CN212063488U - Circuit breaker body three-phase inconsistent loop structure capable of preventing misoperation - Google Patents
Circuit breaker body three-phase inconsistent loop structure capable of preventing misoperation Download PDFInfo
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- CN212063488U CN212063488U CN202020988059.7U CN202020988059U CN212063488U CN 212063488 U CN212063488 U CN 212063488U CN 202020988059 U CN202020988059 U CN 202020988059U CN 212063488 U CN212063488 U CN 212063488U
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- 238000000034 method Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a three-phase inconsistent loop structure of a misoperation-preventing circuit breaker body, which comprises a time relay, an intermediate relay and a three-phase outlet pressing plate corresponding to a control power supply; the time delay contact of the time relay is connected with the intermediate relay to control the intermediate relay to work; the three-phase outlet pressure plate is respectively connected with three normally open contacts of the intermediate relay in series; a normally closed auxiliary switch is connected in series between the three-phase outlet pressure plate and the control power supply; the normally closed auxiliary switch comprises a three-phase normally closed auxiliary contact corresponding to the control power supply; one end of the three-phase normally closed auxiliary contact is respectively connected with the control power supply, and the other end of the three-phase normally closed auxiliary contact is connected with the three-phase outlet pressing plate after being connected in parallel. The utility model discloses an even if use makes the inconsistent return circuit of circuit breaker body three-phase and take place the outlet relay maloperation, can not cause the inconsistent return circuit of three-phase to miss the export yet, the potential safety hazard is eliminated to the reliability of great increase operation.
Description
Technical Field
The utility model relates to a circuit breaker manufacturing technology field, in particular to circuit breaker body three-phase inconsistent loop structure of preventing maloperation.
Background
In the prior art, 90% of the grid faults are single-phase instantaneous ground faults. Due to the consideration of power supply reliability, the circuit breakers with the voltage class of 220kV and above are generally operated in a split phase mode.
However, the circuit breaker of the split-phase operating mechanism may break one or two phases during operation, which causes three-phase inconsistency, resulting in large zero-sequence and negative-sequence currents, and if these zero-sequence and negative-sequence currents last for a long time, the zero-sequence protection override operation of the heavy-load line may be caused, so that the three-phase inconsistency protection of the circuit breaker needs to be installed, and the three-phase full-phase operation of the circuit breaker needs to be recovered.
However, in the three-phase inconsistent circuit structure of the circuit breaker body shown in fig. 1, the following several false actions may occur in practical applications:
1. condensation is formed in the control cubicle, and water drops are dripped into the interior of the three-phase inconsistent time relay to cause short-circuit tripping of a 'delay tripping contact';
2. the time relay connecting piece drops, and the node is normally opened to the short circuit export return circuit, leads to the action of export relay.
Therefore, the three-phase inconsistent circuit structure of the existing circuit breaker body needs to be improved, and the defects of the prior art are overcome.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a circuit breaker body three-phase inconsistent return circuit structure of preventing maloperation, even the purpose of realization is that the outlet relay maloperation can not cause the inconsistent return circuit mistake of three-phase to export yet, and the potential safety hazard is eliminated to the reliability of great increase operation.
In order to achieve the purpose, the utility model discloses a three-phase inconsistent loop structure of a misoperation-preventing circuit breaker body, which comprises a time relay, an intermediate relay and a three-phase outlet pressing plate corresponding to a control power supply; the time delay contact of the time relay is connected with the intermediate relay to control the intermediate relay to work; and the three phases of outlet pressure plates are respectively connected with three normally open contacts of the intermediate relay in series.
A normally closed auxiliary switch is connected in series between the three-phase outlet pressure plate and the three-phase power supply;
the normally closed auxiliary switch comprises three-phase normally closed auxiliary contacts corresponding to the three-phase power supply; and one end of the normally closed auxiliary contact is connected with the three phases of the power supply, and the other end of the normally closed auxiliary contact is connected with the three phases of the outlet pressing plate after being connected in parallel.
Preferably, the normally closed auxiliary switch further comprises three-phase normally open auxiliary contacts which correspond to the three-phase normally closed auxiliary contacts respectively and are linked with each other;
the three phases of the normally open auxiliary contacts are mutually connected in parallel to form two ends, one end of each normally open auxiliary contact is connected with a connection point between the three phases of the normally closed auxiliary contacts and the three phases of the outlet pressing plate, and the other end of each normally open auxiliary contact is connected with the time relay and the time delay contact to control the time relay and the time delay contact to work.
