CN111681920B - Circuit breaker contact system with touch finger spring force monitoring function - Google Patents
Circuit breaker contact system with touch finger spring force monitoring function Download PDFInfo
- Publication number
- CN111681920B CN111681920B CN202010434179.7A CN202010434179A CN111681920B CN 111681920 B CN111681920 B CN 111681920B CN 202010434179 A CN202010434179 A CN 202010434179A CN 111681920 B CN111681920 B CN 111681920B
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- China
- Prior art keywords
- contact
- circuit breaker
- pressure sensor
- spring
- finger
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Breakers (AREA)
Abstract
The invention provides a circuit breaker contact system with a contact finger spring force monitoring function, which is characterized in that a contact support is provided with a cavity, a pressure sensor is arranged in the cavity, one end of a contact spring is just pressed in a corresponding working area of the pressure sensor, the pressure sensor is connected with an external controller through an output lead, and the contact spring always acts on the corresponding working area of the pressure sensor. The invention has the advantages that: the structure is simple, the parts are few, and the installation is convenient; the installation is hidden and is not influenced by breaking arc and temperature rise of the contact; the principle is simple and easy to implement, and engineering is convenient.
Description
Technical Field
The invention relates to a frame-type breaker contact system with a contact finger spring force monitoring function, and belongs to the field of piezoelectric devices.
Background
The frame-type circuit breaker is an important component in a low-voltage distribution system, is usually used as a main inlet switch or a main branch switch, is used for distributing electric energy in a distribution network, and is used for protecting circuits, power supply equipment and the like, so that the damage of faults such as overload, undervoltage, short circuit, single-phase grounding and the like is avoided. The existing frame-type breaker contact system mainly comprises parts such as a contact support, a contact spring, a rotating shaft, a fastener, a bracket, a bus, a fixed clamping plate, a contact finger, a contact, a connecting rod and the like. When the circuit breaker works in a power distribution circuit, the moving contact of the circuit breaker is required to be connected with larger normal current or short circuit and overload current, so that the moving contact of the circuit breaker needs a certain final pressure to overcome the electric repulsive force generated by the current, the pressure of the contact finger of the contact system is provided by the contact spring arranged in the contact support, and therefore, the pressure value of the contact spring is a very critical parameter in the normal operation process of the circuit breaker. The contact spring pressure comprehensively reflects the states of the contact system, such as the temperature around the contact fingers of the contact system, contact wear or/and burning loss, the installation state of the contact spring and the like. The contact support is generally molded integrally from a flame retardant insulating plastic material with a spring-mounting aperture therein.
In the prior art, a structural device for directly monitoring the pressure of the contact spring is not available, and the change condition of the pressure of the contact spring and the working state of the circuit breaker cannot be monitored in real time. The contact system of the circuit breaker, especially the pressure condition of the main contact, directly influences whether the circuit breaker can be used normally or not, so that the value or the value change of the contact spring pressure of the contact system of the circuit breaker can be directly reflected to have great significance.
Disclosure of Invention
The purpose of the invention is that: a circuit breaker contact system capable of directly reflecting the value or value change of the contact spring pressure.
In order to achieve the above purpose, the technical scheme of the invention provides a circuit breaker contact system with a contact finger spring force monitoring function, which comprises a contact support, wherein a spring mounting hole is arranged in the contact support, one end of a contact spring is arranged in the spring mounting hole, the other end of the contact spring is fixedly connected with a contact finger arranged on a fixed clamping plate, the contact finger can rotate around a rotating shaft on the fixed clamping plate, and the fixed clamping plate is arranged on the contact support.
Preferably, the cavity is arranged in a coupled manner with the bottom of the spring mounting hole.
Preferably, when the external controller calculates the signals, the real-time signals obtained by the pressure sensor are compared with an internal preset rated value or initial value and a minimum value or final value, and the residual life value or residual life percentage value of the circuit breaker contact system is quantitatively displayed in real time.
Preferably, the external controller is further connected with an early warning system for reminding a user of timely replacing the circuit breaker with the service life of the circuit breaker contact system close to the end value of the full life cycle.
Preferably, the contact support is provided with a wiring groove for facilitating wiring of the output wires, and the wiring groove is connected with the cavity.
