CN106953400B - Novel three-phase four-wire distribution network tie switch - Google Patents
Novel three-phase four-wire distribution network tie switch Download PDFInfo
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- CN106953400B CN106953400B CN201710098531.2A CN201710098531A CN106953400B CN 106953400 B CN106953400 B CN 106953400B CN 201710098531 A CN201710098531 A CN 201710098531A CN 106953400 B CN106953400 B CN 106953400B
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- switch group
- knife switch
- leakage protector
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- Engineering & Computer Science (AREA)
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Abstract
The application belongs to the field of automatic engineering of distribution networks, and particularly relates to a novel three-phase four-wire distribution network interconnection switch, which comprises a box body and a box door, wherein a supporting and fixing plate is arranged in the box body, a first knife switch group and a second knife switch group which is arranged side by side with the first knife switch group are arranged at the upper part of the supporting and fixing plate, a first leakage protector and a second leakage protector which is arranged side by side with the first leakage protector are arranged at the lower part of the supporting and fixing plate, an upper lead interface of the first knife switch group is communicated with an external load through a conductor, and a lower lead interface of the first knife switch group is connected with an upper lead interface of the first leakage protector through the conductor. The application can connect two independent circuits according to specific conditions (mainly detecting whether the electrified circuit is electrified) so as to realize the access of the standby power supply of the power-off circuit, reduce the power-off range and the power-off time, and simultaneously have the functions of misoperation prevention, isolation, locking, protection, indication and the like.
Description
Technical Field
The application belongs to the field of power distribution network automation engineering, and particularly relates to a novel three-phase four-wire power distribution network interconnection switch.
Background
The contact switch is arranged in the contact cabinet and plays a role in contact. The main control cabinet of the two transformers is respectively outgoing into the connecting cabinet. The upper and lower ports of the contact cabinet are respectively connected with the outgoing lines of the two main controls, namely, one adopts an upper port incoming line and the other adopts a lower port incoming line. But for 2 sets of and above simultaneous power supply systems, the main function of the connecting cabinet is that after another set of system has a power failure or a power failure fault, another set of power supply system can give the power supply of the outlet cabinet of the power failure system through the connecting cabinet so as to enable a power distribution group using the power failure system to be electrified.
The existing connection mode of the connection switch is very complicated, so that wires in the connection cabinet are disordered, and a great deal of inconvenience is brought to maintenance personnel; the leakage protection device is generally arranged in each group of lines, and the connection of the conventional tie switch is complex and single due to the characteristic that the leakage protection device cannot be reversely connected, the unidirectional conduction switch cannot be used, and a person is required to perform opening and closing operations on site.
The existing electric devices capable of automatically controlling switching are generally electric power taken from a wire inlet, and the original tie switch is generally connected with a part of operating mechanism which needs an independent power supply.
Disclosure of Invention
Aiming at the problems, the application provides the novel three-phase four-wire distribution network interconnection switch which has the advantages of convenient and novel connection mode and higher intelligent degree, can realize automatic input of single-side power failure, can also manually control input, and can use a one-way conduction switch.
In order to achieve the aim, the application adopts the technical proposal that,
the utility model provides a novel three-phase four-wire distribution network tie switch, includes box and chamber door, the inside support fixed plate that is provided with of box, the upper portion of support fixed plate is provided with first knife switch group and with the second knife switch group that first knife switch group set up side by side, the lower part is provided with first earth leakage protector and with the second earth leakage protector that first earth leakage protector set up side by side, first knife switch group upper portion wire interface passes through a conductor and an outside load intercommunication, and the lower part interface passes through the upper portion wire interface connection setting of conductor and first earth leakage protector, the upper portion wire interface of first earth leakage protector passes through the upper portion wire interface connection setting of conductor and second knife switch group, the upper portion wire interface of second knife switch group passes through the conductor and another transformer intercommunication of outside, the lower part wire interface of second earth leakage protector passes through the conductor and sets up with the wire interface connection setting on first knife switch group upper portion.
Preferably, a switch on-off controller is arranged on the inner side of the box door.
Preferably, a storage box arranged on the inner side of the box door is arranged at the lower part of the switch on-off controller.
Preferably, a terminal strip with a fuse is arranged on the inner wall of the left side of the box body.
Preferably, a terminal strip is arranged on the inner wall of the right side of the box body.
Preferably, the conductor is a conductive copper sheet.
Compared with the prior art, the application has the advantages and positive effects that,
the application can connect two independent circuits according to specific conditions (mainly detecting whether the electrified circuit is electrified) so as to realize the access of the standby power supply of the power-off circuit, reduce the power-off range and the power-off time, and simultaneously have the functions of misoperation prevention, isolation, locking, protection, indication and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural diagram of a novel three-phase four-wire distribution network tie switch;
fig. 2 is a schematic structural diagram of a novel three-phase four-wire distribution network tie switch (another angle);
fig. 3 is a schematic structural diagram of a novel three-phase four-wire distribution network tie switch (viewed from the rear);
FIG. 4 is a schematic diagram of a circuit aspect in a novel three-phase four-wire distribution network tie switch;
FIG. 5 is a circuit diagram illustrating a specific operation of a novel three-phase four-wire distribution network tie switch in circuit aspects;
FIG. 6 is a schematic circuit diagram showing the line voltage in embodiment 1;
FIG. 7 is a schematic diagram of the circuit showing the line voltage in embodiment 1;
FIG. 8 is a schematic circuit diagram showing phase voltages in example 1;
FIG. 9 is a schematic diagram of the circuit showing the phase voltages in example 1;
FIG. 10 is a circuit diagram showing scheme one of the currents in example 1;
FIG. 11 is a circuit diagram showing scheme II in current in example 1;
FIG. 12 is a circuit diagram of one of the electrical interlocks of example 1;
FIG. 13 is a circuit diagram of another embodiment of the electrical interlock of example 1;
FIG. 14 is a schematic circuit diagram of a second embodiment of the electrical interlock of example 1;
FIG. 15 is a circuit diagram of a third embodiment of the electrical interlock of example 1;
FIG. 16 is a circuit diagram of the third alternative of the electrical interlock of example 1;
FIG. 17 is a circuit diagram of scheme one of the electronic interlocks of example 1;
fig. 18 is a circuit diagram of a second embodiment of the electronic interlock in embodiment 1;
in the above figures, 1, a box body; 2. a door; 3. a first knife switch group; 4. a second knife switch group; 5. a first leakage protector; 6. a second leakage protector; 7. a switch on-off controller; 8. a conductor.
Detailed Description
In order that the above objects, features and advantages of the application will be more clearly understood, a further description of the application will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments of the disclosure that follow.
The embodiment 1, as shown in fig. 1, 2 and 3, provides a novel three-phase four-wire distribution network tie switch, which comprises a box body and a box door, wherein the box body is designed to be carefully designed, namely, the box body is integrally formed, so that dust and moisture can be effectively prevented, the box door is hinged with the box body, and in order to improve the sealing performance, the inventor is provided with a sealing door edge on the box body, and water can flow down along the door edge; the inside of the box body is provided with a supporting and fixing plate, namely key components of the contact switch are arranged on the supporting and fixing plate; as can be seen from fig. 1, a first knife switch group and a second knife switch group which are arranged side by side with the first knife switch group are arranged at the upper part of the supporting and fixing plate, a first leakage protector and a second leakage protector which is arranged side by side with the first leakage protector are arranged at the lower part, the shape, the size and the functions of the first knife switch group and the second knife switch group are the same, so that the two knife switch groups are specifically named for easily distinguishing the specific connection relation inside, the first leakage protector and the second leakage protector are the same, and the knife switch component selected by the application is the whole knife switch, and can be an on-off switch of a relatively intelligent point, and the main reason of the knife switch is that the knife switch has obvious on-off indication function; the on-off condition of the position can be more clearly known by an operator, and the leakage protector arranged in the line has the functions of switching on and off with load, detecting leakage current, protecting people or animals from electric shock, and protecting the power transmission line from faults such as grounding.
The manner of connecting the knife switch and the earth leakage protector in the present application will be described in detail. It is to be noted that, for the knife switch and the earth leakage protector, the upper and lower parts are provided with wiring ports, and are three-phase four-wire; as shown in fig. 4 and 5, the upper wire interface of the first knife switch group is communicated with an external load through a conductor, the lower wire interface is connected with the upper wire interface of the first leakage protector through a conductor, the upper wire interface of the first leakage protector is connected with the upper wire interface of the second knife switch group through a conductor, the upper wire interface of the second knife switch group is communicated with another external transformer through a conductor, the lower wire interface is connected with the upper wire interface of the second leakage protector through a conductor, and the lower wire interface of the second leakage protector is communicated with the wire interface at the upper part of the first knife switch group through a conductor; adopt foretell connected mode for first knife switch group, second knife switch group, first leakage protector, circular telegram end, two transformers and user form two lines between, thereby realized the purpose of tie switch, one is: one transformer, first knife switch group, first earth leakage protector, user, another is: another transformer, a second knife switch group, a second leakage protector and a user; under normal conditions, current is directly conducted to a user through the transformer, and if the lead at the position cannot be normally electrified, an operator can quickly enable the user to normally use electricity through the overhead knife switch group.
