CN205123236U - Distribution lines protection device - Google Patents
Distribution lines protection device Download PDFInfo
- Publication number
- CN205123236U CN205123236U CN201520604661.5U CN201520604661U CN205123236U CN 205123236 U CN205123236 U CN 205123236U CN 201520604661 U CN201520604661 U CN 201520604661U CN 205123236 U CN205123236 U CN 205123236U
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- China
- Prior art keywords
- phase
- circuit
- relay
- breaker
- phase sequence
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- Expired - Fee Related
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Abstract
The utility model relates to a distribution lines protection device, it includes the three phase power supply circuit, conventional circuit -breaker and loss of phase phase sequence protection relay, this loss of phase phase sequence protection relay's power connection terminal A, power connection terminal B and power connection terminal C correspond the A looks that are connected to the power supply line respectively, the B congruence C go up mutually, draw forth a supplementary wiring on loss of phase phase sequence protection relay's the power connection terminal A, should the supplementary other end ground connection of working a telephone switchboard, supplementary wiring goes up to establish ties has normally closed contact and an auxiliary relay of loss of phase phase sequence protection relay, above -mentioned auxiliary relay's normally closed contact and closing switch establish ties in conventional circuit -breaker's combined floodgate return circuit, above -mentioned auxiliary relay's normally open contact and separating brake switch connect in parallel in conventional circuit -breaker's separating brake return circuit. The utility model discloses circuit structure is simple, the circuit transformation convenient, can with conventional circuit -breaker cooperation realization open -phase protection and phase sequence protect function.
Description
Technical field
The utility model belongs to safe field of power distribution, specifically a kind of distribution line protection device.
Background technology
The low-voltage distribution total control switch that current client powers on used is DW15 Series Air Circuit Breaker switch, and omnipotent breaker is generally provided with closing circuit, sub-gate circuit, no-voltage release etc., and it has the functions such as overload, under-voltage, short-circuit protection.Wherein, closing circuit and sub-gate circuit are generally respectively by closing switch and separating brake switch opens.
The no-voltage release operating voltage of omnipotent breaker is AC380V; what when manufacturer generally gives the power supply wiring of no-voltage release, acquiescence connected is power supply A phase and C phase; annexation is not had with B phase; when distribution line B phase breaks or be under-voltage, this omnipotent breaker switch does not have any protective effect.Meanwhile, transformer station does not collect any circuit breaking information, does not have any protective effect yet.In addition; most client's power consumption equipment does not install under-voltage or broken wire protecting equipment yet; thus customer equipment can be caused to run under the condition of phase shortage; when after operation a period of time; client's motor can generate heat; then can cause the consequences such as insulation breakdown and motor burn out afterwards, bring the loss that can not estimate to client.
Along with the fast development of electrical network; a certain section of main line or a certain branched line upgrading of distribution line are very general; the front workmen of transformation does not carry out phase sequence and checks; after causing track remodelling, phase sequence there occurs change; because much user power utilization equipment does not install negative phase sequence protective device; cause transforming the customer equipment cisco unity malfunction on circuit, time serious, can device damage be caused.
Based on the feature of above-mentioned two kinds of defects and omnipotent breaker, the utility model develops a kind of line protective devices.
Utility model content
The technical problems to be solved in the utility model is to provide that a kind of circuit structure is simple, track remodelling is convenient, can coordinate the distribution line protection device realizing open phase protection and phase sequence function with omnipotent breaker.
For solving the problems of the technologies described above, a kind of distribution line protection device of the utility model, comprise and there is A phase, the supply line of B phase and C phase and the omnipotent breaker be connected in supply line, the closing circuit of omnipotent breaker is connected with closing switch, the sub-gate circuit of omnipotent breaker is connected with separating brake switch, the power supply of the no-voltage release of omnipotent breaker draws A phase and the C phase of self-powered circuit, its design feature is that described protective device also comprises a disconnected phase phase sequence protective relay, the power supply terminal A of this disconnected phase phase sequence protective relay, power supply terminal B and power supply terminal C is connected respectively the A phase to supply line, in B phase and C phase, extraction auxiliary connection on the power supply terminal A of disconnected phase phase sequence protective relay, the other end ground connection of this auxiliary connection, auxiliary connection is in series with normally-closed contact and an auxiliary relay of disconnected phase phase sequence protective relay, the normally-closed contact of above-mentioned auxiliary relay and closing switch are connected in the closing circuit of omnipotent breaker, the normally opened contact of above-mentioned auxiliary relay and separating brake switch in parallel are in the sub-gate circuit of omnipotent breaker.
