CN112863953B - Asynchronous double-break contact mechanism and residual current operated circuit breaker - Google Patents
Asynchronous double-break contact mechanism and residual current operated circuit breaker Download PDFInfo
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- CN112863953B CN112863953B CN202110006040.7A CN202110006040A CN112863953B CN 112863953 B CN112863953 B CN 112863953B CN 202110006040 A CN202110006040 A CN 202110006040A CN 112863953 B CN112863953 B CN 112863953B
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- pole
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- cavity
- moving contact
- circuit breaker
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- 230000003068 static effect Effects 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 9
- 229910052709 silver Inorganic materials 0.000 description 9
- 239000004332 silver Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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
- H01H71/10—Operating or release mechanisms
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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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- 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
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
- H01H71/0235—Contacts and the arc extinguishing space inside individual separate cases, which are positioned inside the housing of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
Landscapes
- Breakers (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses an asynchronous double-break contact mechanism and a residual current operated circuit breaker. The residual current operated circuit breaker comprises a shell, an asynchronous double-break contact mechanism, a base, an arc extinguishing device, an instantaneous electromagnetic tripping device, an electric leakage tripping device, a PCB (printed circuit board) and a high-sensitivity transformer, wherein N is enabled to be broken by zero current through the L, N bipolar asynchronous double-break contact mechanism, so that the arc extinguishing device and the instantaneous electromagnetic tripping device can be omitted at N, and most of space is saved for structural layout. The invention has compact structure, small volume and reliable operation, and can be fully applied to the environment with higher installation volume requirement.
Description
Technical Field
The invention relates to the field of low-voltage circuit breakers, in particular to an asynchronous double-break contact mechanism and a residual current operated circuit breaker.
Background
In real life, an electric element (commonly called a leakage switch) such as a residual current operated circuit breaker is basically used in every place where electricity is available. The mechanical switch device is mainly used for detecting residual current, comparing the residual current value with a reference value, and when the residual current value exceeds the reference value, disconnecting the main circuit contact. When the electric shock of the person or the leakage current of the power grid exceeds a specified value, the residual current operated circuit breaker can rapidly cut off the fault power supply in a very short time, so that the safety of the person and the electric equipment is protected, meanwhile, the overload or short circuit of a circuit and a motor can be protected, the circuit can also be used for the infrequent switching of the circuit and the infrequent starting of the motor, and the residual current operated circuit breaker is an electric appliance widely applied in production and life. In the prior art, the unipolar residual current operated circuit breaker has large volume (generally 54 modules), N poles cannot be isolated, and the bipolar residual current operated circuit breaker has larger volume (generally 72 modules) although each pole can be isolated, so that the requirement of the limited installation environment of the installation space cannot be met.
Disclosure of Invention
In order to solve the problems, the invention provides an asynchronous double-break contact mechanism and a residual current operated circuit breaker.
An asynchronous double-break contact mechanism comprises an L-pole structure and an N-pole structure;
the L pole structure comprises an L pole handle, an L pole U-shaped shaft, an L pole lever, an L pole moving contact and an L pole static contact, wherein the L pole handle is connected with the L pole U-shaped shaft, the L pole lever and the L pole moving contact through shafts, and the L pole handle drives the L pole moving contact to swing through the L pole lever to contact or separate from the fixedly installed L pole static contact;
the N pole structure comprises an N pole handle, an N pole U-shaped shaft, an N pole linkage piece, an N pole moving contact and an N pole fixed contact, wherein the N pole handle is connected with the N pole U-shaped shaft, the N pole linkage piece and the N pole moving contact through shafts, and the N pole handle drives the N pole moving contact to swing through the N pole linkage piece to contact or separate from the N pole fixed contact which is fixedly installed;
the L-pole handle is connected with the N-pole handle, and the N-pole moving contact is connected earlier than the L-pole moving contact when the switch is closed; when the gate is opened, the N-pole moving contact is disconnected after being compared with the L-pole moving contact.
The N pole static contact and the L pole static contact are arranged in the same position.
The distance between the N-pole moving contact and the N-level fixed contact is smaller than that between the L-pole moving contact and the L-level fixed contact.
