CN208061982U - A kind of electrothermal relay with creepage protection function - Google Patents
A kind of electrothermal relay with creepage protection function Download PDFInfo
- Publication number
- CN208061982U CN208061982U CN201820470239.9U CN201820470239U CN208061982U CN 208061982 U CN208061982 U CN 208061982U CN 201820470239 U CN201820470239 U CN 201820470239U CN 208061982 U CN208061982 U CN 208061982U
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- shell
- fixedly mounted
- connecting rod
- electrothermal relay
- partition board
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- 238000005192 partition Methods 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000004020 conductor Substances 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000001012 protector Effects 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 10
- 230000007935 neutral effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
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- Protection Of Generators And Motors (AREA)
Abstract
The utility model discloses a kind of electrothermal relays with creepage protection function,Including mutual inductor,Annular core,Guide plate,Flexible connector,Movable contact connecting rod,Spring leaf,Shell,Electromagnet and intermediate amplifier,Partition board is fixedly mounted in the inside of the shell,The lower section of partition board is earth leakage protective device installation cavity,The top electrothermal relay installation cavity of partition board,Annular core is fixedly mounted on the lower section of partition board,First connecting terminal is fixedly mounted on the lower curtate outer end of shell,Detection button is fixedly mounted on the left side wall outer end of shell,The electrothermal relay with creepage protection function is simple in structure,It is easy to use,Executive component in earth leakage protective device is directly acted on to the lever in electrothermal relay,And setting is directly connected in motor circuit,Cause False Leakage Protector Operation when being powered so as to avoid control loop,Realize that only earth leakage protective device just generates protection act when motor leaks electricity,Stability and the reliability for substantially increasing motor running system are high.
Description
Technical field
The utility model is related to power domain, specifically a kind of electrothermal relay with creepage protection function.
Background technology
In three-phase alternating-current motor driven equipment, motor insulation ag(e)ing or mechanical damage cause motor electric leakage to be not
The thing occurred is can avoid, the life security of personnel is directly threatened.Although motor takes protective grounding or zero line protection,
Everlasting earthing or grounding means corrosion, grounding screw loosen so that motor ground resistance becomes larger, or even has been seen on ground wire surface
Come intact and has actually lost grounding function.When motor electric leakage, motor administrative staff's electric shock injures and deaths thing can be inevitably caused
Therefore cause national human life property loss.For the generation for thoroughly avoiding this dangerous, this patent is proposed in all AC control box
Install earth leakage protective device in electrothermal relay additional, as long as motor leaks electricity, electric leakage electrothermal relay action makes electric motor circuit breaking.For insulation
For satisfactory three-phase alternating-current motor, three firewires are passed through in the electrothermal relay that leaks electricity（What three-phase four limited also passes through
The neutral conductor）, the sum of three-phase current is equal to zero, but as long as there is phase electric leakage, the sum of three-phase current is not equal to zero, earth leakage protective dress
Set action.The working value of leakage current is set three-phase incomplete equilibrium to be required to meet protection, such electrothermal relay
To motor, there are three protective effects, that is, overload, phase shortage, earth leakage protective.In the prior art, electrothermal relay and earth leakage protective
Device is two autonomous devices, and earth leakage protective device is generally connected in the main current supply circuit of power switch, the heater element of electrothermal relay
It is connected in the main current supply circuit of motor, normally closed interlock is connected in the control loop of motor, due to the subsequent control of power switch
Circuit processed is connected in two-phase therein, three-phase current unbalance, and control circuit also has dash current when being powered, and can all cause to leak electricity
Protector malfunctions, and the stability and reliability to reduce motor running system are high.
