therefore can save cost only with two controllable silicons.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1 is the circuit diagram of omnipotence safety plug, it comprises by movable contact flexure strip and fixed contact connecting band K switch 1, K2, the phase of K3, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor LLH1 between the zero line, the test loop that resistance R 2 and button SW form, amplifying circuit IC, DC power supply D1-D4, release ZR, be installed with zero sequence current mutual inductor LLH2 in the ground wire, described ground wire instrument transformer LLH2 output shunt capacitance C1 and resistance R 3, ground wire instrument transformer LLH2 exports an end and is connected with controllable silicon SCR 2 trigger electrodes, the ground wire instrument transformer LLH2 output other end is connected with rectification circuit D1-D4 negative pole, and the both positive and negative polarity of controllable silicon SCR 2 is connected with the both positive and negative polarity of rectification circuit D1-D4.

When local tape electricity causes ground wire to produce residual current; the induced voltage that ground wire instrument transformer LLH2 output produces reaches controllable silicon SCR 2 trigger electrode trigger voltages, makes its triggering and conducting, thereby drives leakage protecting plug tripping coil dropout tripping operation; cut off the electricity supply, guarantee safety.

The effect of above-mentioned capacitor C 1 is to improve the product antijamming capability, and the stability of product is effectively ensured.

Above-mentioned resistance R 3 is for regulating resistance, and its effect is to regulate ground wire residual operating current size.

In order to prevent that moment reverse high voltage from entering controllable silicon SCR 2 trigger electrodes and damaging controllable silicon 2, output parallel diode D5 at above-mentioned zero sequence current mutual inductor LLH2, the negative pole of diode D5 is connected with controllable silicon SCR 2 trigger electrodes, the positive pole of diode D5 is connected with the negative pole of controllable silicon SCR 2, and circuit diagram is seen Fig. 1.

The mechanical part of tripping mechanism has a kind of open in detail in Chinese patent ZL032297467, and tripping mechanism can also adopt other mechanisms.

Because triggering the dropout principle has been known, therefore be not described in detail in this.

Claims

1, omnipotence safety plug, the phase that comprises belt switch, zero, ground three utmost points, be located at phase, zero sequence current mutual inductor between the zero line, the test loop, amplifying circuit, DC power supply, controllable silicon, release, ground wire is connected with fixed contact by the movable contact flexure strip, be installed with zero sequence current mutual inductor in the ground wire, it is characterized in that: the output shunt capacitance of the zero sequence current mutual inductor in the described ground wire, resistance, the ground wire instrument transformer is exported an end and is connected with another controllable silicon trigger electrode, the ground wire instrument transformer output other end is connected with the rectification circuit negative pole, and the silicon controlled both positive and negative polarity is connected with the both positive and negative polarity of rectification circuit.

2, omnipotence safety plug as claimed in claim 1 is characterized in that: the output parallel diode of the zero sequence current mutual inductor in the described ground wire, and the negative pole of diode is connected with another controllable silicon trigger electrode, and the positive pole of diode is connected with the silicon controlled negative pole.