As a further improvement of the invention, the distance between the connecting shaft of the N pole linkage close to the N pole U-shaped shaft and the connecting shaft of the N pole linkage close to the N pole moving contact is smaller than the distance between the connecting shaft of the L pole lever close to the L pole U-shaped shaft and the connecting shaft of the L pole lever close to the L pole moving contact; the distance between the connecting shaft of the N pole linkage piece, which is close to the N pole moving contact, and the contact of the N pole moving contact is larger than the distance between the connecting shaft of the L pole lever, which is close to the L pole moving contact, and the contact of the L pole moving contact.
The contact end of the L-pole movable contact is bent.
The residual current operated circuit breaker comprises a shell and the asynchronous double-break contact mechanism, wherein two cavities which are parallel to each other are arranged in the shell, the first cavity is provided with an L-pole structure of the asynchronous double-break contact mechanism, and the second cavity is provided with an N-pole structure of the asynchronous double-break contact mechanism.
The high-sensitivity transformer is arranged between the first cavity and the second cavity, the first cavity is also provided with a wiring device, an arc extinguishing device and an instantaneous electromagnetic tripping device, the wiring device comprises two wiring frames which are respectively arranged at two ends of the shell, an L pole static contact of an L pole structure is fixedly arranged in the first cavity and connected with the wiring frame at the top end, the L pole structure, the instantaneous electromagnetic tripping device and the arc extinguishing device are respectively arranged at the upper part, the middle part and the lower part of one side of the first cavity, the high-sensitivity transformer is arranged at the lower part of the different sides of the first cavity and the movable contact of the L pole structure, and the high-sensitivity transformer and the movable contact of the L pole structure are respectively arranged at two sides of the arc extinguishing device;
the second cavity is further provided with a wiring device, an electric leakage tripping device and a PCB circuit board, the wiring device comprises two wiring frames which are respectively arranged at two ends of the shell, an N pole static contact of an N pole structure is fixedly arranged in the second cavity and connected with the top wiring frame, the N pole structure, the electric leakage tripping device and the PCB circuit board are respectively arranged at the upper part, the middle part and the lower part of one side of the second cavity, the high-sensitivity transformer is arranged at the lower part of the different sides of the movable contact of the second cavity and the N pole structure, and the high-sensitivity transformer and the movable contact of the N pole structure are respectively arranged at two sides of the PCB circuit board.
An arc baffle plate for preventing the arc from overflowing is arranged between the L-pole stationary contact and the inner wall of the first cavity.
And a magnetic conduction plate for guiding an arc moving track is arranged between the arc extinguishing device and the L pole movable contact.
And a plurality of mutually parallel bosses for cutting short-circuit arcs are further arranged between the arc extinguishing device and the L pole movable contact.
The beneficial effects of the invention are as follows: the invention makes N-pole zero current break through L, N two-pole asynchronous double-break contact mechanism, so that an arc extinguishing device and an instant electromagnetic tripping device can be omitted in N-pole, and most of space is saved for structural layout. The invention has compact structure, small volume and reliable operation, and can be fully applied to the environment with higher installation volume requirement.
Drawings
Fig. 1 is a schematic diagram of an embodiment of an asynchronous double break contact mechanism.
Fig. 2 is a schematic structural view of another embodiment of an asynchronous double break contact mechanism.
Fig. 3 is a schematic diagram of a first cavity structure of an embodiment of a residual current operated circuit breaker.
Fig. 4 is a schematic diagram of a second cavity structure of an embodiment of a residual current operated circuit breaker.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings.
As shown in fig. 1, an asynchronous double-break contact mechanism comprises an L-pole structure and an N-pole structure;
the L pole structure comprises an L pole handle 1, an L pole U-shaped shaft 2, an L pole lever 3, an L pole moving contact 4, an L pole fixed contact 5 and an L pole fixed silver point 6, wherein the L pole handle 1 is connected with the L pole U-shaped shaft 2, the L pole lever 3 and the L pole moving contact 4 through shafts, the L pole fixed silver point 6 is arranged on the surface of the L pole fixed contact 5, and the L pole handle 1 drives the L pole moving contact 4 to swing through the L pole lever 3 to contact or separate from the L pole fixed silver point 6 on the fixedly installed L pole fixed contact 5;
the N pole structure comprises an N pole handle 7, an N pole U-shaped shaft 8, an N pole linkage piece 9, an N pole movable contact 10, an N pole fixed contact 11, an N pole movable silver point 13 and an N pole fixed silver point 12, wherein the N pole handle 7 is connected with the N pole U-shaped shaft 8, the N pole linkage piece 9 and the N pole movable contact 10 through shafts, the N pole movable silver point 13 is arranged on the surface of the N pole movable contact 10, the N pole fixed silver point 12 is arranged on the surface of the N pole fixed contact 11, and the N pole handle 7 drives the N pole movable contact 10 to swing through the N pole linkage piece 9 to drive the N pole movable silver point 13 to contact or separate from the N pole fixed silver point 12 on the N pole fixed contact 11 which is fixedly arranged;
the L-pole handle 1 is communicated with the N-pole handle 7, and the two handles ensure final pressure and stable working performance.