Utility model content
The purpose of this utility model is to provide a kind of electrothermal relays with creepage protection function, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the utility model provides the following technical solutions：One kind of the utility model is protected with electric leakage
The electrothermal relay of protective function, including mutual inductor, annular core, guide plate, flexible connector, movable contact connecting rod, spring leaf, shell
Partition board is fixedly mounted in the inside of body, electromagnet and intermediate amplifier, the shell, and the lower section of partition board is installed for earth leakage protective device
Chamber, the top electrothermal relay installation cavity of partition board, annular core are fixedly mounted on the lower section of partition board, and the first connecting terminal is fixedly mounted
In the lower curtate outer end of shell, detection button is fixedly mounted on the left side wall outer end of shell, and intermediate amplifier is fixedly mounted on annular
The right side of iron core, guide plate are mounted on the top in shell and positioned at partition board, are set on the left side of guide plate there are three column is driven, second connects
Line terminals are fixedly mounted in the top exterior walls of shell, and heater element is fixedly mounted on the top in shell and positioned at guide plate, hair
The lower end of thermal element is contacted with the left side of driving column in guide plate and with driving column, and normally opened stationary contact and normally closed stationary contact are solid
Above right side of the Dingan County mounted in enclosure interior and positioned at guide plate, reset button is fixedly mounted on the top of shell, movable contact connecting rod
In shell, the lower end movable contact of movable contact connecting rod and normally closed stationary contact point contact, the upper left-hand of movable contact connecting rod pass through
Flexible connector is connect with reset button, and current regulation cam turning knob is mounted on the top right side of shell, and current regulation connects
Bar is fixedly mounted on current regulation cam and in shell, and current regulation connecting rod is eccentric under current regulation cam to be placed,
The lower left of lever and current regulation connecting rod is hinged, and the end portion of lever is located at the right side of guide plate, the upper end left side of lever
Electromagnet is fixedly mounted, lever upper end is installed with to be passed through with the matched armature of electromagnet, the upper right of movable contact connecting rod
Flexible connector is connect with lever, and lever is connect by spring leaf with the lower curtate free end of movable contact connecting rod.
In the above-mentioned electrothermal relay with creepage protection function, the heater element is wound on different heat expansion
On the bimetal leaf of coefficient, one end of heater element is electrically connected by conducting wire and the second connecting terminal, heater element it is another
End is electrically connected by conducting wire and across annular core and the first connecting terminal.
In the above-mentioned electrothermal relay with creepage protection function, first connecting terminal and the second connecting terminal are equal
For three-phase electric connecting terminals.
In the above-mentioned electrothermal relay with creepage protection function, the detection button is connect with a wherein phase conductor,
The other end of detection button is connect by resistance and with another phase conductor.
In the above-mentioned electrothermal relay with creepage protection function, coiling mutual inductance line on the external annulus of the annular core
The input terminal of circle, mutual inductor and intermediate amplifier connects, and output end and the electromagnet of intermediate amplifier are electrically connected.
Compared with prior art, the utility model has the beneficial effects that：
This utility structure is simple, easy to use, and earth leakage protective device will be installed in electrothermal relay, thus by two kinds of protection machines
System is combined, and the execution original paper in earth leakage protective device directly acts on the lever in electrothermal relay, and the present apparatus is directly connected
In the current supply circuit of motor, False Leakage Protector Operation, realization is caused only to be worked as when being powered so as to avoid control loop
Earth leakage protective device just generates protection act when motor leaks electricity, and substantially increases the stability and reliability of motor running system
It is high.
Description of the drawings
Fig. 1 is the structural schematic diagram of the electrothermal relay with creepage protection function；
In figure：First connecting terminal 1, mutual inductor 2, resistance 3, annular core 4, detection button 5, partition board 6, guide plate 7, hair
Thermal element 8, the second connecting terminal 9, reset button 10, flexible connector 11, movable contact connecting rod 12, spring leaf 13, current regulation
Cam 14, current regulation connecting rod 15, shell 16, electromagnet 17, lever 18, normally opened stationary contact 19, normally closed stationary contact 20 and centre
Amplifier 21.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, in the utility model embodiment, a kind of electrothermal relay with creepage protection function, including first
Connecting terminal 1, mutual inductor 2, resistance 3, annular core 4, detection button 5, partition board 6, guide plate 7, heater element 8, the second wiring
Terminal 9, reset button 10, flexible connector 11, movable contact connecting rod 12, spring leaf 13, current regulation cam 14, current regulation connect
Bar 15, shell 16, electromagnet 17, lever 18, normally opened stationary contact 19, normally closed stationary contact 20 and intermediate amplifier 21, the shell
Partition board 6 is fixedly mounted in 16 inside, and the lower section of partition board 6 is earth leakage protective device installation cavity, the top electrothermal relay installation of partition board 6