The utility model has the advantages that:
the utility model discloses an even if use makes the inconsistent return circuit of circuit breaker body three-phase and take place the outlet relay maloperation, can not cause the inconsistent return circuit of three-phase to miss the export yet, the potential safety hazard is eliminated to the reliability of great increase operation.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structure of the prior art.
Fig. 2 shows a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 2, the three-phase inconsistent loop structure of the misoperation-preventing circuit breaker body comprises a time relay 1, an intermediate relay 2 and a three-phase outlet pressure plate 3 corresponding to a control power supply 5; a delay contact 11 of the time relay 1 is connected with the intermediate relay 2 to control the operation of the intermediate relay 2; the three-phase outlet pressure plate 3 is respectively connected with three normally open contacts 21 of the intermediate relay 2 in series.
Wherein, a normally closed auxiliary switch 4 is connected in series between the three-phase outlet pressure plate 3 and the three-phase power supply 5;
the normally-closed auxiliary switch 4 includes a three-phase normally-closed auxiliary contact 41 corresponding to the three-phase power supply 5; one end of the three-phase normally closed auxiliary contact 41 is respectively connected with the three-phase power supply 5, and the other end is connected with the three-phase outlet pressing plate 3 after being connected in parallel.
The principle of the utility model lies in: the auxiliary contacts 4 are normally closed by stringing a three-phase non-uniform outlet circuit into the circuit breaker. When the switch is in an operating state, the three-phase normally-closed auxiliary contact 41 is disconnected, even if the outlet relay is in misoperation, the three-phase inconsistent loop is not mistakenly exported, and the operating reliability is greatly improved.
In some embodiments, the normally closed auxiliary switch 4 further includes three-phase normally open auxiliary contacts 42 corresponding to the three-phase normally closed auxiliary contacts 41, respectively, and linked with each other;
the three-phase normally-open auxiliary contacts 42 are connected in parallel to form two ends, one end of each three-phase normally-open auxiliary contact is connected with a connection point between the three-phase normally-closed auxiliary contact 41 and the three-phase outlet pressing plate 3, and the other end of each three-phase normally-open auxiliary contact is connected with the time relay 1 and the time delay contact 11 to control the time relay 1 and the time delay contact 11 to work.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (2)
1. The three-phase inconsistent circuit structure of the misoperation prevention circuit breaker body comprises a time relay (1), an intermediate relay (2) and a three-phase outlet pressing plate (3) corresponding to a control power supply (5); a delay contact (11) of the time relay (1) is connected with the intermediate relay (2) to control the intermediate relay (2) to work; the three-phase outlet pressure plate (3) is respectively connected with three normally open contacts (21) of the intermediate relay (2) in series; the method is characterized in that:
a normally closed auxiliary switch (4) is connected in series between the three-phase outlet pressure plate (3) and the three-phase power supply (5);
the normally closed auxiliary switch (4) comprises a three-phase normally closed auxiliary contact (41) corresponding to the three-phase power supply (5); and one end of the normally closed auxiliary contact (41) is respectively connected with the three phases of the power supply (5), and the other end of the normally closed auxiliary contact is connected with the three phases of the outlet pressing plate (3) in parallel.
2. The three-phase inconsistent circuit structure of the anti-malfunction circuit breaker body according to claim 1, wherein the normally closed auxiliary switch (4) further comprises three-phase normally open auxiliary contacts (42) corresponding to the three-phase normally closed auxiliary contacts (41) respectively and linked with each other;
the three phases of the normally open auxiliary contacts (42) are mutually connected in parallel to form two ends, one end of each normally open auxiliary contact is connected with the three phases of the normally closed auxiliary contacts (41) and the three phases of the connecting points between the outlet pressing plates (3), and the other end of each normally open auxiliary contact is connected with the time relay (1) and the delay contacts (11) to control the time relay (1) and the delay contacts (11) to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020988059.7U CN212063488U (en) | 2020-06-03 | 2020-06-03 | Circuit breaker body three-phase inconsistent loop structure capable of preventing misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020988059.7U CN212063488U (en) | 2020-06-03 | 2020-06-03 | Circuit breaker body three-phase inconsistent loop structure capable of preventing misoperation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212063488U true CN212063488U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020988059.7U Expired - Fee Related CN212063488U (en) | 2020-06-03 | 2020-06-03 | Circuit breaker body three-phase inconsistent loop structure capable of preventing misoperation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212063488U (en) |
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2020
- 2020-06-03 CN CN202020988059.7U patent/CN212063488U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |