CN218782942U - Three-breaker electric interlocking circuit for transfer switch electric appliance - Google Patents
Three-breaker electric interlocking circuit for transfer switch electric appliance Download PDFInfo
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- CN218782942U CN218782942U CN202222973206.5U CN202222973206U CN218782942U CN 218782942 U CN218782942 U CN 218782942U CN 202222973206 U CN202222973206 U CN 202222973206U CN 218782942 U CN218782942 U CN 218782942U
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Abstract
The utility model provides a three circuit breaker electrical interlock circuit for change over switch electrical apparatus relates to the electrical equipment field, include: the circuit breaker comprises a first driving module, a second driving module, a third driving module, a first circuit breaker, a second circuit breaker and a third circuit breaker; each driving module comprises 6 terminals of state indicating contacts, and the terminals are used for connecting other driving modules and corresponding circuit breakers; each circuit breaker includes the wiring end of 2 state indication contacts, and first circuit breaker connects first drive module, and the second circuit breaker connects the second drive module, and the third circuit breaker connects the third drive module. The utility model discloses make the drive module and the outside line of three circuit breaker unified, have redundant setting simultaneously, strengthened the reliability.
Description
Technical Field
The utility model relates to an electrical equipment field particularly, relates to a three circuit breaker electric interlock circuit for change over switch electrical apparatus.
Background
The transfer switching device has a plurality of use scenes, wherein two scenes are (1) a double-power-supply incoming line-bus coupler and (2) a three-power-supply incoming line, the two scenes are three circuit breakers, and the respective closing electric interlocking logics are the same. In the conventional electric interlocking circuit, although the interlocking logic is the same, the design of the driving modules of the three circuit breakers and related connecting lines are not unified in actual wiring and control, so that the manufacturing, construction and maintenance are difficult.
Therefore, how to optimize the existing electrical interlock circuit and improve the maintenance convenience thereof becomes a technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the above-mentioned prior art or the correlation technique at least, provide a three circuit breaker electric interlock circuit for change over switch electrical apparatus, make the drive module and the outside line of three circuit breaker unified, promoted the maintenance convenience of circuit, had redundant setting simultaneously, strengthened the reliability.
The utility model discloses a realize through following technical scheme: a three circuit breaker electrical interlock circuit for a transfer switching apparatus comprising: the circuit breaker comprises a first driving module, a second driving module, a third driving module, a first circuit breaker, a second circuit breaker and a third circuit breaker; each driving module comprises 6 terminals of state indicating contacts, and the terminals are used for connecting other driving modules and corresponding circuit breakers; each circuit breaker comprises 2 wiring terminals of state indication contacts, the first circuit breaker is connected with the first driving module, the second circuit breaker is connected with the second driving module, and the third circuit breaker is connected with the third driving module; the 6 terminals of the first driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the first circuit breaker, the other two terminals are connected with the second driving module and the third driving module, one of the 3 terminals in the second group is connected with the other terminal of the first circuit breaker, and the other two terminals are connected with the second driving module and the third driving module; the 6 terminals of the second driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the second circuit breaker, the other two terminals are connected with the first driving module and the third driving module, one of the 3 terminals in the second group is connected with the other terminal of the second circuit breaker, and the other two terminals are connected with the first driving module and the third driving module; the 6 terminals of the third driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the third circuit breaker, the other two terminals are connected with the first driving module and the second driving module, one of the 3 terminals in the second group is connected with the other terminal of the third circuit breaker, and the other two terminals are connected with the first driving module and the second driving module.
According to the utility model provides a three circuit breaker electric interlock circuit for change over switch electrical apparatus, preferably, first drive module directly links first circuit breaker, and first drive module passes through the second drive module and connects the second circuit breaker, and first drive module passes through the third drive module and connects the third circuit breaker to acquire the instruction contact state of 3 circuit breakers.
According to the utility model provides a three circuit breaker electric interlock circuit for change over switch electrical apparatus, preferably, second drive module directly links the second circuit breaker, and first circuit breaker is connected through first drive module to second drive module, and third circuit breaker is connected through third drive module to second drive module to the instruction contact state that acquires 3 circuit breakers.