Small-sized 3P circuit breaker is connected with between described disconnected phase phase sequence protective relay and supply line.
Described disconnected phase phase sequence protective relay is that the XJ3-D type with dislocation phase indicator light, under-voltage indicator light and overvoltage indicator light breaks phase phase sequence protective relay.
The beneficial effects of the utility model are: when a certain in three-phase power line break mutually phase or a certain line voltage < 60%Ue or phase sequence change, disconnected phase phase sequence protective relay action, the normally-closed contact of disconnected phase phase sequence protective relay recovers closure state, the current supply circuit of conducting auxiliary relay, auxiliary relay action, the normally opened contact of auxiliary relay closes, thus by the conducting of manual brake separating loop, complete and the automatic brake separating of omnipotent breaker is operated, simultaneously, the normally-closed contact of auxiliary relay is opened, closing circuit cannot conducting, thus avoid some omnipotent breaker with automatic switching-in function and carry out electric switch-on, further ensure fail safe.Visible, utilize circuit structure of the present utility model, there is disconnected phase once three phase mains, certain is mutually under-voltage or phase sequence changes any one situation in three kinds of situations, omnipotent breaker automatic brake separating and cannot closing a floodgate, can only wait for that maintainer reaches the spot maintenance, avoid subscriber equipment in circuit and run under the state of disconnected phase, under-voltage or misphase; Simultaneously, disconnected phase phase sequence protective relay in the utility model is drawn from the bypass of supply line and is isolated by small-sized 3P circuit breaker, track remodelling facilitates and utilizes small-sized 3P circuit breaker can close defencive function at any time, can not impact existing line and omnipotent breaker; In addition, utilize XJ3-D type to break phase phase sequence protective relay, failure cause can be observed at any time by the indicator light on it, facilitate staff to take measures in time to restore electricity in time.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is circuit principle structure schematic diagram of the present utility model.
Embodiment
With reference to accompanying drawing, this distribution line protection device comprises and has A phase, the supply line of B phase and C phase and the omnipotent breaker 1 be connected in supply line, the closing circuit of omnipotent breaker 1 is connected with closing switch SB1, the sub-gate circuit of omnipotent breaker 1 is connected with separating brake switch S B2, the power supply of the no-voltage release of omnipotent breaker 1 draws A phase and the C phase of self-powered circuit, this protective device also comprises a disconnected phase phase sequence protective relay 2, the power supply terminal A of this disconnected phase phase sequence protective relay 2, power supply terminal B and power supply terminal C is connected respectively the A phase to supply line, in B phase and C phase, extraction auxiliary connection 3 on the power supply terminal A of disconnected phase phase sequence protective relay 2, the other end ground connection of auxiliary connection 3, auxiliary connection 3 is in series with a normally-closed contact 2-1 and auxiliary relay 4 of disconnected phase phase sequence protective relay, the normally-closed contact 4-1 of above-mentioned auxiliary relay and closing switch SB1 is connected in the closing circuit of omnipotent breaker 1, normally opened contact 4-2 and the separating brake switch S B2 of above-mentioned auxiliary relay are connected in parallel in the sub-gate circuit of omnipotent breaker 1.
In foregoing circuit structure, when a certain in three-phase power line break mutually phase or a certain line voltage < 60%Ue or phase sequence change, disconnected phase phase sequence protective relay 2 action, the normally-closed contact of disconnected phase phase sequence protective relay recovers closure state, the current supply circuit of conducting auxiliary relay 4, auxiliary relay 4 action, the normally opened contact 4-2 of auxiliary relay closes, thus by the conducting of manual brake separating loop, complete and the automatic brake separating of omnipotent breaker 1 is operated, simultaneously, the normally-closed contact 4-1 of auxiliary relay opens, closing circuit cannot conducting, thus avoid some omnipotent breaker 1 with automatic switching-in function and carry out electric switch-on, further ensure fail safe.Visible, utilize circuit structure of the present utility model, there is disconnected phase once three phase mains, certain is mutually under-voltage or phase sequence changes any one situation in three kinds of situations, omnipotent breaker carries out automatic brake separating operation and cannot close a floodgate, can only wait for that maintainer reaches the spot maintenance, avoid subscriber equipment in circuit and run under the state of disconnected phase, under-voltage or misphase
With reference to accompanying drawing, break and between phase phase sequence protective relay 2 and supply line, be connected with small-sized 3P circuit breaker 5.Disconnected phase phase sequence protective relay 2 is drawn from the bypass of supply line and is isolated by small-sized 3P circuit breaker 5, and track remodelling facilitates and utilizes small-sized 3P circuit breaker can close defencive function at any time, can not impact existing line and omnipotent breaker 1.