The invention can provide a circuit breaker contact system with a contact finger spring force monitoring function, a pressure sensor can be arranged in the circuit breaker contact system, the pressure value or the value change condition of a contact system spring can be intuitively monitored in real time through the real-time output of the sensor, the running state of the contact system and the circuit breaker thereof is directly reflected, the service life cycle of the contact system can be quantitatively monitored to a certain extent, and a user can conveniently replace the circuit breaker with the operation times close to the end of the full life cycle in time. The invention can better monitor the use state and the service life cycle condition of the circuit breaker, improves the safety and the stability of the power distribution system, and brings convenience to daily inspection, maintenance and replacement of the circuit breaker.
The invention has the advantages that:
1) The structure is simple, the parts are few, and the installation is convenient;
2) The installation is hidden and is not influenced by breaking arc and temperature rise of the contact;
3) The principle is simple and easy to implement, and engineering is convenient.
Drawings
FIG. 1 is a diagram of a contact support structure for a contact system of the present invention;
FIG. 2 is a schematic diagram of a sensor;
FIG. 3 is a schematic view of a contact spring and sensor installation;
fig. 4 is a diagram of a contact system of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
As shown in fig. 4, the circuit breaker contact system provided by the invention comprises a contact support 1, a pressure sensor 2, a contact spring 3, a rotating shaft 4, a fastener 5, a bracket 6, a bus 7, a fixed clamping plate 8, a contact finger 9, a contact 10 and other parts.
The contact support 1 is generally molded integrally from a flame retardant insulating plastic and has spring mounting holes 13 therein for mounting the contact springs 3. At the same time, the contact support 1 of the invention has a cavity 11 for mounting the pressure sensor 2, the cavity 11 is arranged in a coupling way with the bottom of the spring mounting hole 13, the pressure sensor 2 is mounted in the cavity 11, and one end of the contact spring 3 is just pressed on the corresponding working area 21 of the pressure sensor 2.
The contact support 1 is provided with a wiring groove 12 which is convenient for wiring an output wire 22, and the pressure sensor 2 is connected with an external controller through the output wire 22. The wiring groove 12 is connected with the cavity 11. The contact spring 3 and the pressure sensor 2 are installed in the contact support 1 as shown in fig. 3 and 4, and the contact spring 3 is pressed against one side of the contact finger 9, so that the contact finger 9 can freely rotate around the rotation shaft 4. The contact spring 3 always acts on the corresponding working area 21 of the pressure sensor 2, and the compression amount of the contact spring 3 is changed along with the change of the rotation angle of the contact finger 9, so that the pressure of the contact spring 3 on the corresponding working area 21 of the pressure sensor 2 is changed along with the change of the compression amount, and the pressure sensor 2 can output a signal (such as a voltage signal) corresponding to the pressure of the contact spring 3 one by one in real time. And after the operation of the external controller, comparing the real-time signal with an internal preset rated value (or initial value) and a minimum value (or final value), and quantitatively displaying the residual life value (or residual life percentage value) of the contact system in real time. The technical personnel in the field can also set an early warning system to remind a user to replace the breaker with the service life of the contact system of the breaker close to the end value of the full life cycle in time.
Claims (5)
1. A circuit breaker contact system with a contact finger spring force monitoring function comprises a contact support (1), wherein a spring mounting hole (13) is formed in the contact support (1), one end of a contact spring (3) is mounted in the spring mounting hole (13), the other end of the contact spring is fixedly connected with a contact finger (9) arranged on a fixed clamping plate (8), the contact finger (9) can rotate around a rotating shaft (4) on the fixed clamping plate (8), the fixed clamping plate (8) is arranged on the contact support (1), the circuit breaker contact system is characterized in that the contact support (1) is provided with a cavity (11), a pressure sensor (2) is arranged in the cavity (11), one end of the contact spring (3) is just pressed in a corresponding working area (21) of the pressure sensor (2), the pressure sensor (2) is connected with an external controller through an output lead (22), the contact spring (3) always acts on the corresponding working area (21) of the pressure sensor (2), the rotation angle of the contact finger (9) changes, the compression amount of the contact spring (3) is caused to change, accordingly, the pressure sensor (3) is pressed in the corresponding working area (21) of the pressure sensor (2), the pressure sensor (2) changes, the pressure sensor (3) is controlled to change in real time, and then the signal is output through the signal change in real time, the remaining life value or the remaining life percentage value of the circuit breaker contact system is quantitatively displayed in real time.
