CN208174244U - With ground wire electric fireproof route - Google Patents

Abstract

The utility model relates to a kind of with ground wire electric fireproof route, including：At least one is set to the outside of the matched earth leakage circuit-breaker of distribution wire and for conducting the short circuit current that distribution wire Internal cable occurs to trigger the ground line of the earth leakage circuit-breaker.The utility model proposes it is a kind of with ground wire electric fireproof route, have the advantages of simple structure and easy realization.

Description

With ground wire electric fireproof route

Technical field

It is especially a kind of with ground wire electric fireproof route the utility model relates to electrical applications field.

Background technique

As shown in Figure 1, since French scientist Gao Lande and British scientist John gibbs were invented in 1882 Since the patent of " illumination and power electricity consumption distribute method ", electric use has greatly pushed the progress and development of human society. But allowing two scientists are unexpected to be, their electricity consumption patent is also that the life of the mankind brings great property damage The disaster for mercilessness of becoming estranged.These losses and disaster are exactly electrical fire and accident of human electric shock.Especially with industrialized level Continuous improvement, all trades and professions are to electrical equipment using more and more, and electric disaster hidden-trouble also becomes increasingly conspicuous.Root statistics, A large amount of electrical fire accident can all occur every year for countries in the world, and the electrical fire accident in China has increased to the of the world One, the significantly larger than ratio of countries in the world electrical fire, to country, collective and it is personal all have brought tremendous economic losses and Mental wound.

The patent master of " illumination and power electricity consumption distribute method " of two scientist's inventions of Gao Lande and John's gibbs Solves light distribution mode --- application method and electric distribution mode of namely single-phase firewire --- namely three The application method of phase firewire.They mainly solve the technical issues of low-voltage distribution, and this patented technology is so far also ours It is widely used in life, also provides very big technical support using electric power really for people.But, from a large amount of electrical kindling It can be found that the main problem of electrical fire is caused to be low-voltage distribution in accident, and fire number caused by high voltage power distribution lacks it It is again few.

Electrical fire is mainly as caused by the short trouble between distribution line lead.There are two types of may for conducting wire short circuit Property, first is that this possibility is generally smaller caused by external force Damage to insulation；Second is that caused by the insulation ag(e)ing of conducting wire, it is big absolutely Majority belongs to this form.It is all related with the insulation of conducting wire although two kinds of forms are different, also have with the distance between conducting wire It closes.

High-tension distributing line does not have insulating package, is all made of the form of bare wire.But the distance between conducting wire generally all compares Larger, the probability of direct short-circuit is smaller.So a possibility that causing electrical fire is also smaller.Even if there is short-circuit event Barrier, the relay protection of high-tension line is all equipped with fairly perfect, and protection act is sensitiveer, and actuation time is very short, can rapidly Faulty line is cut off, lasting electrical ignition point would not also occur.Therefore, electrical fire caused by high-tension distributing line is just It is few.

Low-voltage distribution mainly has single phase distribution and three-phase distribution, that is, the light distribution of 220V and the power of 380V are matched Electricity.The general all very littles of the distance between low-voltage distribution wire line conductor, some are even tightly wound together.So low pressure Conducting wire is all outer to be surrounded by insulating layer.But under the action of long-term load, wire external layer insulation will appear aging, even fail Situation.Therefore, the probability for occurring short circuit between primary cable is much greater.In addition the relay protection of low-voltage distribution is often equipped with not It is enough perfect, because low-voltage load changes greatly, it is also difficult to which it is suitable to be equipped with.So the relay protection effect of low-voltage distribution does not have The effect of high voltage power distribution is good.Route is caused to catch fire once short trouble occurs in low pressure wiring, relay protection cannot act immediately to be made Power source trip also cannot be such that ignition point extinguishes at once, but constantly provide energy to short-circuit ignition point, make electrically to catch fire and get over Come it is more serious, until power interruptions.It can be seen that low-voltage distribution is the maximum secret worry of electrical fire.

In the electrical fire occurred in the past, people are to search reason on fire from scene of fire afterwards, it is also difficult to The concrete measure of electric fireproof is provided from technological layer, and is more the organiztion measure for reinforcing electric fireproof from management aspect. But this can not solve the root problem of electric fireproof from source.