According to the utility model provides a three circuit breaker electric interlock circuit for change over switch electrical apparatus, preferably, third drive module directly links the third circuit breaker, and second circuit breaker is connected through second drive module to third drive module, and first circuit breaker is connected through first drive module to the third drive module to acquire the instruction contact state of 3 circuit breakers.
The utility model discloses the beneficial effect who gains includes at least: the driving modules and the connecting wires of the three circuit breakers are the same, so that the difficulty in manufacturing, constructing and maintaining is greatly reduced. Meanwhile, the redundancy configuration is provided, and the reliability is enhanced.
Drawings
Fig. 1 shows a schematic structural diagram of a three-breaker electrical interlock circuit for a transfer switching apparatus according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of a closing interlock circuit of a circuit breaker a for a three-circuit breaker electrical interlock circuit of a transfer switching apparatus according to an embodiment of the present invention.
Fig. 3 shows a switching interlock circuit schematic diagram of a circuit breaker a for a three-breaker electrical interlock circuit of a transfer switching apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in fig. 1, the utility model provides a three circuit breaker electric interlock circuit for change over switch electrical apparatus, include: the circuit breaker comprises a driving module A, a driving module B, a driving module C, a circuit breaker A, a circuit breaker B and a circuit breaker C; each drive module comprises terminals of 6 state indication contacts (in the figure, connection objects of the terminals are marked in 6 grids representing the terminals, the first three grids are a first group of terminals, and the last three grids are a second group of terminals), and the terminals are used for connecting other drive modules and corresponding circuit breakers; each circuit breaker comprises 2 wiring terminals of state indicating contacts, the circuit breaker A is connected with the driving module A, the circuit breaker B is connected with the driving module B, and the circuit breaker C is connected with the driving module C; the 6 terminals of the driving module A are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the breaker A, the other two terminals are connected with the driving module B and the driving module C, one of the 3 terminals in the second group is connected with the other terminal of the breaker A, and the other two terminals are connected with the driving module B and the driving module C; the 6 terminals of the driving module B are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the breaker B, the other two terminals are connected with the driving module A and the driving module C, one of the 3 terminals in the second group is connected with the other terminal of the breaker B, and the other two terminals are connected with the driving module A and the driving module C; the 6 terminals of the driving module C are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the breaker C, the other two terminals are connected with the driving module A and the driving module B, one of the 3 terminals in the second group is connected with the other terminal of the breaker C, and the other two terminals are connected with the driving module A and the driving module B.
In this embodiment, a three-breaker electrical interlock circuit for a transfer switching apparatus includes three identical drive modules, three identical drive modules interconnecting harnesses (harness 1, harness 2, harness 3), three identical drive modules to harnesses of a breaker (harness 4, harness 5, harness 6), six status indicating contacts (two per circuit breaker, three circuit breakers for six contacts, which may be either a normally closed or a normally open contact). There are six terminals on each drive module.
The driving modules are interconnected through wire harnesses 1-3; the wire harnesses 1 to 3 are all of a cross structure as shown in fig. 1. This cross-over arrangement makes it possible to connect exactly the three terminals of the first group of each drive module to the indicating contacts 2 of three circuit breakers, respectively. Likewise, the three terminals of the second group of each drive module are also connected to the indicating contacts 1 of the three circuit breakers, respectively. In this way, each drive module has the indicated contact status of all circuit breakers, and there is neither signal omission nor short circuit. If only the electrical interlocking function is realized, only any two of the wiring harnesses 1-3 are used, the third wiring harness is used as a redundant configuration, the reliability of the system is enhanced in actual use, and the electrical interlocking cannot fail when any one of the interconnection wiring harnesses is broken.
