CN103441466B - A kind of Automatic phase-failure zero-failure power-off protection - Google Patents
A kind of Automatic phase-failure zero-failure power-off protection Download PDFInfo
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- CN103441466B CN103441466B CN201310359500.XA CN201310359500A CN103441466B CN 103441466 B CN103441466 B CN 103441466B CN 201310359500 A CN201310359500 A CN 201310359500A CN 103441466 B CN103441466 B CN 103441466B
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Abstract
The invention provides a kind of Automatic phase-failure zero-failure power-off protection, mainly comprise an automatic shunt circuit breaker and some control relays.Two switching circuits adopting the contact combination of two control relays to form provide two current supply circuits for shunt opening coil; When lacking zero without phase shortage, two switching circuits are off-state, and shunt opening coil passes through without electricity, normal power supply; When there is phase shortage and lacking zero, in two switching circuits one by conducting, shunt opening coil obtains electric, automatic shunt circuit breaker tripping operation power-off protection; When distribution box housing is charged, control relay three obtains electric, and its normally-closed contact disconnects, and makes normally-closed contact place loop open circuit, and action effect is equal to generation phase shortage and lacks zero situation, and shunt opening coil obtains electric, automatic shunt circuit breaker tripping operation power-off protection.Have structure simple, use that parts are few, reliability is high, low cost and other advantages.
Description
Technical field
The present invention relates to a kind of circuit protection device, the Automatic phase-failure zero-failure power-off protection particularly in a kind of three-phase and four-line supply line.
Background technology
In low-voltage distribution three-phase and four-line circuit, long-term existence, because of power supply unit circuit breaking (phase shortage, the scarce zero) potential safety hazard that fault produces, causes electric equipment, consuming device to damage; Zero line iterative earthing is generally taked in low-voltage distribution three-phase four-wire system, consumer unit, distribution box all will establish earth polar on the spot, object guarantees to be kept once neutral line break by earth electrode on the spot, this practice long-term existence potential safety hazard, once earth electrode continuity is bad while of neutral line break, when even ground connection is broken already, following potential safety hazard will be produced: some single-phase 220V loop can become 380V, cause electric equipment, utensil burns out at short notice; Three-phase power 380V loop declines due to Voltage unbalance motor power (output), produces high temperature at short notice and burns out.
Some type products such as existing disconnected phase and phase sequence protection relay (XJ3, XJ3-G, XJ5) can play automatic trip power-off protection (it utilizes A.C. contactor decompression to trip or automatic circuit breaker band decompression tripgear) to power phase shortage; lack zero line to power supply not protect; simultaneously due to once generally there is no automatic switching-on device after contactor or circuit breaker trip; manually to arrive execute-in-place, not meet the continuous power reguirements of reliability.Current low-voltage network circuit three-phase four-wire system (consumer unit, distribution box) does not possess phase shortage and lacks zero auto-breaking defencive function, and its technology is blank at present.
Summary of the invention
In order to make up the deficiencies in the prior art; the technical problem to be solved in the present invention is to provide a kind of Automatic phase-failure zero-failure power-off protection; namely in low-voltage network three-phase four-wire system; phase line A, B, C appoint a scarce phase or scarce zero line N; or distribution box housing charged time; circuit breaker trips power-off immediately, thus avoids electric equipment damage and prevent electric shock accidents.The technical characterstic of device: line outage is not tripped, circuit telegram in reply do not trip, circuit phase shortage, lack zero time trip immediately, now will until line fault get rid of after normal power supply time manually arrive execute-in-place, automatic circuit breaker is closed a floodgate.
