CN111681920A - Circuit breaker contact system with contact finger spring force monitoring function - Google Patents
Circuit breaker contact system with contact finger spring force monitoring function Download PDFInfo
- Publication number
- CN111681920A CN111681920A CN202010434179.7A CN202010434179A CN111681920A CN 111681920 A CN111681920 A CN 111681920A CN 202010434179 A CN202010434179 A CN 202010434179A CN 111681920 A CN111681920 A CN 111681920A
- Authority
- CN
- China
- Prior art keywords
- contact
- circuit breaker
- spring
- pressure sensor
- value
- 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.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- 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 the influence of the disjunction electric arc and temperature rise of the contact is avoided; the principle is simple and easy to implement, and engineering is facilitated.
Description
Technical Field
The invention relates to a frame type circuit breaker contact system with a contact finger spring force monitoring function, and belongs to the field of low-voltage electrical appliances.
Background
The frame-type circuit breaker is an important component in a low-voltage distribution system, is usually used as an inlet main switch or a branch main switch for distributing electric energy in a distribution network, protecting circuits, power supply equipment and the like, and avoids the damage of faults such as overload, undervoltage, short circuit, single-phase grounding and the like. The existing frame-type circuit breaker contact system mainly comprises 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 other parts. When the circuit breaker works in a distribution circuit, a moving contact and a fixed contact of the circuit breaker are required to be connected with larger normal current or short circuit and overload current, so that a moving contact of the circuit breaker needs certain final pressure to overcome electric repulsion force generated by the current, and the pressure of a contact finger of a contact system is provided by a contact spring arranged in a contact support, so that the pressure value of the contact spring is a very critical parameter in the normal operation process of the circuit breaker. The pressure of the contact spring comprehensively reflects the temperature around the contact finger of the contact system, the abrasion or/and burning loss of the contact, the installation state of the contact spring and other contact system states. The contact support is generally molded integrally from flame-retardant insulating plastic and is provided with a hole for mounting a spring.
The prior art does not have a structural device for directly monitoring the pressure of the contact spring, and the change condition of the pressure of the contact spring and the working state of the circuit breaker can not be monitored in real time. The pressure condition of the contact system of the circuit breaker, particularly the main contact directly influences whether the circuit breaker can be normally used or not, so that the numerical value or the numerical value change of the contact spring pressure of the contact system of the circuit breaker can be directly reflected, and the method has very important significance.
Disclosure of Invention
The purpose of the invention is: the contact system of the circuit breaker can directly reflect the pressure value or the value change of the contact spring.
In order to achieve the above object, the technical scheme of the invention is to provide 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 mounted 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. The pressure sensor outputs a signal which changes along with the pressure of the contact spring in real time, and after the signal is calculated by an external controller, the residual service life value or the residual service life percentage value of the contact system of the circuit breaker is quantitatively displayed in real time.
Preferably, the cavity is coupled to a bottom of the spring mounting hole.
Preferably, when the external controller operates the signal, the real-time signal obtained by the pressure sensor is compared with an internal preset rated value or initial value and a minimum value or terminal value, and the residual life value or the residual life percentage value of the contact system of the circuit breaker is displayed quantitatively in real time.
Preferably, the external controller is further connected with an early warning system to remind 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 wire, and the wiring groove is connected with the cavity.
The invention can provide a breaker contact system with a function of monitoring the spring force of a contact finger, a pressure sensor can be installed in the breaker contact system, the pressure value or the change condition of the value of the spring of the contact system can be intuitively monitored in real time through the real-time output of the sensor, the running state of the contact system and the breaker thereof is directly reflected, the service life cycle use condition of the contact system can be quantitatively monitored to a certain extent, and a user can conveniently and timely replace the breaker with the operation times close to the end of the full service life cycle. The popularization and the application of the invention can better monitor the service state and the service life cycle of the circuit breaker, improve the safety and the stability of a power distribution system, and bring convenience to the 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 the influence of the disjunction electric arc and temperature rise of the contact is avoided;
3) the principle is simple and easy to implement, and engineering is facilitated.
Drawings
Figure 1 is a diagram of a contact support structure of the contact system of the present invention;
FIG. 2 is a schematic view of a sensor;
FIG. 3 is a schematic view of a contact spring and sensor installation;
figure 4 is a diagram of a contact system of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 4, the contact system of the circuit breaker 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 clamp plate 8, a contact finger 9, a contact 10 and other parts.
The contact support 1 is generally molded integrally from flame-retardant insulating plastic and is provided with spring mounting holes 13 for mounting the contact springs 3. Meanwhile, the contact support 1 of the invention is provided with a cavity 11 for mounting the pressure sensor 2, the cavity 11 is coupled 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 in a corresponding working area 21 of the pressure sensor 2.