The contact end of the L-pole movable contact 4 is bent.
The N pole static contact 11 and the L pole static contact 5 are arranged in the same position.
The distance between the N-pole moving contact 10 and the N-pole fixed contact 11 is 1-1.5mm smaller than the distance between the L-pole moving contact 4 and the L-pole fixed contact 5, when the switch is closed, the N-pole moving contact 10 is firstly switched on than the L-pole moving contact 11, and when the switch is opened, the N-pole moving contact 10 is switched off than the L-pole moving contact 11.
As shown in fig. 2, another asynchronous double-break contact mechanism comprises an L-pole structure and an N-pole structure in the embodiment shown in fig. 1, wherein an N-pole fixed contact and an L-pole fixed contact are arranged in the same position, and the distance between a connecting shaft c2 of an N-pole linkage close to an N-pole U-shaped shaft and a connecting shaft d2 of an N-pole linkage close to an N-pole movable contact is smaller than the distance between a connecting shaft c1 of an L-pole lever close to an L-pole U-shaped shaft and a connecting shaft d1 of an L-pole lever close to an L-pole movable contact; the distance between the connecting shaft d2 of the N-pole linkage piece, which is close to the N-pole moving contact, and the contact point f2 of the N-pole moving contact is larger than the distance between the connecting shaft d1 of the L-pole lever, which is close to the L-pole moving contact, and the contact point f1 of the L-pole moving contact. When the switch is closed, the N-pole moving contact is firstly connected with the L-pole moving contact, redundant travel is hidden by the system after the switch is closed, and when the switch is opened, the N-pole moving contact is released by redundant travel, so the switch is disconnected after the moving contact in the L-pole idle switch.
When the two structures can realize switching on, the N-pole moving contact is switched on earlier than the L-pole moving contact; when the gate is opened, the N-pole moving contact is disconnected after being compared with the L-pole moving contact. The two structures can be combined and overlapped to achieve the aim.
As shown in fig. 3-4, a residual current operated circuit breaker comprises a housing 101 and an asynchronous double-break contact mechanism shown in fig. 1, wherein the housing 101 is provided with a base 106, a partition board 102 is arranged in the housing 101, the partition board 102 separates the housing 101 to form two cavities, the two cavities are a first cavity used for arranging an L-pole circuit breaker module and a second cavity used for arranging an N-pole circuit breaker module, and a high-sensitivity transformer 105 is arranged between the first cavity and the second cavity.
The L pole breaker module comprises a wiring device, an L pole structure 109 in an asynchronous double-break contact mechanism, an arc extinguishing device 107 and an instantaneous electromagnetic tripping device 104, wherein the wiring device comprises two wiring frames 103 and 108 which are respectively arranged at two ends of the shell 101, an L pole stationary contact of the L pole structure is fixedly arranged in a first cavity and is connected with the top wiring frame 108, the L pole structure 109, the instantaneous electromagnetic tripping device 104 and the arc extinguishing device 107 are respectively arranged at the upper part, the middle part and the lower part of one side of the first cavity, the high-sensitivity transformer 105 is arranged at the lower part of the different sides of the first cavity and the movable contact of the L pole structure, and the high-sensitivity transformer 105 and the movable contact of the L pole structure are respectively arranged at two sides of the arc extinguishing device 107. Arc-isolating plate 111 for preventing arc from overflowing is arranged between the L-pole stationary contact and the inner wall of the first cavity, magnetic-conducting plate 110 for guiding arc moving track and a plurality of mutually parallel bosses 112 for cutting short-circuit arc are arranged between the arc-extinguishing device 107 and the L-pole movable contact, and the two are matched to cut and guide the generated arc to the arc-extinguishing device 107.
