CN109192569B - Control method for locking between three-station grounding switch and breaker opening - Google Patents
Control method for locking between three-station grounding switch and breaker opening Download PDFInfo
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- CN109192569B CN109192569B CN201811285842.0A CN201811285842A CN109192569B CN 109192569 B CN109192569 B CN 109192569B CN 201811285842 A CN201811285842 A CN 201811285842A CN 109192569 B CN109192569 B CN 109192569B
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- grounding switch
- circuit breaker
- circuit
- grounding
- opening
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- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a method for controlling the locking between a three-station grounding switch and a breaker opening, which comprises the following steps: firstly, a normally closed contact of a grounding switch is connected in series in an electric opening circuit of a circuit breaker; secondly, a normally closed contact of the circuit breaker is connected in series in a control loop of the grounding switch; and step three, switching on the grounding switch, disconnecting the normally closed contact of the grounding switch, disconnecting the electric brake-separating circuit of the circuit breaker, then switching on the circuit breaker, disconnecting the normally closed contact of the circuit breaker, disconnecting the circuit controlled by the grounding switch, and locking the brake-separating operation of the grounding switch. The invention provides a control method for locking between a three-station grounding switch and a breaker opening, which solves the problem that the grounding switch prevents the breaker from electrically mistakenly opening when maintaining a grounding state under the condition that a switch cabinet control loop is not powered off, and ensures safe and reliable grounding maintenance.
Description
Technical Field
The invention relates to a control method for locking between a three-station grounding switch and a breaker opening, belonging to the field of electrical control.
Background
At present, when a line cable side in a subway power supply system is maintained and overhauled, the circuit breaker is prevented from being subjected to electric error opening operation, as shown in fig. 1, a three-station grounding switch of a 40.5kV GIS switch cabinet is in an on-position state, when the circuit breaker is closed, the grounding switch is used for grounding the cable side, and when the circuit breaker is in an off-position state, the line side cannot be grounded. Therefore, when maintenance and repair are performed on the line cable side, it is necessary to prevent an electric erroneous opening operation from being performed on the circuit breaker. Fig. 3 shows a circuit breaker opening control loop, Q0-F is an opening coil, when the circuit breaker is in an open position, the normally closed contacts Q0-S1 of the circuit breaker are in an open position, and at this time, the circuit breaker can be electrically opened only by an opening command, so that the circuit side cannot be grounded.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a control method for locking between a three-station grounding switch and a breaker opening, so that the problem that the grounding switch is prevented from being electrically and mistakenly opened when the grounding state of the breaker is maintained under the condition that a switch cabinet control loop is not powered off is solved, and the safety and reliability of grounding maintenance are ensured.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for controlling locking between a three-position grounding switch and a breaker opening switch comprises the following steps:
firstly, a normally closed contact of a grounding switch is connected in series in an electric opening circuit of a circuit breaker;
secondly, a normally closed contact of the circuit breaker is connected in series in a control loop of the grounding switch;
and step three, switching on the grounding switch, disconnecting the normally closed contact of the grounding switch, disconnecting the electric brake-separating circuit of the circuit breaker, then switching on the circuit breaker, disconnecting the normally closed contact of the circuit breaker, disconnecting the circuit controlled by the grounding switch, and locking the brake-separating operation of the grounding switch.
Further, after the third step, pressing a manual opening button of the circuit breaker to open the circuit breaker.
By adopting the technical scheme, the normally closed contact of the grounding switch is only added in the electric opening circuit of the circuit breaker, the normally closed contact of the circuit breaker is connected in series in the grounding switch control circuit, other accessories are not required to be added, the circuit breaker is prevented from being electrically mistakenly opened under the condition that the switch cabinet control circuit is not powered off when the grounding is maintained, the operation is reliable and safe, and the field operation and maintenance are convenient.
Drawings
Fig. 1 is an electrical schematic diagram of a three-position grounding switch of a control method for locking between the three-position grounding switch and a breaker opening of the invention;
fig. 2 is an electrical schematic diagram of the electric opening circuit of the circuit breaker of the prior art of the present invention;
fig. 3 is an electrical schematic diagram of an improved circuit breaker electric opening circuit of the invention;
fig. 4 is an electrical schematic of the circuit breaker of the present invention with the earthing switch latched in operation when closed;
fig. 5 is a diagram of the electrical connections on the panel of the enclosure of the switchgear of the invention.