In order to realize foregoing invention object, the present invention proposes a kind of Automatic phase-failure zero-failure power-off protection, it is characterized in that: comprise automatic shunt circuit breaker, control relay one, control relay two; Automatic shunt circuit breaker access three-phase and four-line supply line, control relay one accesses between any two phase lines of automatic shunt circuit breaker leading-out terminal, and control relay two accesses automatic shunt circuit breaker leading-out terminal and remains one between phase line and zero line; The grouping circuits that the contact that the shunt opening coil access control relay one of automatic shunt circuit breaker and control relay two provide is formed, that to form two be HW highway with the shunt opening coil of automatic shunt circuit breaker, in parallel with control relay one and control relay two respectively contact switch circuit is shunt opening coil power supply;
The contact arrangement principle of described contact switch circuit is: one of them control relay provides two normally opened contacts and two normally-closed contacts, and another control relay provides a normally opened contact and a normally-closed contact; The both sides of two normally opened contact series connection access shunt opening coils of described last control relay, form with this control relay in parallel switching circuit after connecting with the normally-closed contact that another control relay provides; The both sides of two normally-closed contact series connection access shunt opening coils of described last control relay, form with another control relay in parallel switching circuit after connecting with the normally opened contact that another control relay provides;
When normal power supply, two contact switch circuits are off-state, and shunt opening coil passes through without electricity; When generation phase shortage of powering lacks zero or housing is charged, wherein a contact switch circuit is by conducting, and shunt opening coil obtains electric, automatic shunt circuit breaker tripping operation power-off protection.
Further, the present invention also comprises control relay three, control relay three and fuse connect after one end be connected with described Automatic phase-failure zero-failure power-off protection casing, the other end is connected with zero line; The normally-closed contact of control relay three is connected with control relay one or control relay two.
Further, the concrete annexation of contact switch circuit of the present invention comprises following two kinds:
1) control relay one provides two normally opened contacts and two normally-closed contacts, and control relay two provides a normally opened contact and a normally-closed contact; Two normally opened contacts of control relay one are connected on shunt opening coil both sides, and the switching circuit that the normally-closed contact of control relay two of connecting again in this series circuit is formed is in parallel with control relay one; Two normally-closed contacts of control relay one are connected on shunt opening coil both sides, and the switching circuit that the normally opened contact of control relay two of connecting again in this series circuit is formed is in parallel with control relay two;
2) control relay two provides two normally opened contacts and two normally-closed contacts, and control relay one provides a normally opened contact and a normally-closed contact; Two normally opened contacts of control relay two are connected on shunt opening coil both sides, and the switching circuit that the normally-closed contact of control relay one of connecting again in this series circuit is formed is in parallel with control relay two; Two normally-closed contacts of control relay two are connected on shunt opening coil both sides, and the switching circuit that the normally opened contact of control relay one of connecting again in this series circuit is formed is in parallel with control relay one.
Further, the present invention also comprises three fuses and three indicator lights; The every bar phase line in automatic shunt circuit breaker end of incoming cables and access fuse, an indicator light and the relay normally-closed contact of all connecting between zero line; Described normally-closed contact is provided by any one or the other relay arranged in control relay one, control relay two.
Further, the above-mentioned automatic shunt circuit breaker leading-out terminal of the present invention any connect between phase line with zero line access fuse and an indicator light.
Further, the present invention also comprises four circuit breakers; Respectively connect after a circuit breaker and access between described two phase lines again in control relay one two ends; Respectively connect after a circuit breaker and access again between described phase line and zero line in control relay two two ends.
In the present invention, key technology is the characteristic that the shunt opening coil that make use of automatic shunt circuit breaker can adapt to two kinds of voltages the short time and normally works, two switching circuits (circuit X-Y, circuit L-M) adopting the contact combination of two control relays to form provide two operating voltages (220V, 380V) for shunt opening coil; When power supply is normal, two switching circuits are off-state, and shunt opening coil is failure to actuate; In powered operation process, once power phase shortage or to lack in zero, two switching circuits one by conducting, shunt opening coil energized action, automatic shunt circuit breaker tripping operation power-off protection; When consumer unit (distribution box) housing electrified voltage equals higher than AC36V; control relay three energized action; its normally-closed contact disconnects; make loop, normally-closed contact place (control relay primary Ioops or control relay secondary circuit) open circuit; action effect is equal to phase shortage and lacks zero situation; shunt opening coil energized action, automatic shunt circuit breaker tripping operation power-off protection.
Three phase shortage indicating circuits of fuse A, B, C and indicator light A, B, C and normally-closed contact formation, exist in phase shortage or charged situation, should partly or entirely light, this phase phase shortage is represented when certain lamp does not work, once circuit breaker automatic trip, A, B, C3 lamp represents when all lighting that power supply is normal, belongs to consumer unit, distribution box housing Issues on Static Electrification.
The powered operation indicating circuit that fuse R and indicator light R are formed, when normal power supply, indicator light R lights, and represents that power supply is normal, power supply phase shortage or casing charged time, extinguish, represent abnormal electrical power supply.
Four miniature circuit breakers can the connection of complete disconnecting members and supply line when device keeps in repair; convenient and safe operation; meanwhile, can be used for protective device reliability test, whether reliably working to be installed after this device under phase shortage lacks zero or the charged situation of housing by inspection consumer unit, distribution box.
In sum; beneficial effect of the present invention is the Automatic phase-failure zero-failure power-off protection of employing automatic shunt circuit breaker and three control relay formation main circuits, has the advantages such as circuit structure is simple, use parts are few, reliability is high, with low cost.
Accompanying drawing explanation
Fig. 1 is the line map of the embodiment of the present invention 1;
Fig. 2 is the line map of the embodiment of the present invention 2;
Fig. 3 is the line map of the embodiment of the present invention 3;
Fig. 4 is the line map of the embodiment of the present invention 4;
Fig. 5 is the line map of the embodiment of the present invention 5;
Fig. 6 is the line map of the embodiment of the present invention 6;
Fig. 7 is the line map of the embodiment of the present invention 7;
Fig. 8 is the line map of the embodiment of the present invention 8.
Wherein: the automatic shunt circuit breaker of QF-; The shunt opening coil of the automatic shunt circuit breaker of F-; KA-control relay one, KD-control relay two; FK-control relay three; ZK1-ZK4 is four circuit breakers; FUA-fuse A, FUB-fuse B, FUC-fuse C, FUR-fuse R, FUK-fuse K; HR-indicator light; HA-indicator light A; HB-indicator light B, HC-indicator light C; FL-distribution box housing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.Each contact of implementing the closure state shown in illustration is normally-closed contact, and it is closed for referring to this contact normality, disconnects when relay obtains electric; The contact of the open mode shown in figure is normally opened contact, refers to this contact normality and is off, closed when relay obtains electric.
Embodiment 1
As Fig. 1 gives the line map of a kind of specific embodiment of the present invention.In the present embodiment, KA1, KA3 are normally opened contact, and KA2, KA4 are normally-closed contact; KD2 is normally opened contact, and KD1, KD3, KD4, KD5 are normally-closed contact; FK1 is normally-closed contact.
The present embodiment comprises automatic shunt circuit breaker QF, control relay one KA, control relay two KD; Automatic shunt circuit breaker QF accesses three-phase power line, and control relay one KA accesses between automatic shunt circuit breaker QF leading-out terminal B, C phase line, and control relay two KD accesses between automatic shunt circuit breaker QF leading-out terminal residue A phase line and zero line N; Shunt opening coil F, the normally-closed contact KD1 of control relay two KD, the normally opened contact KA3 sequential series of control relay one KA of the normally opened contact KA1 of control relay one KA, automatically shunt circuit breaker QF, the series circuit X-Y formed is in parallel with control relay one KA; Shunt opening coil F, the normally opened contact KD2 of control relay two KD, the normally-closed contact KA4 sequential series of control relay one KA of the normally-closed contact KA2 of control relay one KA, automatically shunt circuit breaker QF, the series circuit L-M formed is in parallel with control relay two KD.
Zero line N is accessed after casing FL connects with fuse FUK, control relay three FK; The normally-closed contact FK1 of control relay three connects and accesses control relay secondary circuit.
Automatic phase-failure zero-failure power-off protection also comprises fuse FUA, fuse FUB, fuse FUC, indicator light HA, indicator light HB, indicator light HC; Between fuse FUA, indicator light HA and normally-closed contact KD3 series connection access automatic shunt circuit breaker end of incoming cables A phase line and zero line; Between fuse HUB, indicator light HB and normally-closed contact KD4 series connection access automatic shunt circuit breaker end of incoming cables B phase line and zero line, between fuse FUC, indicator light HC and normally-closed contact KD5 series connection access automatic shunt circuit breaker end of incoming cables C phase line and zero line; Above-mentioned normally-closed contact is provided by control relay two in the present embodiment.