The contact support 1 is provided with a wiring groove 12 for facilitating the routing of an output wire 22, and the pressure sensor 2 is connected with an external controller through the output wire 22. The wiring duct 12 is connected to the chamber 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 positively pressed on one side of the contact finger 9, so that the contact finger 9 can freely rotate around the rotating shaft 4. The contact spring 3 is always acted on the corresponding working area 21 of the pressure sensor 2, and the change of the compression amount of the contact spring 3 is caused along with the change of the rotation angle of the contact finger 9, so that the pressure of the contact spring 3 pressed 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) which is in one-to-one correspondence with the pressure of the contact spring 3 in real time. After the operation of the external controller, the real-time signal is compared with an internal preset rated value (or initial value) and a minimum value (or terminal value), and the residual life value (or percentage value of the residual life) of the contact system is quantitatively displayed in real time. The technical personnel in the field can also set an early warning system to remind a user to replace the circuit breaker with the service life of the circuit breaker contact system close to the end value of the whole service 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), and the contact spring (3) always acts on the corresponding working area (21) of the pressure sensor (2), along with the change of the rotation angle of the contact finger (9), the compression amount of the contact spring (3) is changed, so that the pressure of the contact spring (3) pressed on a corresponding working area (21) of the pressure sensor (2) is changed along with the change of the compression amount, the pressure sensor (2) outputs a signal along with the change of the pressure of the contact spring (3) in real time, and after the signal is calculated by an external controller, the residual service life value or the residual service life percentage value of the contact system of the circuit breaker is quantitatively displayed in real time.
2. The circuit breaker contact system with finger spring force monitoring function as claimed in claim 1, wherein the cavity (11) is arranged in coupling with the bottom of the spring mounting hole (13).
3. The circuit breaker contact system with the function of monitoring the spring force of the contact finger according to claim 1, wherein when the external controller operates the signal, the real-time signal obtained by the pressure sensor (2) is compared with an internal preset rated value or initial value and a minimum value or terminal value, and the remaining life value or the percentage value of the remaining life of the circuit breaker contact system is displayed quantitatively in real time.
4. The circuit breaker contact system with the function of monitoring the spring force of the contact finger as claimed in claim 1, wherein the external controller is further connected with an early warning system for reminding a user to replace the circuit breaker with the service life of the circuit breaker contact system close to the end value of the full life cycle in time.
5. The contact system of a circuit breaker with finger spring force monitoring function according to claim 1, characterized in that the contact support 1 is provided with a wiring groove (12) for facilitating the wiring of the output conductor (22), and the wiring groove (12) is connected with 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 true CN111681920A (en) | 2020-09-18 |
| CN111681920B CN111681920B (en) | 2023-04-25 |
Family
ID=72452143
Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111681920B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279287A1 (en) * | 2021-07-07 | 2023-01-12 | Abb Schweiz Ag | Sensing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111681920B (en) | 2023-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111769649B (en) | Cable intermediate head monitoring system | |
| CN201740830U (en) | Surge protector thermal stability testing device | |
| CN201038736Y (en) | Motor multifunctional energy-saving intelligent protection and control cabinet | |
| CN103269060A (en) | Microcomputer intelligent arc light protective system | |
| CN103346044B (en) | With the low-voltage circuit breaker of connecting terminal block temperature rise monitoring device | |
| CN104578430A (en) | Online monitoring device for circuit breaker operating mechanism | |
| CN109459227B (en) | Real-time alarm structure and method for detecting mechanical parameters of circuit breaker | |
| CN111681920A (en) | Circuit breaker contact system with contact finger spring force monitoring function | |
| CN203787830U (en) | Composite monitoring intelligent armored withdrawable high-voltage switch cabinet | |
| CN201569508U (en) | Temperature rise monitoring and analyzing device of high-pressure equipment | |
| CN203398043U (en) | Low-voltage breaker with connecting terminal block temperature rise monitoring device | |
| CN217720708U (en) | Valve electric actuator protection device | |
| CN202210333U (en) | Optical fiber temperature sensing system of fire hazard monitoring system | |
| CN201345457Y (en) | Plug used for air conditioner and provided with function of fault electric arc protection | |
| CN215934468U (en) | Special circuit breaker of intelligent low pressure surge protector | |
| CN113054624B (en) | Special breaker for intelligent low-voltage surge protector and control method thereof | |
| CN206060225U (en) | Centralized control equipment based on small photovoltaic power generation system | |
| CN202076781U (en) | Protector with temperature monitoring | |
| CN114498914A (en) | Intelligent substation synthesizes monitored control system | |
| CN210072434U (en) | Heater centralized control system | |
| CN211046469U (en) | Arc light rapid protection device | |
| CN207442248U (en) | Distribution box and distribution system | |
| CN112782447A (en) | Intelligent fuse is fused to one secondary | |
| CN212114888U (en) | Power distribution system | |
| CN214375972U (en) | Take infrared temperature monitoring type moulded case circuit breaker controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |