CN216597330U - Double-vacuum-tube double-resistance on-load tap-changer transition circuit - Google Patents
Double-vacuum-tube double-resistance on-load tap-changer transition circuit Download PDFInfo
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- CN216597330U CN216597330U CN202122750738.8U CN202122750738U CN216597330U CN 216597330 U CN216597330 U CN 216597330U CN 202122750738 U CN202122750738 U CN 202122750738U CN 216597330 U CN216597330 U CN 216597330U
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Abstract
The utility model relates to an on-load tap-changer transition circuit which comprises a tap n, a tap n +1 and a current output end X, wherein a main contact M1 is connected between the tap n and the current output end X, a current-limiting transition resistor R1 and an isolating switch X1 are sequentially connected between the tap n and the current output end X, a main contact M2 is connected between the tap n +1 and the current output end X, a current-limiting transition resistor R2 and an isolating switch X2 are sequentially connected between the tap n +1 and the current output end X, the tap n is connected with an isolating static contact G1, the tap n +1 is connected with an isolating static contact G2, a left end of a vacuum tube V1 is connected between the current-limiting transition resistor R1 and the isolating switch X1, and an isolating static contact Q1 is connected between the current-limiting transition resistor R2 and the isolating switch X2. The beneficial effects of the utility model are: the two vacuum tubes are definite in division of labor, the problem of asymmetry in switching of the vacuum tubes is solved, and the on-off task of the isolating switch is reduced.
Description
Technical Field
The utility model relates to a switching circuit of an on-load tap-changer, in particular to a double-vacuum-tube double-resistance on-load tap-changer transition circuit.
Background
With the common application of the vacuum on-load tap-changer technology, the vacuum on-load tap-changer of the vacuum bubble has a necessary trend to replace the traditional mechanical contact on-load tap-changer, and solves the problems of contact burning loss and oil pollution of the traditional mechanical contact on-load tap-changer, thereby greatly prolonging the service life of the switch and prolonging the maintenance period of the switch. The switching circuits of the vacuum on-load tap-changer are many, and mainly take four vacuum tube double resistors, two vacuum tube single resistors and two vacuum tube double resistors as mainstream products. The double-vacuum-tube double-resistor circuit of the vacuum switch on the market is shown in fig. 1, and the switching circuit comprises two main contacts K1 and K2, two vacuum tubes V1 and V2, two current-limiting transition resistors R1 and R2, two isolating switches U1 and U2, wherein each isolating switch comprises two contact points U11 and U12, and U21 and U22. The main contact K1 is connected to the n and current outputs, the main contact K2 is connected to the n +1 and current outputs, the isolation contact U1 is connected to the upper end of the vacuum tube V1, the U11 is connected to the n end of the tap, and the U12 is connected to the n +1 end of the tap through the transition resistor R2. An isolation contact U2 is connected to the upper end of vacuum tube V2, U21 is connected to the n end of the tap through a transition resistor R1, and U22 is connected to the n +1 end of the tap. Vacuum tube V1 has an upper end connected to isolation contact U1 and a lower end connected to a current output terminal. Vacuum tube V2 is connected at its upper end to isolation contact U2 and at its lower end to the current output. The vacuum tubes V1 and V2 not only cut off the rated current of the transformer in the switching process, but also cut off the combined current formed by the rated current of the transformer and the circulating current, the cut-off current of the vacuum tubes in the switching process is asymmetric left and right, the vacuum tubes are designed according to the maximum switching capacity, the design cost is high, and once the vacuum tubes are failed, the switching capacity burden of the subsequent isolation contacts is heavy, and the switch design is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to make up for the defects of the prior art, the utility model provides a double-vacuum-tube double-resistor on-load tap-changer transition circuit which has the advantages of clear vacuum tube division, symmetrical vacuum tube switching, light on-off task of an isolating switch, safety and reliability.
The utility model is realized by the following technical scheme:
the utility model provides a two vacuum tube double resistance on-load tap-changer transition circuit, includes tap n, tap n +1 and current output end X, characterized by: the main contact M1 is connected between the tap n and the current output end X, the current-limiting transition resistor R1 and the isolating switch X1 are sequentially connected between the tap n and the current output end X, the main contact M2 is connected between the tap n +1 and the current output end X, the current-limiting transition resistor R2 and the isolating switch X2 are sequentially connected between the tap n +1 and the current output end X, the isolating static contact G1 is connected to the tap n, the isolating static contact G2 is connected to the tap n +1, the left end of the vacuum tube V1 is connected between the current-limiting transition resistor R1 and the isolating switch X1, the isolating movable contact Q is connected to the right end of the vacuum tube V1, the isolating static contact Q vacuum tube 1 is connected between the current-limiting transition resistor R2 and the isolating switch X2, the lower end of the current output end X is connected to the vacuum tube V2, and the upper end of the vacuum tube V2 is connected to the isolating movable contact G.