In the low-voltage distribution technology in modern age, the work of many property improved is had also been made in electrical researcher.Such as：It will be previous The a variety of short circuits completed by low-voltage comprehensive protective relay, disconnected phase, electricity are changed to by the overload protection that single electrothermal relay is taken on Motivation stall and overload protection etc., expand protection scope；Also it is increased at the power import of different low-voltage distribution modes The technical safety measures such as earth leakage circuit-breaker all play the generation for preventing and reducing electrical fire and accident of human electric shock Positive effect.

Earth leakage circuit-breaker is a kind of very sensitive electric fault control element, and there are three its important technological parameters, electricity Press 50V, electric current 30mA, actuation time 0.1S.In the distribution line for being equipped with earth leakage circuit-breaker, when occur human electric shock or When person's electrical equipment shell leaks electricity, as long as leakage current is more than 30mA, earth leakage circuit-breaker will will leak electricity within the time of 0.1S Protective switch tripping, cuts off the power, and plays relatively good protective effect to the person and electrical equipment.

Nevertheless, annual electrical fire and accident of human electric shock but still happens occasionally.The reason is that working as earth leakage protective When switch controls generation short trouble between internal conducting wire, earth leakage circuit-breaker can't be acted in tripping, that is to say, that leakage Electric protective circuit breaker is not protective effect to failures such as single-phase short circuit, line to line fault and three-phase shortcircuits inside distribution, only It can be protected by other protected modes such as low-voltage comprehensive protective relay.If the action value of low-voltage comprehensive protective relay Adjust improper, it will not be acted in tripping, in this way since, electric short circuit failure is at a kind of state out of control, this is just It is great electric disaster hidden-trouble.

In fact, the setting valve of protection is extremely difficult to suitable level because low-voltage load daytime and at night variation are very big. So after all protections are out of control, once occur electric short circuit failure will certainly cause serious electrical fire accident sprawling, It even will cause the casualty accident of person electric shock.

Can low-voltage distribution be the maximum secret worry of electrical fire, more scientific electric fireproof measure is found from distribution technique , here it is urgent problems in the prior art.

Summary of the invention

The purpose of this utility model is to provide a kind of with ground wire electric fireproof route, existing in the prior art to overcome Defect.

To achieve the above object, the technical solution of the utility model is：A kind of companion's ground wire electric fireproof route, including：Extremely Few one is set to the outside of the matched earth leakage circuit-breaker of distribution wire and for conducting the short of distribution wire Internal cable appearance Road electric current is to trigger the ground line of the earth leakage circuit-breaker.

In an embodiment of the utility model, the distribution wire is single-phase wiring, and the source side of the single-phase wiring is arranged There is monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker；It is described ground line respectively with the monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker source side zero curve N parallel, and bypass the monopole 1P+N or the two poles of the earth 2P（L-N）Leakage The load equipment shell or hanging of the outside access load-side of electric protective circuit breaker.

In an embodiment of the utility model, the cable of the single-phase wiring includes firewire and zero curve, the ground line Outside simultaneously it is tangent with the firewire, zero curve respectively.

In an embodiment of the utility model, the distribution wire is three-phase wiring, and the source side of the three-phase wiring is arranged There are three pole 3P（L1, L2, L3) earth leakage circuit-breaker；The ground line and the three pole 3P（L1, L2, L3) earth leakage protective open The zero curve N parallel of powered-down source, and bypass the three pole 3P（L1, L2, L3) earth leakage circuit-breaker outside access load-side Load equipment shell or hanging.

In an embodiment of the utility model, the cable of the three-phase wiring includes three firewires；The ground line is located at At three-phase distribution cable center, three firewires are located at the ground line side, and the outside of the ground line is simultaneously It is tangent with the outside of three firewires respectively.

In an embodiment of the utility model, the distribution wire is three-phase four-wire system wiring, the three-phase four-wire system wiring Source side be provided with three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker；The ground line and the three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker source side zero curve N parallel, and bypass the three pole 3P+N（L1, L2, L3+N) electric leakage The load equipment shell or hanging of the outside access load-side of protective switch.