A detection plate is arranged on the leakage protector, the leakage protector cannot be switched when the lower port of the leakage protector is electrified, whether the leakage protector is automatically switched or not can be selected, and the leakage protector can be switched only by short-circuiting the short interface in a non-automatic switching state.
The leakage protection is set to be automatic switching, when the two knife switches are all closed, the leakage protection detects that the upper opening is electrified, and when the lower opening is not electrified, the leakage protection can be switched, so that the automatic switching function of the device is realized, for example, two transformers are simultaneously powered, the leakage protection can trip due to the property of the two transformers, and the automatic cutting function is realized.
In order to further optimize the tie switch to make it more intelligent, the inventor also provided a switch on-off controller on the inside of the box door, the switch on-off controller having a display line voltage, a display phase voltage, a display current.
1.1 line voltage (as shown in FIG. 6 and FIG. 7)
Scheme one: and a voltmeter and at least three-gear change-over switch are utilized to display the voltages of AB, AC and BC three-phase lines. If digital display is used, a power supply may be required to take power;
scheme II: and displaying the voltages of the AB, AC and BC three-phase lines by using three voltmeters or a three-phase voltmeter. If digital display is used, power source power extraction may be required.
Scheme III: 485 communication is utilized.
1.2 display phase Voltage
Scheme one: as shown in fig. 8, a three-phase voltage is displayed A, B, C using a voltmeter, an at least three-position change-over switch. If digital display is used, power source power extraction may be required.
Scheme II: as shown in fig. 9, the A, B, C three-phase line voltage is displayed using three voltmeters or a three-phase voltmeter. If digital display is used, power source power extraction may be required.
1.3 display Current
Scheme one: as shown in fig. 10, a three-phase current is displayed A, B, C using an ammeter, an at least three-gear change-over switch. If digital display is used, a power supply may be required to take power;
scheme II: as shown in fig. 11, a A, B, C three-phase current is displayed using three ammeters or one three-phase ammeters. If digital display is used, power source power extraction may be required.
The application aims to prevent bi-directional power supply, i.e. with inter-switch interlocks.
1.1 electrically interlocking normally open and normally closed contacts such as a relay, a circuit breaker, a leakage protector and the like.
As shown in fig. 12 and 13, first, the automatic switching function control of the leakage protection is performed by using relay interlocking. (the disadvantage is that if the tie switch is being put into operation and there is no obvious disconnection point with the other side transformer, if the B transformer is suddenly supplied with power, problems easily occur, and thus a warning indication is required on the switch.)
As shown in fig. 14, in the second example, the relay is used for electrically interlocking and controlling the switching of the AB leakage protection. The lower end of the phase B leakage protection is detected to have electricity, the phase A leakage protection can be thrown when the phase A is not electrified and the upper end of the phase B leakage protection has electricity (at the moment, the leakage protection can be thrown after the control port is short-circuited for a period of time, and the common leakage protection control program is that the control port is continuously short-circuited when the phase B leakage protection is thrown). (if the tie switch is connected to the place with the disconnection point on the outgoing line side of the B transformer, the relay is connected to the transformer part from the upper side of the disconnection point, the common leakage protection can be used, if the leakage protection control program is changed into a control terminal for closing the leakage protection input, the disconnection and cutting can be realized, and the function of opening the leakage protection when the transformer is suddenly powered can be realized)
As shown in fig. 15 and 16, in the third embodiment, the normally open and normally closed contacts of the leakage protection are used for interlocking, and at this time, the leakage protection input control program criterion is that the leakage protection input control program is input after the control port is short-circuited for a period of time.
And fourthly, detecting whether the two transformers have voltage and current by using a controller, and then controlling the input of the leakage protection.
1.2 electronic interlocking is performed with a controller.
As shown in fig. 17, the first step is that the AB two-leakage-protection 485 communication port or the short-circuit switching control port is connected with the controller, and the controller controls the AB leakage protection switching, that is, the leakage protection itself detects whether the upper side and the lower side are electrified, and the lower side is electrified, and the leakage protection can be switched (1. The general leakage protection does not have the function, i.e. the manufacturer of the leakage protection requires to add, 2. The voltage can be adopted as single-phase voltage or line voltage, and whether the voltage exists or not is determined); and as shown in fig. 18, the controller detects whether the upper and lower ports of the leakage protection are electrified, and then the leakage protection input is controlled (the common leakage protection can be realized).
As can be seen from fig. 1, the inventors have also provided a pocket provided inside the door at the lower part of the switch on-off controller, which mainly houses some related tools and the like, and the switch fuse controller mainly detects the above data, such as various voltages and the like.
The inner wall of the left side of the inside of the box body is provided with a terminal strip with a fuse, and the inner wall of the right side of the inside of the box body is provided with a terminal strip which is relatively common, so that the terminal strip is not described in detail herein.
