CN202534944U - Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch - Google Patents
Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch Download PDFInfo
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- CN202534944U CN202534944U CN2012201266403U CN201220126640U CN202534944U CN 202534944 U CN202534944 U CN 202534944U CN 2012201266403 U CN2012201266403 U CN 2012201266403U CN 201220126640 U CN201220126640 U CN 201220126640U CN 202534944 U CN202534944 U CN 202534944U
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Abstract
The utility model discloses a power transformation system with a spare-free low-voltage switch connected in parallel with a by-pass switch. The system comprises a plurality of transformers, a plurality of ingoing lines, a bus, and a plurality of outgoing lines. Specifically, the plurality of ingoing lines are respectively in circuit connection with input terminals of all the transformers; output terminals of the transformers are respectively in circuit connected with the bus; and the outgoing lines are connected in parallel with the bus. Circuit breakers that are spare-free low-voltage switches are in circuit connection with the outgoing lines; one circuit breaker of at least one outgoing line is connected in parallel with a by-pass switch. According to the utility model, the by-pass switch is connected in parallel to an original spare-free low-voltage switch of the power transformation system; therefore, when there is a fault at the original spare-free low-voltage switch, the by-pass switch can used directly to replace the original spare-free low-voltage switch so as to avoid spending much time in repairing the original spare-free low-voltage switch, thereby improving security and reliability and ensuring stable power supply of a distribution network.
Description
Technical field
The utility model relates to the power transformation system in a kind of distribution network, is specifically related to a kind of power transformation system that is connected in parallel to by-pass switch on the spare unit low tension switch that do not have.
Background technology
No spare unit low tension switch mainly is meant following two types of low tension switches: one type is to put into operation the age early, stopped production the low tension switch of such model of manufacturer.Like totally 67 at neighbour station, 2 of case changes that Pudong District puts into operation and surpasses 20 years, the low tension switch of operation has 765 in standing, and totally 278 at the neighbour station, the case that put into operation between 15 years to 20 years become nearly 200, and the low tension switch that moves in standing has 4377.The most models of these low tension switches are older, near or surpass service life.Such model because manufacturer stops production causes to obtain spare unit.Another kind of being meant not at company's buying catalogue, the present low tension switch of not in stock again.The AH type low tension switch of Beijing Switch Factory for example, Pudong District is on totally 478 on net at present.Owing to do not have spare unit, bring very big hidden danger to operation.
Under the regular situation, surpass 20 years for putting into operation and take the technological transformation mode to change old equipment.But because fund for technical innovation is limited, most site apparatus still need exceed the time limit to move.In case these no spare unit switch generation defectives can not be moved, can only take improper mode such as direct-connected to supply power temporarily, rush to repair length not only consuming time, and direct-connected back can't distinguish all to situation such as sending payload, faults, greatly influence power supply safety.
Do not break down, need to change in case there is the spare unit low tension switch, take which kind of mode to rush to repair, restore electricity as early as possible the subject matter that is the consideration of operation department.
The utility model content
The utility model provides a kind of power transformation system that is connected in parallel to by-pass switch on the spare unit low tension switch that do not have; Replaced former no spare unit low tension switch with by-pass switch; The repairing time that is caused when avoiding not having spare unit low tension switch fault is long, guarantees the distribution network stable power-supplying.
For realizing above-mentioned purpose, the utility model provides a kind of power transformation system that is connected in parallel to by-pass switch on the spare unit low tension switch that do not have, and is characterized in that this system comprises:
Some transformers;
Some inlet wires, it is the input of each transformer of circuit connection respectively;
Bus, the output of some transformers circuit respectively are connected on this bus;
Some outlets, it is connected in parallel on the above-mentioned bus;
Circuit is connected with circuit breaker in the every above-mentioned outlet, and it is the low tension switch of no spare unit;
Be connected in parallel to by-pass switch on the circuit breaker of at least one above-mentioned outlet.
Be connected in series with circuit breaker between transformer that each is above-mentioned and the bus.
Between the junction of every adjacent two transformers and bus, circuit is connected with circuit breaker on the above-mentioned bus.
The two ends that are arranged at the circuit breaker on the bus also respectively circuit be connected with 0.4 kilovolt of capacitor.
Above-mentioned transformer adopting is with 10 kilovolts of transformers that are depressurized to 0.4 kilovolt.
The utility model does not have the power transformation system that is connected in parallel to by-pass switch on the spare unit low tension switch and the transformer station of prior art compares; Its advantage is; The utility model adopts by-pass switch to be connected in parallel in the former no spare unit low tension switch place in the power transformation system; When former no spare unit low tension switch breaks down, directly can replace former no spare unit low tension switch through by-pass switch, avoid spending the plenty of time former no spare unit low tension switch is rushed to repair; Improve fail safe and reliability, guarantee the distribution network stable power-supplying.
Description of drawings
The circuit theory diagrams of Fig. 1 is connected in parallel to by-pass switch for the utility model does not have on the spare unit low tension switch power transformation system.
Embodiment
Below in conjunction with accompanying drawing, further specify the embodiment of the utility model.