In an embodiment of the utility model, the cable of the three-phase four-wire system wiring includes three firewires and one zero Line；The ground line is located at three-phase four-wire system distribution cable center, and three firewires and the zero curve are located at described connect Ground wire side, and the outside of the ground line outside phase with the outside of three firewires and the zero curve respectively simultaneously It cuts.

In an embodiment of the utility model, the ground line is for bare wire or with lamellate insulated conductor.

Compared to the prior art, the utility model has the advantages that：The utility model proposes it is a kind of with ground wire Electric fireproof route, has the advantages of simple structure and easy realization.When any form of short circuit accident occurring inside first wife's line, newly-increased one Bar ground wire can also participate, and so as to cause the leaky of the ground wire, can make earth leakage circuit-breaker movement automatically will be electric immediately Source cutting, thus a possibility that short-circuit ignition point and power supply are disconnected, electrical kindling is substantially reduced.The present invention discarded in the past from The method of the subsequent indirect reference reason of electrical fire, but start with from a variety of low-voltage distribution modes, directly with practical controllable electricity Gas short circuit experiment is means, by analyzing numerous experimental datas, therefrom summarizes and has found effective electric fireproof technical solution And method, and the validity of the electric fireproof technical solution is demonstrated by practice examining, to compensate for Gao Lande and Ji Bu The patent of invention of this two scientists is existing insufficient over more than 100 years, reduces from source, the hair of even elimination electrical fire It is raw, allow electricity to be preferably the social production and family life service of people.

Detailed description of the invention

Fig. 1 is the patent of invention schematic diagram of two scientists of Gao Lande and gibbs in the prior art.

Fig. 2 is existing single phase distribution schematic diagram.

Fig. 3 is single-phase with ground wire in an embodiment of the present invention（Zero curve）Electric fireproof wiring schematic diagram.

Fig. 4 is existing three-phase distribution schematic diagram.

Fig. 5 is three associated ground wire in an embodiment of the present invention（Zero curve）Electric fireproof wiring schematic diagram.

Fig. 6 is existing three-phase four-wire system distribution system schematic diagram.

Fig. 7 is three-phase four-wire system companion ground wire in an embodiment of the present invention（Zero curve）Electric fireproof wiring schematic diagram.

Fig. 8 is single-phase cable schematic layout pattern in an embodiment of the present invention.

Fig. 9 is threephase cable schematic layout pattern in an embodiment of the present invention.

Figure 10 is three-phase four-wire system Cable layout schematic diagram in an embodiment of the present invention.

Figure 11 is companion's ground wire of two hole Kong Gaisan plugs in an embodiment of the present invention（Zero curve）Electric fireproof wiring is shown It is intended to.

【Label declaration】：1- earth leakage circuit-breaker schematic diagram, 2- short dot, L- firewire, N- zero curve, E- ground line.

Specific embodiment

With reference to the accompanying drawing and existing software, the technical solution of the utility model is specifically described.In the explanation Existing software involved in the process is not the object that the utility model is protected, and the utility model only protects the knot of the device Structure and connection relationship.

The utility model provides a kind of companion's ground wire electric fireproof route, including：At least one is set to and distribution lines matching Earth leakage circuit-breaker outside ground line；When generating electric leakage in the route of distribution wire access, with the matched leakage of distribution wire Electric protective circuit breaker acts within a preset time, cuts off the power；When short-circuit between distribution wire Internal cable, short circuit current, which flows through, to be connect Ground wire leaks electricity, and triggers earth leakage circuit-breaker movement, cuts off the power.In the present embodiment, it opens being equipped with earth leakage protective On the basis of single-phase wiring, three-phase wiring and the three-phase four-wire system wiring closed is original, then on the outside of respective earth leakage circuit-breaker Newly establish at least one ground wire（Zero curve）, by the zero curve N parallel with earth leakage circuit-breaker source side, and opened around earth leakage protective The load equipment shell or hanging of the outside access load-side of pass, cooperatively carries out distribution installation with original wiring.

