CN111292981A - Power-off gas chain - Google Patents
Power-off gas chain Download PDFInfo
- Publication number
- CN111292981A CN111292981A CN201811164586.XA CN201811164586A CN111292981A CN 111292981 A CN111292981 A CN 111292981A CN 201811164586 A CN201811164586 A CN 201811164586A CN 111292981 A CN111292981 A CN 111292981A
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- CN
- China
- Prior art keywords
- breakers
- circuit
- breaker
- release
- closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/267—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of two out of three switches, e.g. two switches each connecting a power supply to a busbar and a bus coupling switch interlocked in such a way that the power supplies are never connected in parallel
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a power-off gas interlock, which comprises an electric interlock consisting of 3 circuit breakers, and a connection mode of an undervoltage release and a normally closed contact of an auxiliary contact of the circuit breaker; the invention has the beneficial effects that: the electrical interlocking of the under-voltage release and the auxiliary contact of the circuit breaker can simply and reliably solve the defects of the existing electrical interlocking and mechanical interlocking, the space of the distribution cabinet body is saved, and the production cost of the low-voltage distribution cabinet body is greatly reduced.
Description
Technical Field
The invention relates to the field of power supply equipment improvement, in particular to a power-off electric linkage.
Background
Along with the improvement of the national standard of living, the increase of electric equipment and the continuous increase of electric load, the reliability and the safety requirement of the electricity are higher and higher. The prior power supply mode of a single transformer or a circuit power supply cannot meet the use requirement, and two or more groups of power supplies are generally used for supplying power so as to ensure the continuous operation of power supply. In the power supply process, two groups of power supplies need to be separated to operate, and in order to prevent accidental parallel connection, electrical linkage needs to be arranged between every two incoming line switches and bus-coupled switches on each power supply side. At present, a plurality of electric interlocks are controlled by a PLC or a singlechip program, and connecting wires are complicated and complicated, so that the reliability is reduced and the cost is increased; or only a mechanical lock is arranged on the circuit breaker, the mechanical interlocking installation is limited by distance and direction, and the cost is high and the installation is inconvenient.
The circuit breaker plays an important role in an electrical control system as a main switch and a protection element of a power supply of the electrical control system such as a switch cabinet. In the existing electrical control system, a plurality of circuit breakers are used for switching control so as to ensure uninterrupted power supply. In order to ensure that the power supply circuits are separated and prevent accidental paralleling, an interlocking device is required to prevent accidents.
In the existing electric control system, various electric interlocking devices are available, but the defects of complex design, unreliable control and the like exist; the mechanical chain is inconvenient to install and has higher cost. The invention utilizes the electrical interlocking device of the undervoltage release and the auxiliary contact of the circuit breaker, and can simply and reliably solve the defects of the existing electrical interlocking and mechanical interlocking.
Disclosure of Invention
The invention aims to solve the problems and designs a combination of circuit breakers to realize electrical interlocking.
The invention relates to a power-off gas interlock, which comprises a series circuit formed by an under-voltage release of any one of 3 circuit breakers and normally closed auxiliary contacts connected in parallel with the other two circuit breakers; the function of electrical interlocking is realized through the effective combination of 3 under-voltage release devices and auxiliary contacts; normally open and normally closed are realized in the electrical interlocking of the 3 circuit breakers D1, D2 and D3, when the 3 circuit breakers are in an opening state, the normally closed contacts of the auxiliary contacts are in a closed state, so that the under-voltage release of the 3 circuit breakers are electrified and sucked, and at the moment, any one circuit breaker can be switched on; because the undervoltage release in any one breaker and the normally closed auxiliary contacts connected in parallel with the other two breakers form the electrical linkage of the series circuit in 3 breakers, the power supply of the undervoltage release of 2 breakers in the opening state is electrified and is in the closing state, and any one breaker in the two breakers can be closed; when 2 breakers are switched on among the 3 breakers, the undervoltage release of the 3 rd breaker is released after being powered off, and the iron core ejector rod of the undervoltage release pushes against a tripping half shaft of the breaker mechanism, so that the breaker cannot be switched on; only when one of the other two circuit breakers is opened, the normally closed contact of the auxiliary contact is closed, and the under-voltage release of the circuit breaker is closed, so that the opening operation can be carried out.