With reference to accompanying drawing, disconnected phase phase sequence protective relay 2 to break phase phase sequence protective relay for the XJ3-D type with dislocation phase indicator light, under-voltage indicator light and overvoltage indicator light.Utilize XJ3-D type to break phase phase sequence protective relay, failure cause can be observed at any time by the indicator light on it, facilitate staff to take measures in time to restore electricity in time.
Claims (3)
1. a distribution line protection device, comprise and there is A phase, the supply line of B phase and C phase and the omnipotent breaker (1) be connected in supply line, the closing circuit of omnipotent breaker (1) is connected with closing switch (SB1), the sub-gate circuit of omnipotent breaker (1) is connected with separating brake switch (SB2), the power supply of the no-voltage release of omnipotent breaker (1) draws A phase and the C phase of self-powered circuit, it is characterized in that described protective device also comprises a disconnected phase phase sequence protective relay (2), the power supply terminal A of this disconnected phase phase sequence protective relay (2), power supply terminal B and power supply terminal C is connected respectively the A phase to supply line, in B phase and C phase, extraction auxiliary connection (3) on the power supply terminal A of disconnected phase phase sequence protective relay (2), the other end ground connection of auxiliary connection (3), auxiliary connection (3) is in series with normally-closed contact (2-1) and an auxiliary relay (4) of disconnected phase phase sequence protective relay, normally-closed contact (4-1) and the closing switch (SB1) of above-mentioned auxiliary relay are connected in the closing circuit of omnipotent breaker (1), normally opened contact (4-2) and the separating brake switch (SB2) of above-mentioned auxiliary relay are connected in parallel in the sub-gate circuit of omnipotent breaker (1).
2. distribution line protection device as claimed in claim 1, is characterized in that being connected with small-sized 3P circuit breaker (5) between described disconnected phase phase sequence protective relay (2) and supply line.
3. distribution line protection device as claimed in claim 1 or 2, is characterized in that described disconnected phase phase sequence protective relay (2) to be broken phase phase sequence protective relay for the XJ3-D type with dislocation phase indicator light, under-voltage indicator light and overvoltage indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520604661.5U CN205123236U (en) | 2015-08-04 | 2015-08-04 | Distribution lines protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520604661.5U CN205123236U (en) | 2015-08-04 | 2015-08-04 | Distribution lines protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205123236U true CN205123236U (en) | 2016-03-30 |
Family
ID=55578812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520604661.5U Expired - Fee Related CN205123236U (en) | 2015-08-04 | 2015-08-04 | Distribution lines protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123236U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086554A (en) * | 2017-05-26 | 2017-08-22 | 中领世能（天津）科技有限公司 | Electric power system and its multi-stage protection device |
| CN107248835A (en) * | 2017-06-28 | 2017-10-13 | 安徽舜禹水务股份有限公司 | It is a kind of to eliminate the system that phase sequence relay is damaged by harmonic wave interference |
| CN107919665A (en) * | 2017-11-13 | 2018-04-17 | 湖北三江航天万山特种车辆有限公司 | A kind of electrical system of electric self-propelled modular cart |
-
2015
- 2015-08-04 CN CN201520604661.5U patent/CN205123236U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107086554A (en) * | 2017-05-26 | 2017-08-22 | 中领世能（天津）科技有限公司 | Electric power system and its multi-stage protection device |
| CN107248835A (en) * | 2017-06-28 | 2017-10-13 | 安徽舜禹水务股份有限公司 | It is a kind of to eliminate the system that phase sequence relay is damaged by harmonic wave interference |
| CN107248835B (en) * | 2017-06-28 | 2019-09-17 | 安徽舜禹水务股份有限公司 | A kind of system eliminating phase sequence relay and being damaged by harmonic wave interference |
| CN107919665A (en) * | 2017-11-13 | 2018-04-17 | 湖北三江航天万山特种车辆有限公司 | A kind of electrical system of electric self-propelled modular cart |
| CN107919665B (en) * | 2017-11-13 | 2020-10-09 | 湖北三江航天万山特种车辆有限公司 | Electric system of electric self-propelled module vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20160804 |