The utility model has the beneficial effects that: the switching task between the tapping taps of the transformer can be completed only by using two current-limiting resistors of two vacuum tubes, one vacuum tube is disconnected with rated current, and the other vacuum tube is disconnected with bridging circulating current, so that the division of labor is clear, the problem of asymmetrical switching of the vacuum tubes in the prior art is solved, the task of disconnecting the isolating switch caused by failure of the vacuum tubes is reduced, and the switching task is more reliable.
Drawings
The utility model will be further described with reference to the accompanying drawings.
FIG. 1 is a transition circuit diagram of a double-vacuum tube double-resistor on-load tap-changer in the prior art;
FIG. 2 is a transition circuit diagram of a double-vacuum tube double-resistor on-load tap-changer of the utility model;
FIG. 3 is a circuit diagram of embodiment 1 of the present invention;
FIG. 4 is a circuit diagram of embodiment 2 of the present invention;
FIG. 5 is a circuit diagram of embodiment 3 of the present invention;
FIG. 6 is a circuit diagram of embodiment 4 of the present invention;
FIG. 7 is a circuit diagram of embodiment 5 of the present invention;
FIG. 8 is a circuit diagram of embodiment 6 of the present invention;
FIG. 9 is a circuit diagram of embodiment 7 of the present invention;
FIG. 10 is a circuit diagram of embodiment 8 of the present invention;
FIG. 11 is a circuit diagram of embodiment 9 of the present invention;
fig. 12 is a circuit diagram of embodiment 10 of the present invention.
Detailed Description
The attached drawing is an embodiment of the utility model. The embodiment comprises a tap n, a tap n +1 and a current output end X, and is characterized in that: the main contact M1 is connected between the tap n and the current output end X, the current-limiting transition resistor R1 and the isolating switch X1 are sequentially connected between the tap n and the current output end X, the main contact M2 is connected between the tap n +1 and the current output end X, the current-limiting transition resistor R2 and the isolating switch X2 are sequentially connected between the tap n +1 and the current output end X, the isolating static contact G1 is connected to the tap n, the isolating static contact G2 is connected to the tap n +1, the left end of the vacuum tube V1 is connected between the current-limiting transition resistor R1 and the isolating switch X1, the isolating movable contact Q is connected to the right end of the vacuum tube V1, the isolating static contact Q vacuum tube 1 is connected between the current-limiting transition resistor R2 and the isolating switch X2, the lower end of the current output end X is connected to the vacuum tube V2, and the upper end of the vacuum tube V2 is connected to the isolating movable contact G.
The transition circuit of the double-vacuum-tube double-resistor on-load tap-changer provided by the utility model specifically comprises the following embodiments:
example 1
Firstly, closing a main contact M1; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; fourthly, the isolation moving contact Q is disconnected with the isolation static contact Q1; closing the isolating switch X1, and opening the isolating switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is closed.
The current of the tap n on the tapping side of the transformer flows to the current output terminal X through the main contact M1.
Example 2
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; closing the isolating switch X1, and opening the isolating switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is closed.
The current of the tapping point n on the tapping side of the transformer flows to the current output end X through the isolation static contact G1, the isolation moving contact G and the vacuum tube V2.
Example 3
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; closing the isolating switch X1, and opening the isolating switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is broken.
The current of the tap n on the tapping side of the transformer flows through the current-limiting transition resistor R1, and the isolating switch X1 flows to the current output end X.
Example 4
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; closing the isolating switch X1, and opening the isolating switch X2; closing vacuum tube V1; vacuum tube V2 is broken.
The current of the tap n on the tapping side of the transformer flows through the current-limiting transition resistor R1, and the isolating switch X1 flows to the current output end X.
The current of a tap n +1 on the tapping side of the transformer flows to a current output end X through a current-limiting transition resistor R2, an isolation static contact Q1, an isolation moving contact Q, a vacuum tube V1 and an isolation switch X1.
A circulating current is formed between tap n and tap n + 1.
Example 5
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; closing the isolating switch X1 and closing the isolating switch X2; closing vacuum tube V1; vacuum tube V2 is broken.
The current of the tapping point n on the tapping side of the transformer flows to the current output end X through two loops: the loop a flows to the current output end X through the current-limiting transition resistor R1 and the isolating switch X1; the loop b flows to the current output end X through a current-limiting transition resistor R1, a vacuum tube V1, an isolation moving contact Q, an isolation static contact Q1 and an isolation switch X2.
The current of the tapping n +1 at the tapping side of the transformer flows to the current output end X through two loops: the loop a flows to a current output end X through a current-limiting transition resistor R2, an isolation static contact Q1, an isolation moving contact Q, a vacuum tube V1 and an isolation switch X1; the loop b flows to the current output terminal X through the current limiting transition resistor R2 and the isolating switch X2.