The electric linkage manufactured by the technical scheme of the invention realizes one normally open and two normally closed, and simply and reliably solves the defects of the existing electric linkage and mechanical linkage.
Drawings
Fig. 1 illustrates the electrical interlocking principle according to the present invention.
Detailed Description
The invention will be described in detail with reference to the accompanying drawings, in which fig. 1 is a schematic diagram of an electrical interlock for an under-voltage release according to the invention. As shown in the figure, one normally open and two normally closed are realized in the electrical interlocking of the 3 circuit breakers D1, D2 and D3, when the 3 circuit breakers are in the opening state, the normally closed contacts of the auxiliary contacts are in the closing state, so that the under-voltage release of the 3 circuit breakers are electrified and attracted, and at the moment, any one circuit breaker can be switched on. Because the undervoltage release in any one breaker and the normally closed auxiliary contacts connected in parallel with the other two breakers form the electrical linkage of the series circuit in 3 breakers, the power supply of the undervoltage release of 2 breakers in the opening state is electrified and is in the closing state, and any one breaker in the two breakers can be closed; when 2 circuit breakers are switched on in the 3 circuit breakers, the undervoltage release of the 3 rd circuit breaker is disconnected and released, and the iron core ejector rod of the undervoltage release pushes against a tripping half shaft of the circuit breaker mechanism, so that the circuit breaker cannot be switched on. Only when one of the other two circuit breakers is opened, the normally closed contact of the auxiliary contact is closed, and the under-voltage release of the circuit breaker is closed, so that the opening operation can be carried out. Thereby ensuring the separation operation of the circuit breaker and preventing accidents.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (1)
1. A kind of power-off gas chain, characterized by, include the undervoltage release of any one in 3 circuit breakers and another two circuit breakers normal close auxiliary contact that connect in parallel form the series circuit; the function of electrical interlocking is realized through the effective combination of 3 under-voltage release devices and auxiliary contacts; normally open and normally closed are realized in the electrical interlocking of the 3 circuit breakers D1, D2 and D3, when the 3 circuit breakers are in an opening state, the normally closed contacts of the auxiliary contacts are in a closed state, so that the under-voltage release of the 3 circuit breakers are electrified and sucked, and at the moment, any one circuit breaker can be switched on; because the undervoltage release in any one breaker and the normally closed auxiliary contacts connected in parallel with the other two breakers form the electrical linkage of the series circuit in 3 breakers, the power supply of the undervoltage release of 2 breakers in the opening state is electrified and is in the closing state, and any one breaker in the two breakers can be closed; when 2 breakers are switched on among the 3 breakers, the undervoltage release of the 3 rd breaker is released after being powered off, and the iron core ejector rod of the undervoltage release pushes against a tripping half shaft of the breaker mechanism, so that the breaker cannot be switched on; only when one of the other two circuit breakers is opened, the normally closed contact of the auxiliary contact is closed, and the under-voltage release of the circuit breaker is closed, so that the opening operation can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164586.XA CN111292981A (en) | 2018-10-06 | 2018-10-06 | Power-off gas chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811164586.XA CN111292981A (en) | 2018-10-06 | 2018-10-06 | Power-off gas chain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111292981A true CN111292981A (en) | 2020-06-16 |
Family
ID=71021915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811164586.XA Pending CN111292981A (en) | 2018-10-06 | 2018-10-06 | Power-off gas chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111292981A (en) |
-
2018
- 2018-10-06 CN CN201811164586.XA patent/CN111292981A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200616 |