In the figure, 1, a manual closing button, 2, a manual opening button, 3, a counter, 4, an energy storage state indication, 5, an energy storage operation hole, 6, a grounding indication, 7, a grounding operation hole, 8, an isolation indication, 9, an isolation operation hole, 10, a grounding interlocking rod, 11, an isolation interlocking rod, 12, an opening and closing indication, 3031, an isolation switch, 3031E, an grounding switch, 303 and a circuit breaker.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 5, a method for controlling the locking between the three-position grounding switch and the opening of the circuit breaker includes the following steps:
step one, a normally closed contact Q8-S1 of an earthing switch is connected in series in an electric opening loop of a breaker;
secondly, a normally closed contact Q0-S1 of the circuit breaker is connected in series in a control loop of the grounding switch;
and step three, switching on the grounding switch, then switching on the circuit breaker, wherein the normally closed contact Q8-S1 of the grounding switch is disconnected, the electric brake-off loop of the circuit breaker is disconnected, at the moment, the circuit breaker cannot be electrically switched off, and meanwhile, the normally closed contact Q0-S1 of the circuit breaker is converted into a normally open state from a normally closed state, namely, the grounding switch controls the circuit to be disconnected and the grounding switch to be locked.
After the third step, when the maintenance grounding is removed, the manual brake-separating button of the circuit breaker is pressed to separate the circuit breaker, because the maintenance grounding is completed in field work, when the maintenance grounding can be removed, the manual brake-separating operation needs to be carried out on the circuit breaker in the field, meanwhile, the manual brake-separating button of the circuit breaker has a protection measure to prevent mistaken brake separation, and after the manual brake-separating circuit breaker is removed, the brake-separating operation is carried out on the grounding switch to remove the maintenance grounding, so that the operation in the whole process is safe and reliable.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for controlling locking between a three-position grounding switch and a breaker opening switch is characterized by comprising the following steps:
firstly, a normally closed contact of a grounding switch is connected in series in an electric opening circuit of a circuit breaker;
secondly, a normally closed contact of the circuit breaker is connected in series in a control loop of the grounding switch;
and step three, switching on the grounding switch, disconnecting the normally closed contact of the grounding switch, disconnecting the electric brake-separating circuit of the circuit breaker, then switching on the circuit breaker, disconnecting the normally closed contact of the circuit breaker, disconnecting the circuit controlled by the grounding switch, and locking the brake-separating operation of the grounding switch.
2. The method for controlling the locking between the three-position grounding switch and the opening of the circuit breaker according to claim 1, wherein the method comprises the following steps: and after the third step, pressing a manual opening button of the circuit breaker to open the circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285842.0A CN109192569B (en) | 2018-10-31 | 2018-10-31 | Control method for locking between three-station grounding switch and breaker opening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811285842.0A CN109192569B (en) | 2018-10-31 | 2018-10-31 | Control method for locking between three-station grounding switch and breaker opening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109192569A CN109192569A (en) | 2019-01-11 |
| CN109192569B true CN109192569B (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811285842.0A Active CN109192569B (en) | 2018-10-31 | 2018-10-31 | Control method for locking between three-station grounding switch and breaker opening |
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| Country | Link |
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| CN (1) | CN109192569B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601062A (en) * | 2019-10-11 | 2019-12-20 | 广东电网有限责任公司 | GIS combined electrical apparatus with status indicator lamp |
| CN111030056B (en) * | 2019-12-13 | 2021-10-08 | 张家港宏昌钢板有限公司 | Interlocking practice control method for preventing misoperation on two sides of circuit |
| CN112509850B (en) * | 2020-11-19 | 2023-02-10 | 广东电网有限责任公司 | Ground knife electric locking device and circuit interval with same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2823002B1 (en) * | 2001-03-30 | 2006-05-26 | Alstom | MULTIFUNCTIONAL SWITCH / DISCONNECT FOR AN ELECTRICAL DISTRIBUTION STATION |
| CN201868270U (en) * | 2010-11-15 | 2011-06-15 | 河南省电力公司濮阳供电公司 | Electric control disconnector operating mechanism latching circuit |
| US9754738B2 (en) * | 2014-11-04 | 2017-09-05 | Cooper Technologies Company | Network transformer primary disconnect assembly |
| CN107465175B (en) * | 2016-06-06 | 2019-08-20 | 上海勃继智能科技有限公司 | Prevent the microcomputer protecting device of maloperation |
| CN206004143U (en) * | 2016-08-17 | 2017-03-08 | 安徽华谊化工有限公司 | Transformer cabinet door safety interlock system |
| CN206283165U (en) * | 2016-12-16 | 2017-06-27 | 保定天威集团特变电气有限公司 | A kind of transformer neutral point earthing resistance cabinet |
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2018
- 2018-10-31 CN CN201811285842.0A patent/CN109192569B/en active Active
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| CN109192569A (en) | 2019-01-11 |
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