Chamber, annular core 4 are fixedly mounted on the lower section of partition board 6, and the first connecting terminal 1 is fixedly mounted on the lower curtate outer end of shell 16, inspection
The left side wall outer end that button 5 is fixedly mounted on shell 16 is surveyed, intermediate amplifier 21 is fixedly mounted on the right side of annular core 4, leads
Plate 7 is mounted on the top in shell 16 and positioned at partition board 6, sets that there are three drive column, the second connecting terminal 9 on the left side of guide plate 7
It is fixedly mounted in the top exterior walls of shell 16, heater element 8 is fixedly mounted on the top in shell 16 and positioned at guide plate 7, hair
The lower end of thermal element 8 is contacted with the left side of driving column in guide plate 7 and with driving column, normally opened stationary contact 19 and normally closed stationary contact
20 are fixedly mounted on 16 inside of shell and are located above the right side of guide plate 7, and reset button 10 is fixedly mounted on the top of shell 16
Portion, movable contact connecting rod 12 are mounted in shell 16, and the top movable contact of movable contact connecting rod 12 is contacted with normally closed stationary contact 20, are moved and are touched
The upper left-hand of point connecting rod 12 is connect by flexible connector 11 with reset button 10, the installation of 14 turning knob of current regulation cam
In the top right side of shell 16, current regulation connecting rod 15 is fixedly mounted on current regulation cam 14 and in shell 16, electricity
Stream adjusts connecting rod 15 in the 14 times eccentric placements of current regulation cam, and lever 18 and the lower left of current regulation connecting rod 15 are hinged,
The end portion of lever 18 is located at the right side of guide plate 7, and electromagnet 17 is fixedly mounted on the left of the upper end of lever 18, and 18 upper end of lever is solid
Dingan County, which is equipped with, to be connected with 17 matched armature of electromagnet, the upper right of movable contact connecting rod 12 by flexible connector 11 and lever 18
It connects, lever 18 is connect by spring leaf 13 with the lower end free end of movable contact connecting rod 12, and the heater element 8 is wound on not
With on the bimetal leaf of coefficient of thermal expansion, one end of heater element 8 is electrically connected by conducting wire and the second connecting terminal 9, fever
The other end of element 8 is electrically connected by conducting wire and across annular core 4 and the first connecting terminal 1；First connecting terminal 1
It is three-phase electric connecting terminals with the second connecting terminal 9；The detection button 5 is connect with a wherein phase conductor, detection button 5
The other end is connect by resistance 3 and with another phase conductor；Coiling mutual inductor 2 on the external annulus of the annular core 4, mutual inductance line
Circle 2 is connect with the input terminal of intermediate amplifier 21, and output end and the electromagnet 17 of intermediate amplifier 21 are electrically connected；In use,
First connecting terminal 1 and the second connecting terminal 9 are connected in the main circuit power supply of motor, normally closed stationary contact 20 is touched with dynamic
Point be connected in the control loop of motor, when motor leaks electricity, phase line, the neutral conductor current vector and be not equal to
Zero, it to generate induced electromotive force in mutual inductor 2, and is input in intermediate amplifier 21 and is amplified processing, after amplification
Signal be input in electromagnet 17, electromagnet 17 attract lever 18 on armature simultaneously so that the upper end of lever 18 is moved downward, thick stick
Drive 12 lower end of movable contact connecting rod to move right by spring leaf 13 while 18 upper end of bar moves downward, to make movable contact with
Normally closed stationary contact 20 detaches, the power-off of Motor Control circuit, major loop power-off, motor parking, to play earth leakage protective, together
When avoid when control loop is powered and cause False Leakage Protector Operation, realize the only earth leakage protective device ability when motor leak electricity
Protection act is generated, stability and the reliability for substantially increasing motor running system are high.
The operation principle of the utility model is：
In use, the first connecting terminal 1 and the second connecting terminal 9 are connected in the main circuit power supply of motor, it will be normal
Stationary contact 20 and movable contact is closed to be connected in the control loop of motor, when motor leaks electricity, phase line, the neutral conductor electricity
Flow vector and it is not equal to zero, to generating induced electromotive force in mutual inductor 2, and is input in intermediate amplifier 21 and is put
Big processing, amplified signal are input in electromagnet 17, and electromagnet 17 attracts the armature on lever 18 and makes the upper of lever 18
End moves downward, and drives 12 lower end of movable contact connecting rod to move right by spring leaf 13 while 18 upper end of lever moves downward,
To make movable contact be detached with normally closed stationary contact 20, the power-off of Motor Control circuit, major loop power-off, motor parking, to
Earth leakage protective is played, while avoiding when control loop is powered and causing False Leakage Protector Operation, is realized only when motor leaks
Earth leakage protective device just generates protection act when electric, and stability and the reliability for substantially increasing motor running system are high.
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art is come
Say, still can with technical scheme described in the above embodiments is modified, or to which part technical characteristic into
Row equivalent replacement, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all
It is included within the scope of protection of this utility model.