Further, as shown in Fig. 2, single-phase wiring is made of a firewire and a zero curve in the prior art, at it Source side is equipped with monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker, have pair in the outgoing line side of earth leakage circuit-breaker Two outlets of firewire and zero curve answered.As shown in figure 3, in the present embodiment, if distribution wire is single-phase wiring, the electricity of single-phase wiring Source is provided with monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker；Ground line respectively with the monopole 1P+N or The two poles of the earth 2P（L-N）Earth leakage circuit-breaker source side zero curve N parallel, and bypass monopole 1P+N or the two poles of the earth 2P（L-N）Leakage The load equipment shell or hanging of the outside access load-side of electric protective circuit breaker.One is newly established on the outside of earth leakage circuit-breaker Ground wire（Zero curve）, distribution installation is cooperatively carried out with two original wirings, then carries out being connected in parallel for different loads.

Further, in the present embodiment, as shown in figure 8, single-phase cable uses firewire, zero curve, ground wire（Zero curve）Three The layout type of line.Single-phase distribution cable includes firewire and zero curve, the outside of ground line simultaneously respectively with firewire and zero curve Outside is tangent.

Further, it as shown in figure 4, three-phase wiring is made of three firewires in the prior art, is installed in its source side There are three pole 3P（L1, L2, L3) earth leakage circuit-breaker, have corresponding three firewire outlets in the outgoing line side of earth leakage circuit-breaker. In the present embodiment, as shown in figure 5, the source side of three-phase wiring is provided with three pole 3P if distribution wire is three-phase wiring（L1,L2, L3 earth leakage circuit-breaker)；Ground line and the three pole 3P（L1, L2, L3) earth leakage circuit-breaker source side zero curve N simultaneously Connection, and bypass three pole 3P（L1, L2, L3) earth leakage circuit-breaker outside access load-side load equipment shell or hanging. A ground wire is newly established on the outside of from earth leakage circuit-breaker（Zero curve）, distribution installation is cooperatively carried out with three original wirings, Then being connected in parallel for different threephase loads is carried out.

Further, in the present embodiment, as shown in figure 9, threephase cable uses three firewires and ground wire（Zero curve）Four The layout type of line.Three-phase distribution cable includes three firewires；Ground line is located at three-phase distribution cable center, three firewire positions In the ground line side, and the outside being grounded is tangent with the outside of three firewires respectively simultaneously.

Further, as shown in fig. 6, three-phase four-wire system wiring is by three firewires and a zero curve group in the prior art At being equipped with three pole 3P+N in its source side（L1, L2, L3+N) earth leakage circuit-breaker, in the outgoing line side of earth leakage circuit-breaker There are corresponding three firewires and a zero curve outlet.In the present embodiment, as shown in fig. 7, if distribution wire prepares for three-phase and four-line Line, the source side of three-phase four-wire system wiring are provided with three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker；Ground line and institute State three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker source side zero curve N parallel, and bypass three pole 3P+N（L1,L2,L3 + N) earth leakage circuit-breaker outside access load-side load equipment shell or hanging.It is newly-increased on the outside of from earth leakage circuit-breaker If a ground wire（Zero curve）, cooperatively carry out distribution installation with the wiring of original three firewires and a zero curve, then into The different three-phase four-wire system loads of row are connected in parallel.

Further, in the present embodiment, as shown in Figure 10, three-phase four-wire system cable should use three firewires and zero curve with And ground wire（Zero curve）The layout type of five lines.Three-phase four-wire system distribution cable includes three firewires and a zero curve；Ground connection Line is located at three-phase four-wire system distribution cable center, and three firewires and zero curve are located at ground line side, and the outside being grounded It is tangent with the outside in the outside of three firewires and zero curve respectively simultaneously.

Further, in the present embodiment, the ground line newly established is bare wire or with lamellate insulated conductor, just It is exposed in being easy conducting wire.

Further, in the present embodiment, preferably, accompanying a piece-root grafting ground wire for every firewire, cost is being reduced In the case of, at least to accompany a piece-root grafting ground wire.

For the method for allowing those skilled in the art to further appreciate that the utility model is proposed, lower mask body combines control Method is illustrated.