The N pole breaker module comprises a wiring device, an N pole structure 114 in an asynchronous double-break contact mechanism, a leakage tripping device 112 and a PCB circuit board 113, wherein the wiring device comprises two wiring frames 115 and 116 which are respectively arranged at two ends of the shell 101, an N pole stationary contact of the N pole structure 114 is fixedly arranged in a second cavity and is connected with the top wiring frame 115, the N pole structure 114, the leakage tripping device 112 and the PCB circuit board 113 are respectively arranged at the upper part, the middle part and the lower part of one side of the second cavity, the high-sensitivity transformer 105 is arranged at the lower part of the second cavity and at the different sides of the N pole structure movable contact, and the high-sensitivity transformer 105 and the N pole structure movable contact are respectively arranged at two sides of the PCB circuit board 113.
Because the L, N bipolar asynchronous double-break contact mechanism is adopted to break the N electrode with zero current, an arc extinguishing device and an instantaneous electromagnetic tripping device can be omitted in the N electrode, and most of space is saved for structural layout. The volume of the product can be greatly reduced on the premise of ensuring the working stability.
The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (7)
1. An asynchronous double-break contact mechanism, which is characterized in that: comprises an L-pole structure and an N-pole structure; the L pole structure comprises an L pole handle (1), an L pole U-shaped shaft (2), an L pole lever (3), an L pole moving contact (4) and an L pole fixed contact (5), wherein the L pole handle (1) is connected with the L pole U-shaped shaft (2), the L pole lever (3) and the L pole moving contact (4) through shafts, and the L pole handle (1) drives the L pole moving contact (4) to swing through the L pole lever (3) to contact or separate from the fixedly installed L pole fixed contact (5); the N pole structure comprises an N pole handle (7), an N pole U-shaped shaft (8), an N pole linkage piece (9), an N pole moving contact (10) and an N pole static contact (11), wherein the N pole handle (7) is connected with the N pole U-shaped shaft (8), the N pole linkage piece (9) and the N pole moving contact (10) through shafts, and the N pole handle (7) drives the N pole moving contact (10) to swing through the N pole linkage piece (9) to contact or separate from the N pole static contact (11) which is fixedly installed; the L-pole handle (1) is connected with the N-pole handle (7), and when the switch is closed, the N-pole moving contact (10) is connected earlier than the L-pole moving contact (4); when the switch is opened, the N-pole moving contact (10) is disconnected after the L-pole moving contact (4); the N pole static contact (11) and the L pole static contact (5) are arranged in the same position; the distance between a connecting shaft (c 2) of the N-pole linkage close to the N-pole U-shaped shaft and a connecting shaft (d 2) of the N-pole linkage close to the N-pole moving contact is smaller than the distance between a connecting shaft (c 1) of the L-pole lever close to the L-pole U-shaped shaft and a connecting shaft (d 1) of the L-pole lever close to the L-pole moving contact; the distance between the connecting shaft (d 2) of the N-pole linkage piece, which is close to the N-pole moving contact, and the contact (f 2) of the N-pole moving contact is larger than the distance between the connecting shaft (d 1) of the L-pole lever, which is close to the L-pole moving contact, and the contact (f 1) of the L-pole moving contact.
2. An asynchronous double break contact mechanism according to claim 1, characterized in that: the contact end of the L-pole movable contact (4) is bent.
3. A residual current operated circuit breaker including an asynchronous double break contact mechanism according to claim 1 or 2, characterized in that: the double-break asynchronous contact mechanism comprises a shell (101) and the double-break asynchronous contact mechanism, wherein two cavities which are parallel to each other are arranged in the shell (101), a L pole structure (109) of the double-break asynchronous contact mechanism is arranged in a first cavity, and an N pole structure (114) of the double-break asynchronous contact mechanism is arranged in a second cavity.