As shown in Figure 1; The utility model is a kind of not to have the power transformation system implementation example that is connected in parallel to by-pass switch on the spare unit low tension switch; This system comprises two transformers 1; This voltage device 1 adopts 10 kilovolts of transformers that are depressurized to 0.4 kilovolt, is used for 10 kilovolts high-tension electricity of input is depressurized to 0.4 kilovolt of output.
The input of each transformer 1 all circuit is connected with two inlet wires 2, and the circuit of output terminal of this inlet wire 2 connects external high-voltage web system, receives 10 kilovolts of high-tension electricity inputs.
Native system also comprises a bus 3, and this bus 3 is used for 0.4 kilovolt bus.Circuit is connected with a circuit breaker 5 on this bus 3, and this circuit breaker 5 is divided into two sections with bus 3: 0.4 kilovolt of one section bus and 0.4 kilovolt of two sections bus.At the two ends of this circuit breaker 5 also respectively circuit be connected with 0.4 kilovolt of capacitor 7.The output of two above-mentioned transformers 1 circuit respectively is connected on 0.4 kilovolt of one section bus and 0.4 kilovolt of two sections bus.
On the output of each transformer 1 and bus 3, also be connected in series with a circuit breaker 5, be used at any time with opening circuit between transformer 1 and the bus 3.
Native system also includes some outlets 4, and these some outlets 4 are connected in parallel on the bus 3, and the circuit of output terminal of outlet 4 connects the power consumer in downstream.All go back circuit in the every outlet 4 and be connected with circuit breaker 5, those circuit breakers 5 are the low tension switch of no spare unit, when it breaks down, are difficult to maintenance.
In these some outlets 4, have on the circuit breaker 5 of one or one above outlet 4 to be connected in parallel to by-pass switch 6.
The bypass switch 6 using Chinese five company SM40EP series of low-voltage switchgear Jiu bypass switch for AC 50Hz, tuning current from 160A to 400A, rated insulation voltage 800V, rated working voltage 400V, and with isolation.
The installation procedure of this by-pass switch 6 is following: three branch cables are inserted in the three-phase end of incoming cables of by-pass switch 6, three branch cables are inserted in the three-phase leading-out terminal of by-pass switch 6 again.By-pass switch 6 is kept gate-dividing state; By-pass switch 6 and former no spare unit low tension switch are connected in parallel; Wherein, The cable circuit of cable in the three-phase end of incoming cables that is inserted in by-pass switch 6 with former circuit median generatrix 3 sides is connected, and will be inserted in output one side that cable circuit in the three-phase leading-out terminal of by-pass switch 6 is connected in outlet 4 in the former circuit.
When former no spare unit low tension switch breaks down,, make the distribution network stable power-supplying then, guarantee electric power output even can by-pass switch 6 be closed a floodgate.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection range of the utility model should be limited appended claim.
Claims (5)
1. one kind is not had the power transformation system that is connected in parallel to by-pass switch on the spare unit low tension switch, it is characterized in that this system comprises:
Some transformers (1);
Some inlet wires (2), it is the input of each said transformer (1) of circuit connection respectively;
Bus (3), the output of some said transformers (1) circuit respectively are connected on this bus (3);
Some outlets (4), it is connected in parallel on the described bus (3);
Every described outlet (4) is gone up circuit and is connected with circuit breaker (5), and it is the low tension switch of no spare unit;
Be connected in parallel to by-pass switch (6) on the circuit breaker (5) of at least one said outlet (4).
2. be connected in parallel to the power transformation system of by-pass switch on the no spare unit low tension switch as claimed in claim 1, it is characterized in that, be connected in series with circuit breaker (5) between each described transformer (1) and the bus (3).
3. be connected in parallel to the power transformation system of by-pass switch on the no spare unit low tension switch as claimed in claim 1; It is characterized in that; Between the junction of every adjacent two transformers (1) and bus (3), described bus (3) is gone up circuit and is connected with circuit breaker (5).
4. be connected in parallel to the power transformation system of by-pass switch on the no spare unit low tension switch as claimed in claim 3, it is characterized in that, the two ends that are arranged at the described circuit breaker (5) on the bus (3) also respectively circuit be connected with 0.4 kilovolt of capacitor (7).
5. be connected in parallel to the power transformation system of by-pass switch on the no spare unit low tension switch as claimed in claim 1, it is characterized in that, described transformer (1) adopts 10 kilovolts of transformers that are depressurized to 0.4 kilovolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201266403U CN202534944U (en) | 2012-03-30 | 2012-03-30 | Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201266403U CN202534944U (en) | 2012-03-30 | 2012-03-30 | Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202534944U true CN202534944U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201266403U Expired - Lifetime CN202534944U (en) | 2012-03-30 | 2012-03-30 | Power transformation system with spare-free low-voltage switch connected in parallel with by-pass switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202534944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979758A (en) * | 2014-04-14 | 2015-10-14 | 施耐德电气工业公司 | Bypass device, drawing frame and distribution system |
-
2012
- 2012-03-30 CN CN2012201266403U patent/CN202534944U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979758A (en) * | 2014-04-14 | 2015-10-14 | 施耐德电气工业公司 | Bypass device, drawing frame and distribution system |
| CN104979758B (en) * | 2014-04-14 | 2018-01-26 | 施耐德电气工业公司 | Bypass apparatus, take out frame and distribution system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121114 |