If person electric shock occurs on the matched firewire of three of the above low-voltage distribution mode or passes through electrical equipment shell Leaky, the earth leakage circuit-breaker of its own can be unlikely by dump within 0.1S immediately by power switch tripping In making short dot cause fire, the safety of the person can be also protected to the maximum extent.If led what its earth leakage circuit-breaker was controlled Short trouble has occurred between line inside, originally the earth leakage circuit-breaker can't act immediately, and short-circuit ignition point can will be new The ground wire added is lighted together, and short circuit event occurs together with the conducting wire that the ground wire newly established will be controlled with the earth leakage circuit-breaker Barrier.At this moment, it reveals from the ground wire newly established with regard to some short circuit current, so that the earth leakage circuit-breaker be forced to be jumped immediately Lock completely cuts through power supply.The power-off time of this power-off time protection more any than other will be fast, will be resolute, accurate.When Without the supply of power supply energy, catch fire also will rapidly extinguish short dot, also just achieve the purpose that initial fire extinguishing.This is just It is with ground wire（Zero curve）The core feature of the role of electric fireproof route and the utility model.It can be seen that using this Companion's ground wire of utility model（Zero curve）After electric fireproof route, no matter what form low-voltage distribution is, no matter what also occurs The short circuit accident of form, earth leakage circuit-breaker can prevent electricity quickly and accurately by the dump of fault point from source The generation of gas fire incident, a possibility that substantially reducing electrical kindling.

Further, in the present embodiment, the plug of the distribution form of three lines can be configured in corresponding power supply line With socket.

It is the preferred embodiment of the utility model above, it is all to change according to made by technical solutions of the utility model, it is produced Function without departing from technical solutions of the utility model range when, belong to the protection scope of the utility model.

Claims (8)

1. a kind of with ground wire electric fireproof route, which is characterized in that including：At least one is set to and the matched electric leakage of distribution wire The outside of protective switch and for conduct distribution wire Internal cable appearance short circuit current to trigger the earth leakage circuit-breaker Ground line.

2. according to claim 1 a kind of with ground wire electric fireproof route, which is characterized in that the distribution wire is single-phase matches Line, the source side of the single-phase wiring are provided with monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker；The ground line With the monopole 1P+N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker source side zero curve N parallel, and bypass the monopole 1P + N or the two poles of the earth 2P（L-N）Earth leakage circuit-breaker outside access load-side load equipment shell or hanging.

3. according to claim 2 a kind of with ground wire electric fireproof route, which is characterized in that the cable of the single-phase wiring Including firewire and zero curve, the outside of the ground line is tangent with the firewire, zero curve respectively simultaneously.

4. according to claim 1 a kind of with ground wire electric fireproof route, which is characterized in that the distribution wire is three matchings Line, the source side of the three-phase wiring are provided with three pole 3P（L1, L2, L3) earth leakage circuit-breaker；It is described ground line with it is described Three pole 3P（L1, L2, L3) earth leakage circuit-breaker source side zero curve N parallel, and bypass the three pole 3P（L1, L2, L3) The load equipment shell or hanging of the outside access load-side of earth leakage circuit-breaker.

5. according to claim 4 a kind of with ground wire electric fireproof route, which is characterized in that the cable of the three-phase wiring Including three firewires；The ground line is located at three-phase distribution cable center, and three firewires are located at the ground line Side, and the outside of the ground line is tangent with the outside of three firewires respectively simultaneously.

6. according to claim 1 a kind of with ground wire electric fireproof route, which is characterized in that the distribution wire is three-phase four Line prepares line, and the source side of the three-phase four-wire system wiring is provided with three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker； The ground line and the three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker source side zero curve N parallel, and bypass institute State three pole 3P+N（L1, L2, L3+N) earth leakage circuit-breaker outside access load-side load equipment shell or hanging.

7. according to claim 6 a kind of with ground wire electric fireproof route, which is characterized in that the three-phase four-wire system wiring Cable include three firewires and a zero curve；The ground line is located at three-phase four-wire system distribution cable center, and described three Root firewire and the zero curve are located at the ground line side, and the outside of the ground line simultaneously respectively with three firewires Outside and the zero curve outside it is tangent.

8. described in any item a kind of with ground wire electric fireproof route according to claim 1 ~ 7, which is characterized in that the ground line For bare wire or with lamellate insulated conductor.