The conductor is a conductive copper sheet.
The conductors for connecting the key components are disposed behind the support and fixing plate except for the conductors for connecting the knife switch assembly and the earth leakage protector vertically up and down.
The present application is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present application without departing from the technical content of the present application still belong to the protection scope of the technical solution of the present application.
Claims (6)
1. The utility model provides a novel three-phase four-wire distribution network tie switch, includes box and chamber door, its characterized in that, the inside support fixed plate that is provided with of box, the upper portion of support fixed plate is provided with first knife switch group and with the second knife switch group that first knife switch group set up side by side, the lower part is provided with first earth leakage protector and with the second earth leakage protector that first earth leakage protector set up side by side, first knife switch group upper portion wire interface passes through a conductor and an outside load intercommunication, and the lower part interface passes through the upper portion wire interface connection setting of conductor and first earth leakage protector, the upper portion wire interface of first earth leakage protector passes through the upper portion wire interface connection setting of conductor and second knife switch group, the upper portion wire interface of second knife switch group passes through the conductor and communicates with another outside transformer, the lower part wire interface of second earth leakage protector passes through the conductor and sets up with the wire interface connection setting on first knife switch group upper portion.
2. The novel three-phase four-wire distribution network tie switch of claim 1, wherein a switch on-off controller is arranged on the inner side of the box door.
3. The novel three-phase four-wire distribution network tie switch according to claim 2, wherein a pocket arranged inside the door is provided at the lower part of the switch on-off controller.
4. The novel three-phase four-wire distribution network interconnection switch of claim 1, wherein a terminal strip with a fuse is arranged on the inner wall of the left side of the box body.
5. The novel three-phase four-wire distribution network tie switch of claim 1, wherein a terminal block is arranged on the inner wall of the right side inside the box body.
6. The novel three-phase four-wire distribution network tie switch of claim 1, wherein the conductor is a conductive copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098531.2A CN106953400B (en) | 2017-02-23 | 2017-02-23 | Novel three-phase four-wire distribution network tie switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710098531.2A CN106953400B (en) | 2017-02-23 | 2017-02-23 | Novel three-phase four-wire distribution network tie switch |
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| Publication Number | Publication Date |
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| CN106953400A CN106953400A (en) | 2017-07-14 |
| CN106953400B true CN106953400B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710098531.2A Active CN106953400B (en) | 2017-02-23 | 2017-02-23 | Novel three-phase four-wire distribution network tie switch |
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| US5973899A (en) * | 1998-09-10 | 1999-10-26 | Pacificorp | Automated power feeder restoration system and method |
| JP2009055731A (en) * | 2007-08-28 | 2009-03-12 | Tokyo Netsukyokyu Kk | Automatic power recovery system of spot network power receiving equipment |
| CN203135556U (en) * | 2013-03-27 | 2013-08-14 | 国家电网公司 | Emergency power supply assembly |
| CN104993582A (en) * | 2015-01-27 | 2015-10-21 | 卢洁 | Electric power system control method and apparatus |
| CN105281421A (en) * | 2015-09-29 | 2016-01-27 | 洛阳新思路电气股份有限公司 | Dynamo-electric integrated locking automatic control device |
| CN205985816U (en) * | 2016-07-14 | 2017-02-22 | 国网山东省电力公司平原县供电公司 | Novel customer end power table case |
| CN206471914U (en) * | 2017-02-23 | 2017-09-05 | 山东电工电气集团新能科技有限公司 | The line power distribution network interconnection switch of Three phase four |
-
2017
- 2017-02-23 CN CN201710098531.2A patent/CN106953400B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973899A (en) * | 1998-09-10 | 1999-10-26 | Pacificorp | Automated power feeder restoration system and method |
| JP2009055731A (en) * | 2007-08-28 | 2009-03-12 | Tokyo Netsukyokyu Kk | Automatic power recovery system of spot network power receiving equipment |
| CN203135556U (en) * | 2013-03-27 | 2013-08-14 | 国家电网公司 | Emergency power supply assembly |
| CN104993582A (en) * | 2015-01-27 | 2015-10-21 | 卢洁 | Electric power system control method and apparatus |
| CN105281421A (en) * | 2015-09-29 | 2016-01-27 | 洛阳新思路电气股份有限公司 | Dynamo-electric integrated locking automatic control device |
| CN205985816U (en) * | 2016-07-14 | 2017-02-22 | 国网山东省电力公司平原县供电公司 | Novel customer end power table case |
| CN206471914U (en) * | 2017-02-23 | 2017-09-05 | 山东电工电气集团新能科技有限公司 | The line power distribution network interconnection switch of Three phase four |
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