4. A residual current operated circuit breaker according to claim 3, characterized in that: the high-sensitivity transformer (105) is arranged between the first cavity and the second cavity, the first cavity is also provided with a wiring device, an arc extinguishing device (107) and an instant electromagnetic tripping device (104), the wiring device comprises two wiring frames (103, 108) which are respectively arranged at two ends of the shell (101), an L pole stationary contact of an L pole structure (109) is fixedly arranged in the first cavity and is connected with the wiring frame (108) at the top end, the L pole structure (109), the instant electromagnetic tripping device (104) and the arc extinguishing device (107) are respectively arranged at the upper part, the middle part and the lower part at one side of the first cavity, the high-sensitivity transformer (105) is arranged at the lower part at the different sides of the first cavity and the movable contact of the L pole structure, and the high-sensitivity transformer (105) and the movable contact of the L pole structure are respectively arranged at two sides of the arc extinguishing device (107); the second cavity is further provided with a wiring device, an electric leakage tripping device (112) and a PCB (printed circuit board) (113), the wiring device comprises two wiring frames (115, 116) which are respectively arranged at two ends of the shell (101), an N pole stationary contact of an N pole structure (114) is fixedly arranged in the second cavity and connected with the wiring frame (115) at the top end, the N pole structure (114), the electric leakage tripping device (112) and the PCB (113) are respectively arranged at the upper part, the middle part and the lower part at one side of the second cavity, the high-sensitivity transformer (105) is arranged at the lower part at the different sides of the second cavity and the movable contact of the N pole structure, and the high-sensitivity transformer (105) and the movable contact of the N pole structure are respectively arranged at two sides of the PCB (113).
5. The residual current operated circuit breaker according to claim 4, wherein: an arc barrier (111) for preventing the arc from overflowing is arranged between the L-pole stationary contact and the inner wall of the first cavity.
6. The residual current operated circuit breaker according to claim 4, wherein: and a magnetic conduction plate (110) used for guiding an arc movement track is arranged between the arc extinguishing device (107) and the L pole movable contact.
7. The residual current operated circuit breaker according to claim 6, wherein: a plurality of mutually parallel bosses (112) for cutting short-circuit arc are also arranged between the arc extinguishing device (107) and the L pole movable contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110006040.7A CN112863953B (en) | 2021-01-05 | 2021-01-05 | Asynchronous double-break contact mechanism and residual current operated circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110006040.7A CN112863953B (en) | 2021-01-05 | 2021-01-05 | Asynchronous double-break contact mechanism and residual current operated circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112863953A CN112863953A (en) | 2021-05-28 |
| CN112863953B true CN112863953B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110006040.7A Active CN112863953B (en) | 2021-01-05 | 2021-01-05 | Asynchronous double-break contact mechanism and residual current operated circuit breaker |
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| Country | Link |
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| CN (1) | CN112863953B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107146745A (en) * | 2016-03-01 | 2017-09-08 | 浙江正泰电器股份有限公司 | Electronic type residual current circuit breaker |
| CN107393770A (en) * | 2017-08-24 | 2017-11-24 | 乐清市也为电气有限公司 | A kind of RCCB |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203931970U (en) * | 2014-06-30 | 2014-11-05 | 温州罗格朗电器有限公司 | The extremely breakable monolithic devices residual current circuit breaker of a kind of N |
| CN109920706A (en) * | 2019-04-16 | 2019-06-21 | 天津加美特电气设备有限公司 | A kind of breaker of the pole N without arc-control device |
| CN210866092U (en) * | 2019-09-05 | 2020-06-26 | 上海正泰智能科技有限公司 | Circuit breaker |
| CN111640628B (en) * | 2020-05-21 | 2022-07-12 | 温州金旭电气有限公司 | Miniature residual current circuit breaker |
| CN212161736U (en) * | 2020-06-10 | 2020-12-15 | 厦门宏发开关设备有限公司 | Residual current circuit breaker |
| CN111627777A (en) * | 2020-06-10 | 2020-09-04 | 厦门宏发开关设备有限公司 | Circuit breaker |
| CN111899992A (en) * | 2020-07-14 | 2020-11-06 | 威胜电气有限公司 | 1P + N circuit breaker and electric equipment provided with same |
-
2021
- 2021-01-05 CN CN202110006040.7A patent/CN112863953B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107146745A (en) * | 2016-03-01 | 2017-09-08 | 浙江正泰电器股份有限公司 | Electronic type residual current circuit breaker |
| CN107393770A (en) * | 2017-08-24 | 2017-11-24 | 乐清市也为电气有限公司 | A kind of RCCB |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112863953A (en) | 2021-05-28 |
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