Claims (5)
1. a kind of electrothermal relay with creepage protection function, including mutual inductor (2), annular core (4), guide plate (7), elasticity
Connector (11), movable contact connecting rod (12), spring leaf (13), shell (16), electromagnet (17) and intermediate amplifier (21), it is special
Sign is that partition board (6) is fixedly mounted in the inside of the shell (16), and the lower section of partition board (6) is earth leakage protective device installation cavity, partition board
(6) top electrothermal relay installation cavity, annular core (4) are fixedly mounted on the lower section of partition board (6), and the first connecting terminal (1) is solid
Dingan County is mounted in the lower curtate outer end of shell (16), and detection button (5) is fixedly mounted on the left side wall outer end of shell (16), centre amplification
Device (21) is fixedly mounted on the right side of annular core (4), and guide plate (7) is mounted on the top in shell (16) and positioned at partition board (6),
It being set on the left side of guide plate (7) there are three driving column, the second connecting terminal (9) is fixedly mounted in the external wall of upper portion of shell (16),
Heater element (8) is fixedly mounted on the upper left side in shell (16) and positioned at guide plate (7), the lower end of heater element (8) be located at
The left side of column is driven in guide plate (7) and is contacted with driving column, and normally opened stationary contact (19) is fixedly mounted with normally closed stationary contact (20)
In shell (16) above internal and right side positioned at guide plate (7), reset button (10) is fixedly mounted on the top of shell (16), moves
Contact connecting rod (12) upper end is mounted in shell (16), and lower end movable contact and the normally closed stationary contact (20) of movable contact connecting rod (12) connect
It touches, the upper left-hand of movable contact connecting rod (12) is connect by flexible connector (11) with reset button (10), current regulation cam
(14) turning knob is mounted on the top right side of shell (16), and current regulation connecting rod (15) is fixedly mounted on current regulation cam
(14) on and in shell (16), current regulation connecting rod (15) is eccentric under current regulation cam (14) to be placed, lever (18)
Hinged with the lower left of current regulation connecting rod (15), the end portion of lever (18) is located at the right side of guide plate (7), lever (18)
Upper end on the left of be fixedly mounted electromagnet (17), lever (18) upper end be installed with electromagnet (17) matched armature, move
The upper right of contact connecting rod (12) is connect by flexible connector (11) with lever (18), and lever (18) passes through spring leaf (13)
It is connect with the lower curtate free end of movable contact connecting rod (12).
2. the electrothermal relay according to claim 1 with creepage protection function, which is characterized in that the heater element
(8) it is wound on the bimetal leaf with different heat expansion coefficient, one end of heater element (8) passes through conducting wire and the second terminals
Sub (9) are electrically connected, and the other end of heater element (8) is by conducting wire and across annular core (4) and the first connecting terminal (1) electricity
Property connection.
3. the electrothermal relay according to claim 1 with creepage protection function, which is characterized in that first terminals
Sub (1) and the second connecting terminal (9) are three-phase electric connecting terminals.
4. the electrothermal relay according to claim 1 with creepage protection function, which is characterized in that the detection button
(5) it is connect with a wherein phase conductor, the other end of detection button (5) is connect by resistance (3) and with another phase conductor.
5. the electrothermal relay according to claim 1 with creepage protection function, which is characterized in that the annular core
(4) coiling mutual inductor (2) on external annulus, mutual inductor (2) are connect with the input terminal of intermediate amplifier (21), centre amplification
The output end of device (21) is electrically connected with electromagnet (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820470239.9U CN208061982U (en) | 2018-04-04 | 2018-04-04 | A kind of electrothermal relay with creepage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820470239.9U CN208061982U (en) | 2018-04-04 | 2018-04-04 | A kind of electrothermal relay with creepage protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208061982U true CN208061982U (en) | 2018-11-06 |
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ID=63987709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820470239.9U Expired - Fee Related CN208061982U (en) | 2018-04-04 | 2018-04-04 | A kind of electrothermal relay with creepage protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208061982U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110047708A (en) * | 2019-04-15 | 2019-07-23 | 广东求精电气有限公司 | A kind of electrothermal relay with protection motor function |
| CN111223694A (en) * | 2020-01-15 | 2020-06-02 | 何秀玲 | Magnetic self-locking protective device for SOS button of train toilet |
-
2018
- 2018-04-04 CN CN201820470239.9U patent/CN208061982U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110047708A (en) * | 2019-04-15 | 2019-07-23 | 广东求精电气有限公司 | A kind of electrothermal relay with protection motor function |
| CN111223694A (en) * | 2020-01-15 | 2020-06-02 | 何秀玲 | Magnetic self-locking protective device for SOS button of train toilet |
| CN111223694B (en) * | 2020-01-15 | 2022-10-11 | 萧县华企云谷中小企业服务中心有限公司 | Magnetic self-locking protection device for SOS button of train toilet |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181106 |