Automatic phase-failure zero-failure power-off protection also comprises fuse FUR, indicator light HR; Between fuse FUR, indicator light HR series connection access any phase line of automatic shunt circuit breaker QF leading-out terminal and zero line N.Be connected between C phase and zero line in the present embodiment.
The present embodiment also comprises circuit breaker ZK1-ZK4; Difference series trip device ZK2 and ZK3 between the parallel circuits two ends that control relay one KA and series circuit X-Y is formed and two phase lines; At the parallel circuits two ends that control relay two KD and series circuit L-M is formed and respectively series trip device ZK1 and ZK4 between a remaining phase line and zero line N.
This protective device has four kinds of possible operating states, is presented below respectively:
One, when power network line is powered normal: close circuit breaker ZK1, ZK2, ZK3, ZK4, close fuse FUA, FUB, FUC, FUR, FUK, and close automatic shunt circuit breaker QF.
Power supply B phase → QF → ZK2 → KA → ZK3 → QF → power supply C phase, forms 380V circuit.Control relay KA energized action, its normally opened contact closes, and normally-closed contact disconnects.
Power supply A phase → QF → ZK1 → KD → FK1 → ZK4 → QF → zero-power line N, forms 220V circuit.Control relay KD energized action, it is often opened to get an electric shock and closes, and normally closed electric shock disconnects.
During normal power supply, control relay KA, KD simultaneously electric, make two equal open circuits of loop X-Y and L-M of shunt opening coil F, automatic shunt circuit breaker QF is in normally closed state, normally works.
Power supply C phase → FUR → HR → zero-power line N, indicator light HR is bright, represents working properly.KD3, KD4, KD5 disconnect, and indicator light HA, HB, HC all extinguish, and indicate without phase shortage.
Two, in running, when power supply lacks B phase or scarce C phase time, control relay KA de-energizing actions, normally opened contact disconnects, and normally-closed contact closes, loop X-Y open circuit, loop L-M conducting.
Power supply A phase → QF → ZK1 → KA2 → F → KD2 → KA4 → ZK4 → QF → zero-power line N, forms 220V circuit.Circuit breaker Q F shunt opening coil F energized action, automatic shunt circuit breaker QF trips, and completes power-off protection.Meanwhile, indicator light HR power-off is extinguished.KD3, KD4, KD5 are closed, indicator light HA, HB, HC place in circuit, if the lamp corresponding with A phase, B phase, C phase does not work, represent this phase phase shortage.
Three, in running, when power supply lacks A phase or scarce zero line N, control relay KD de-energizing actions, normally opened contact disconnects, and normally-closed contact closes, loop L-M open circuit, loop X-Y conducting.
Power supply B phase → QF → ZK2 → KA1 → F → KD1 → KA3 → ZK3 → QF → power supply C phase, forms 380V circuit.Circuit breaker Q F shunt opening coil F energized action, automatic shunt circuit breaker QF trips, and completes power-off protection.Meanwhile, indicator light HR power-off is extinguished.KD3, KD4, KD5 are closed, clearing lamp HA, HB, HC place in circuit, if the lamp corresponding with A phase, B phase, C phase does not work, represent this phase phase shortage.
Four, in running, when control cabinet housing FL is charged, FL → FUK → FK → zero-power line N, forms voltage circuit.Control relay FK action, normally-closed contact FK1 disconnects, and makes control relay KD power-off, and its effect is equal to A phase or zero line N phase shortage.