2. A circuit breaker contact system with finger spring force monitoring function according to claim 1, characterized in that the cavity (11) is arranged in coupling with the bottom of the spring mounting hole (13).
3. A circuit breaker contact system with finger spring force monitoring according to claim 1, characterized in that the external controller, when operating on the signals, compares the real-time signal obtained by the pressure sensor (2) with an internally preset nominal or initial value and a minimum or terminal value, quantitatively displaying the remaining life value or remaining life percentage value of the circuit breaker contact system in real time.
4. The circuit breaker contact system with the finger spring force monitoring function according to claim 1, wherein the external controller is further connected with an early warning system for reminding a user of timely replacing the circuit breaker with the circuit breaker contact system life approaching the full life cycle end value.
5. A circuit breaker contact system with finger spring force monitoring according to claim 1, characterized in that the contact support 1 is provided with a wiring groove (12) facilitating the wiring of the output wire (22), which wiring groove (12) is connected to the cavity (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010434179.7A CN111681920B (en) | 2020-05-21 | 2020-05-21 | Circuit breaker contact system with touch finger spring force monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010434179.7A CN111681920B (en) | 2020-05-21 | 2020-05-21 | Circuit breaker contact system with touch finger spring force monitoring function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111681920A CN111681920A (en) | 2020-09-18 |
| CN111681920B true CN111681920B (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010434179.7A Active CN111681920B (en) | 2020-05-21 | 2020-05-21 | Circuit breaker contact system with touch finger spring force monitoring function |
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| Country | Link |
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| CN (1) | CN111681920B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117597758A (en) * | 2021-07-07 | 2024-02-23 | Abb瑞士股份有限公司 | Sensing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689979B1 (en) * | 1999-07-02 | 2004-02-10 | Siemens Aktiengesellschaft | Switching contact arrangement of a low voltage circuit breaker with main contacts, intermediate contact and arcing contacts |
| CN201773777U (en) * | 2010-06-30 | 2011-03-23 | 北京人民电器厂有限公司 | Moving contact system of circuit breaker |
| CN103377860A (en) * | 2012-04-20 | 2013-10-30 | 施耐德电器工业公司 | Breaker and method for monitoring degree of abrasion of contact of breaker |
| CN103745896A (en) * | 2013-12-23 | 2014-04-23 | 上海良信电器股份有限公司 | Moving contact system of circuit breaker |
| CN204303730U (en) * | 2015-01-23 | 2015-04-29 | 德力西电气有限公司 | The structure of contact terminal of air-break and contact system |
| CN205911273U (en) * | 2016-06-23 | 2017-01-25 | 上海良信电器股份有限公司 | Low -voltage circuit breaker contact system's improvement structure |
| CN209216905U (en) * | 2019-01-24 | 2019-08-06 | 法泰电器（江苏）股份有限公司 | A kind of trigger device of breaker |
-
2020
- 2020-05-21 CN CN202010434179.7A patent/CN111681920B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689979B1 (en) * | 1999-07-02 | 2004-02-10 | Siemens Aktiengesellschaft | Switching contact arrangement of a low voltage circuit breaker with main contacts, intermediate contact and arcing contacts |
| CN201773777U (en) * | 2010-06-30 | 2011-03-23 | 北京人民电器厂有限公司 | Moving contact system of circuit breaker |
| CN103377860A (en) * | 2012-04-20 | 2013-10-30 | 施耐德电器工业公司 | Breaker and method for monitoring degree of abrasion of contact of breaker |
| CN103745896A (en) * | 2013-12-23 | 2014-04-23 | 上海良信电器股份有限公司 | Moving contact system of circuit breaker |
| CN204303730U (en) * | 2015-01-23 | 2015-04-29 | 德力西电气有限公司 | The structure of contact terminal of air-break and contact system |
| CN205911273U (en) * | 2016-06-23 | 2017-01-25 | 上海良信电器股份有限公司 | Low -voltage circuit breaker contact system's improvement structure |
| CN209216905U (en) * | 2019-01-24 | 2019-08-06 | 法泰电器（江苏）股份有限公司 | A kind of trigger device of breaker |
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| Publication number | Publication date |
|---|---|
| CN111681920A (en) | 2020-09-18 |
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