A circulating current is formed between tap n and tap n + 1.
Example 6
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; disconnecting switch X1 and disconnecting switch X2; closing vacuum tube V1; vacuum tube V2 is broken.
The current of the tap n on the tapping side of the transformer flows to the current output end X through the current-limiting transition resistor R1, the vacuum tube V1, the isolation moving contact Q and the isolation static contact Q1, and the isolation switch X2.
The current of the tap n +1 on the tapping side of the transformer flows through the current-limiting transition resistor R2, and the isolating switch X2 flows to the current output end X.
Example 7
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; the isolation moving contact G and the isolation static contact G1 are closed, and the isolation static contact G2 is disconnected; closing the isolation moving contact Q and the isolation static contact Q1; disconnecting switch X1 and disconnecting switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is broken.
The current of the tap n +1 on the tapping side of the transformer flows through the current-limiting transition resistor R2, and the isolating switch X2 flows to the current output end X.
Example 8
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; thirdly, the isolation moving contact G is disconnected from the isolation static contact G1, and the isolation static contact G2 is closed; closing the isolation moving contact Q and the isolation static contact Q1; disconnecting switch X1 and disconnecting switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is broken.
The current of the tap n +1 on the tapping side of the transformer flows through the current-limiting transition resistor R2, and the isolating switch X2 flows to the current output end X.
Example 9
Firstly, the main contact M1 is disconnected; the main contact M2 is disconnected; thirdly, the isolation moving contact G is disconnected from the isolation static contact G1, and the isolation static contact G2 is closed; closing the isolation moving contact Q and the isolation static contact Q1; disconnecting switch X1 and disconnecting switch X2; sixthly, the vacuum tube V1 is disconnected; vacuum tube V2 is closed.
The current of the tap n +1 on the tapping side of the transformer flows to the current output end X through the isolation static contact G2 and the isolation moving contact G, and the vacuum tube V2.
Example 10
Firstly, the main contact M1 is disconnected; the main contact M2 is closed; thirdly, the isolation moving contact G is disconnected from the isolation static contact G1, and the isolation static contact G2 is closed; fourthly, the isolation moving contact Q is disconnected with the isolation static contact Q1; disconnecting switch X1 and disconnecting switch X2; sixthly, disconnecting the vacuum tube V1; vacuum tube V2 is closed.
The current of the tap n +1 on the tapping side of the transformer flows through the main contact M2 to the current output terminal X.
It can be seen from the above whole switching process that the vacuum tube V1 in the loop only cuts off the circulating current between the tap n and the tap n +1 when the bridge is bridged, the vacuum tube V2 in the loop only cuts off the rated current tapped by the transformer, and the vacuum tube V1 and the vacuum tube V2 have definite division.
The conversion from the transformer tap n to the tap n +1 is realized through the single vacuum tube double-resistor circuit in the process, and the reverse process can be realized if the conversion is carried out from the transformer tap n +1 to the tap n.
Claims (1)
1. The utility model provides a two vacuum tube double resistance on-load tap-changer transition circuit, includes tap n, tap n +1 and current output end X, characterized by: the main contact M1 is connected between the tap n and the current output end X, the current-limiting transition resistor R1 and the isolating switch X1 are sequentially connected between the tap n and the current output end X, the main contact M2 is connected between the tap n +1 and the current output end X, the current-limiting transition resistor R2 and the isolating switch X2 are sequentially connected between the tap n +1 and the current output end X, the isolating static contact G1 is connected to the tap n, the isolating static contact G2 is connected to the tap n +1, the left end of the vacuum tube V1 is connected between the current-limiting transition resistor R1 and the isolating switch X1, the isolating movable contact Q is connected to the right end of the vacuum tube V1, the isolating static contact Q vacuum tube 1 is connected between the current-limiting transition resistor R2 and the isolating switch X2, the lower end of the current output end X is connected to the vacuum tube V2, and the upper end of the vacuum tube V2 is connected to the isolating movable contact G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122750738.8U CN216597330U (en) | 2021-11-11 | 2021-11-11 | Double-vacuum-tube double-resistance on-load tap-changer transition circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122750738.8U CN216597330U (en) | 2021-11-11 | 2021-11-11 | Double-vacuum-tube double-resistance on-load tap-changer transition circuit |
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| Publication Number | Publication Date |
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| CN216597330U true CN216597330U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122750738.8U Active CN216597330U (en) | 2021-11-11 | 2021-11-11 | Double-vacuum-tube double-resistance on-load tap-changer transition circuit |
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| Country | Link |
|---|---|
| CN (1) | CN216597330U (en) |
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2021
- 2021-11-11 CN CN202122750738.8U patent/CN216597330U/en active Active
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