Power supply B phase → QF → ZK2 → KA1 → F → KD1 → KA3 → ZK3 → QF → power supply C phase, forms 380V circuit.Circuit breaker Q F shunt opening coil F energized action, automatic shunt circuit breaker QF trips, and completes power-off protection.Meanwhile, indicator light HR power-off, lamp extinguishes.KD3, KD4, KD5 are closed, indicator light HA, HB, HC place in circuit, and three indicator lights light simultaneously, represent that distribution box housing FL is charged.Embodiment 2
Fig. 2 is the line map of the embodiment of the present invention 2; Two repel each other contact KD1 and KD2 evolutions being thered is provided by control relay two are with the difference of embodiment 1.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 3
Fig. 3 is the line map of the embodiment of the present invention 3; Two repel each other contact KD1 and KD2 evolutions being thered is provided by control relay two are with the difference of embodiment 1.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 4
Fig. 4 is the line map of the embodiment of the present invention 4; Two mutual exclusion contact KD1 being thered is provided by control relay two and KD2 evolution is with the difference of embodiment 1.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 5
Fig. 5 is the line map of the embodiment of the present invention 5; In the present embodiment, control relay one provides the contact of two mutual exclusions, i.e. normally opened contact KA1 and normally-closed contact KA2, and control relay two provides two normally-closed contact KD1 and KD3, two normally opened contact KD2 and KD4; KD1 switching circuit X-Y in series with KA1 and KD3 again after connecting with shunt opening coil F is in parallel with control relay one; KD2 switching circuit L-M in series with KA2 and KD4 again after connecting with shunt opening coil F is in parallel with control relay two; In addition, in the present embodiment, three normally-closed contacts of phase shortage indicating circuit are provided by control relay one.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 6
Fig. 6 is the line map of the embodiment of the present invention 6; Two mutual exclusion contact KA1 being thered is provided by control relay one and KA2 evolution is with the difference of embodiment 5.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 7
Fig. 7 is the line map of the embodiment of the present invention 7; Two mutual exclusion contact KA1 being thered is provided by control relay one and KA2 evolution is with the difference of embodiment 5.Its principle is similar to Example 1, and this is no longer going to repeat them.
Embodiment 8
Fig. 8 is the line map of the embodiment of the present invention 8; Two mutual exclusion contact KA1 being thered is provided by control relay one and KA2 evolution is with the difference of embodiment 5.Its principle is similar to Example 1, and this is no longer going to repeat them.
It should be noted that, during the present invention specifically implements, following change can also be made:
One, the normally-closed contact FK1 of control relay FK, can seal in control relay two KD loop, and also can seal in control relay one KA loop, action principle is identical;
Two, the normally-closed contact on pilot lamp loop, can any one provides separately by control relay KA, KD, and also can combine provides, and also can arrange separately special relay, need to determine depending on relay group number and cost control;
Three, by the contact combination of control relay KA, KD form the switching circuit for controlling shunt opening coil F compound mode can equity substitute, also can increase equivalent redundancy in contact.
The present embodiment object is to make professional and technical personnel in the field understand technical scheme of the present invention according to it and to be implemented; can not limit the scope of the invention with it; protection scope of the present invention is as the criterion with claims; allly disclose according to the present invention any distortion and retouching that technology does, all fall into protection scope of the present invention.The content that protection scope of the present invention discloses with claims is as the criterion.
Claims (6)
1. an Automatic phase-failure zero-failure power-off protection, is characterized in that: comprise automatic shunt circuit breaker, control relay one, control relay two; Automatic shunt circuit breaker access three-phase and four-line supply line, control relay one accesses between any two phase lines of automatic shunt circuit breaker leading-out terminal, and control relay two accesses automatic shunt circuit breaker leading-out terminal and remains one between phase line and zero line; The grouping circuits that the contact that the shunt opening coil access control relay one of automatic shunt circuit breaker and control relay two provide is formed, that to form two be HW highway with the shunt opening coil of automatic shunt circuit breaker, in parallel with control relay one and control relay two respectively contact switch circuit is shunt opening coil power supply;
The contact arrangement principle of described contact switch circuit is: one of them control relay provides two normally opened contacts and two normally-closed contacts, and another control relay provides a normally opened contact and a normally-closed contact; Wherein the both sides of two normally opened contact series connection access shunt opening coils of last control relay, form with last control relay in parallel switching circuit after connecting with the normally-closed contact that another control relay provides; Wherein the both sides of two normally-closed contact series connection access shunt opening coils of last control relay, form with another control relay in parallel switching circuit after connecting with the normally opened contact that another control relay provides;
When normal power supply, two contact switch circuits are off-state, and shunt opening coil passes through without electricity; There is phase shortage when powering, lack zero or housing charged time, wherein a contact switch circuit is by conducting, and shunt opening coil obtains electric, automatic shunt circuit breaker tripping operation power-off protection.