In the use condition of a double-power-supply inlet wire-bus coupler, the logic of switching on a certain breaker is that at least one of the other two breakers is switched off. In the service condition of three power supply incoming lines, the logic of switching on a certain breaker is that two outer breakers are both switched off. In both cases, the state of the indicating contacts of the other two breakers needs to be taken: taking the breaker a as an example, the composition of the closing interlock circuit is as shown in fig. 2, and the composition and principle of the interlock circuits of other breakers are completely the same. The driver module takes only one of its first set of terminals and only one of its second set of terminals. The drive module has taken the instruction contact of two other circuit breakers, satisfies the interlocking function requirement, and all drive module's circuit is the same with the wiring moreover, has still guaranteed that every instruction contact is only used once.
According to different use conditions and different types of indication contacts (normally open points or normally closed points), the closing control circuit in the driving module is correspondingly adjusted. For example, the use condition of a dual-power inlet wire-bus coupler is used, a switching-on control circuit is made into OR logic, the schematic diagram of the switching-on control circuit is shown in figure 3, and when at least one of the breaker B or the breaker C is switched off, the breaker A can be switched on.
The concepts and principles of the present electrical interlock circuit can be extended and applied to the control of more circuit breakers, as appropriate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A three circuit breaker electrical interlock circuit for a transfer switching apparatus, comprising: the circuit breaker comprises a first driving module, a second driving module, a third driving module, a first circuit breaker, a second circuit breaker and a third circuit breaker; each driving module comprises 6 terminals of state indicating contacts, and the terminals are used for connecting other driving modules and corresponding circuit breakers; each circuit breaker comprises 2 wiring terminals of state indicating contacts, the first circuit breaker is connected with the first driving module, the second circuit breaker is connected with the second driving module, and the third circuit breaker is connected with the third driving module;
the 6 terminals of the first driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the first circuit breaker, the other two terminals are connected with the second driving module and the third driving module, one of the 3 terminals in the second group is connected with the other terminal of the first circuit breaker, and the other two terminals are connected with the second driving module and the third driving module;
the 6 terminals of the second driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the second circuit breaker, the other two terminals are connected with the first driving module and the third driving module, one of the 3 terminals in the second group is connected with the other terminal of the second circuit breaker, and the other two terminals are connected with the first driving module and the third driving module;
the 6 terminals of the third driving module are divided into two groups, one of the 3 terminals in the first group is connected with one of the terminals of the third circuit breaker, the other two terminals are connected with the first driving module and the second driving module, one of the 3 terminals in the second group is connected with the other terminal of the third circuit breaker, and the other two terminals are connected with the first driving module and the second driving module.
2. The electrical interlock circuit for a transfer switch apparatus with three circuit breakers of claim 1, wherein the first driving module is directly connected to the first circuit breaker, the first driving module is connected to the second circuit breaker through the second driving module, and the first driving module is connected to the third circuit breaker through the third driving module to obtain the indication contact states of the 3 circuit breakers.
3. The electrical interlock circuit for a transfer switch apparatus with three circuit breakers of claim 1, wherein the second driving module is directly connected to the second circuit breaker, the second driving module is connected to the first circuit breaker through the first driving module, and the second driving module is connected to the third circuit breaker through the third driving module to obtain the indication contact states of the 3 circuit breakers.
4. The electrical interlock circuit for a transfer switch apparatus with three circuit breakers of claim 1, wherein the third driving module is directly connected to the third circuit breaker, the third driving module is connected to the second circuit breaker through the second driving module, and the third driving module is connected to the first circuit breaker through the first driving module to obtain the indicating contact states of the 3 circuit breakers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222973206.5U CN218782942U (en) | 2022-11-09 | 2022-11-09 | Three-breaker electric interlocking circuit for transfer switch electric appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222973206.5U CN218782942U (en) | 2022-11-09 | 2022-11-09 | Three-breaker electric interlocking circuit for transfer switch electric appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218782942U true CN218782942U (en) | 2023-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222973206.5U Active CN218782942U (en) | 2022-11-09 | 2022-11-09 | Three-breaker electric interlocking circuit for transfer switch electric appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218782942U (en) |
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2022
- 2022-11-09 CN CN202222973206.5U patent/CN218782942U/en active Active
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