2. a kind of Automatic phase-failure zero-failure power-off protection according to claim 1, it is characterized in that, also comprise control relay three, control relay three and fuse connect after one end be connected with described Automatic phase-failure zero-failure power-off protection casing, the other end is connected with zero line; The normally-closed contact of control relay three is connected with control relay one or control relay two.
3. a kind of Automatic phase-failure zero-failure power-off protection according to claim 1 or 2, is characterized in that the concrete annexation of described contact switch circuit comprises following two kinds:
1) control relay one provides two normally opened contacts and two normally-closed contacts, and control relay two provides a normally opened contact and a normally-closed contact; Two normally opened contacts of control relay one are connected on shunt opening coil both sides, and the switching circuit that the normally-closed contact of control relay two of connecting again in this series circuit is formed is in parallel with control relay one; Two normally-closed contacts of control relay one are connected on shunt opening coil both sides, and the switching circuit that the normally opened contact of control relay two of connecting again in this series circuit is formed is in parallel with control relay two;
2) control relay two provides two normally opened contacts and two normally-closed contacts, and control relay one provides a normally opened contact and a normally-closed contact; Two normally opened contacts of control relay two are connected on shunt opening coil both sides, and the switching circuit that the normally-closed contact of control relay one of connecting again in this series circuit is formed is in parallel with control relay two; Two normally-closed contacts of control relay two are connected on shunt opening coil both sides, and the switching circuit that the normally opened contact of control relay one of connecting again in this series circuit is formed is in parallel with control relay one.
4. a kind of Automatic phase-failure zero-failure power-off protection according to any one of claim 1 or 2, is characterized in that, also comprises three fuses and three phase shortage indicator lights; The every bar phase line in automatic shunt circuit breaker end of incoming cables and access fuse, an indicator light and the relay normally-closed contact of all connecting between zero line; Its repeat circuit normally-closed contact is provided by any one or the other relay arranged in control relay one, control relay two.
5. a kind of Automatic phase-failure zero-failure power-off protection according to any one of claim 1 or 2, is characterized in that, automatic shunt circuit breaker leading-out terminal any connect between phase line with zero line access fuse and an indicator light.
6. a kind of Automatic phase-failure zero-failure power-off protection according to any one of claim 1 or 2, is characterized in that: also comprise four circuit breakers; Respectively connect after a circuit breaker and access between two phase lines again in control relay one two ends; Respectively connect after a circuit breaker and access residue one again between phase line and zero line in control relay two two ends.
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| CN201310359500.XA CN103441466B (en) | 2013-08-16 | 2013-08-16 | A kind of Automatic phase-failure zero-failure power-off protection |
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| CN201310359500.XA CN103441466B (en) | 2013-08-16 | 2013-08-16 | A kind of Automatic phase-failure zero-failure power-off protection |
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| CN103441466B true CN103441466B (en) | 2015-09-30 |
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| CN103986119B (en) * | 2014-05-30 | 2017-06-20 | 国家电网公司 | Lack zero, automatic safety device off zero |
| CN106410741B (en) * | 2015-07-27 | 2019-04-05 | 山东一变电工有限公司 | A kind of omnipotent breaker from power transmission device |
| CN105071340B (en) * | 2015-08-05 | 2017-12-01 | 山西太钢不锈钢股份有限公司 | A kind of protection device of power phase shortage |
| CN105186490B (en) * | 2015-08-17 | 2018-06-15 | 佛山电力设计院有限公司 | Breaker and open-circuit system with zero curve and phase line burn out detection function |
| CN105024341B (en) * | 2015-08-17 | 2018-08-14 | 佛山电力设计院有限公司 | With off zero and open-phase protection breaker and open-circuit system |
| CN106356811A (en) * | 2016-10-27 | 2017-01-25 | 国网冀北电力有限公司张家口供电公司 | Circuit breaker with faulted neutral line and default phase protection function |
| CN107732862B (en) * | 2017-10-20 | 2024-04-19 | 杨蔚星 | Three-phase four-wire omnibearing multifunctional accident electric control protection switch |
| CN108448531B (en) * | 2018-05-02 | 2024-04-09 | 江苏省镇江船厂（集团）有限公司 | Safety protection device for pontoon three-phase four-wire system power distribution system |
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