CN111383862A - Relay protection resetting means and tobacco processing equipment's air compressor - Google Patents
Relay protection resetting means and tobacco processing equipment's air compressor Download PDFInfo
- Publication number
- CN111383862A CN111383862A CN201811619616.1A CN201811619616A CN111383862A CN 111383862 A CN111383862 A CN 111383862A CN 201811619616 A CN201811619616 A CN 201811619616A CN 111383862 A CN111383862 A CN 111383862A
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- reset
- protection
- resetting
- rod
- contactor
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 12
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 12
- 238000012545 processing Methods 0.000 title claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010891 electric arc Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 10
- 238000003825 pressing Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
-
- 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
- H01H71/50—Manual reset mechanisms which may be also used for manual release
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The disclosure relates to a relay protection resetting device and an air compressor of tobacco processing equipment, wherein the relay protection resetting device comprises a protection plate (5) which is arranged in front of a contactor (9) and is configured to isolate an electric arc generated when the contactor (9) works, and a reset key (7) of the contactor (9) is pressed down in a normal working state and bounces up in a power-off protection state; the reset rod (1) penetrates through the protection plate (5), and the inner end of the reset rod (1) leaves the reset key (7) in a normal working state; in the power-off protection state, the reset rod (1) is configured to receive external force through the outer end and move relative to the protection plate (5) so as to press the reset key (7) through the inner end. The device can be under the condition that need not to dismantle the protection shield, and the quick reset contactor can improve production efficiency because of the warning that overload protection action appears, reduces maintenance work volume.
Description
Technical Field
The disclosure relates to the technical field of tobacco industry, in particular to a relay protection resetting device and an air compressor of tobacco processing equipment.
Background
Because of air compressor distribution system is located inside the organism, the unit vibration of operation in-process passes through the body and transmits the distribution part, and the distribution part includes the contactor for the air compressor loading subtracts the load, belongs to high current contactor, and in air compressor operation in-process, for preventing the contactor contact electric arc that loading subtracts the load in-process and produce from drawing the electric energy impact of arc, at the mountable insulating protection shield in contactor the place ahead.
Through the installation insulation protection board, improved the anti breakdown voltage ability of air compressor, can effectively keep apart the electric arc effect that the operation in-process produced, because the vibration of air compressor body operation, this insulation protection board need be fixed in on the air compressor through a plurality of screws.
When overload protection action is carried out in the loading and unloading process of the air compressor, the coil is triggered to be powered off, and therefore the power supply is cut off. At the moment, the contactor reset key pops up, and the normal operation of the power distribution system of the air compressor can be recovered only by manually pressing the contactor reset key.
The insulation protection board needs to be taken down when resetting, the process of taking down the insulation protection board is relatively complex, the operation process needs the main power supply of the brake-off air compressor for ensuring safety, and each screw on the insulation protection board is disassembled, so that the insulation protection board is taken down to reset, the complex process influences the recovery time of the equipment, the operation efficiency of the equipment is also influenced, and meanwhile, certain potential safety hazards also exist.
Disclosure of Invention
The utility model aims at providing a relay protection resetting means and tobacco processing equipment's air compressor, can improve the convenience that the relay resets.
In order to achieve the above object, a first aspect of the present disclosure provides a relay protection resetting apparatus, including:
a protection plate arranged in front of the contactor and configured to isolate an arc generated when the contactor operates, wherein a reset key of the contactor is pressed in a normal operating state and bounces up in a power-off protection state; and
the reset rod penetrates through the protective plate, and the inner end of the reset rod leaves the reset key in a normal working state; in the power-off protection state, the reset rod is configured to receive external force through the outer end and move relative to the protection plate so as to press the reset key through the inner end.
In some embodiments, the inner end of the reset lever is higher than the top of the reset key after being bounced under normal operation.
In some embodiments, the reset key is arranged opposite to the protection plate, and the reset rod moves along the self axial direction to press the reset key.
In some embodiments, the reduction device further comprises a guide member, the protection plate is provided with a first through hole, the guide member is arranged in the first through hole, the guide member is provided with a second through hole, and the reduction rod is arranged in the second through hole in a penetrating manner.
In some embodiments, the guide member is provided with a thrust portion which abuts against an outer side surface of the protection plate.
In some embodiments, the reset device further comprises a reset element disposed between the reset rod and the protection plate and configured to restore the reset rod to an initial position after the external force on the reset rod is released.
In some embodiments, the reset key is arranged opposite to the protection plate, and the reset rod moves along the self axial direction to press the reset key;
the relay protection resetting device further comprises a limiting part, the resetting element comprises a spring, the outer end of the resetting rod is sleeved with the spring, one end of the spring is abutted against the protection plate, and the other end of the spring is abutted against the limiting part.
In some embodiments, the installation position of the limiting member relative to the reset rod can be adjusted along the axial direction.
In some embodiments, the limiting member includes a nut, the outer end of the restoring rod is a threaded section, and the nut is screwed on the threaded section to limit the spring.
In some embodiments, the reset rod is provided with a limiting part at a position inside the protection plate for limiting the limit position of outward movement of the reset rod.
In some embodiments, the reset device further includes a position maintaining member configured to limit movement of the reset lever in the locked state and to allow movement of the reset lever in the unlocked state.
In order to achieve the above object, a second aspect of the present disclosure provides an air compressor of a tobacco processing device, including the relay protection resetting device of the above embodiment.
Based on the technical scheme, the relay protection resetting device is provided with the resetting rod penetrating through the protection plate, and the inner end of the resetting rod leaves the resetting key in a normal working state; in the power-off protection state, the reset rod is configured to receive external force through the outer end and move relative to the protection plate so as to press the reset key through the inner end. The relay protection resetting device can rapidly reset the alarm of the contactor due to the overload protection action under the condition that the protection plate does not need to be detached, so that the production efficiency can be improved, and the maintenance workload can be reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a relay protection resetting device according to the present disclosure;
fig. 2 is a schematic structural diagram of an embodiment of a reset rod in the relay protection resetting device of the disclosure.
Description of the reference numerals
1. A reset lever; 2. a limiting member; 3. a gasket; 4. a reset element; 5. a protection plate; 6. a guide member; 61. a thrust part; 62. a main body portion; 7. a reset key; 8. a contactor protector; 9. a contactor; 10. a body; 11. a threaded segment; 12. a screw; 13. and a nut.
Detailed Description
The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.
In the description of the present disclosure, it is to be understood that the terms "inner", "outer", "upper", "lower", "left", and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present disclosure, and do not indicate or imply that the device referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the scope of the present disclosure.
As shown in fig. 1, the present disclosure provides a relay protection resetting device, which in some embodiments comprises a protection plate 5 and a resetting rod 1.
Taking the air compressor as an example for explanation, the power distribution part in the air compressor comprises a contactor 9 for loading and unloading the air compressor, belongs to a high-current contactor, and is provided with a protection plate 5 in front of the contactor 9 in order to prevent the electric energy impact of arc discharge of a contact of the contactor 9 generated in the loading and unloading process during the operation process of the air compressor. The protection plate 5 is configured to isolate an arc generated when the contactor 9 operates, and may be an insulating protection plate. The front of the contactor 9 is a side far from the installation end of the contactor 9. Through installation protection shield 5, improved the anti breakdown voltage ability of air compressor, can effectively keep apart the electric arc effect that produces in the operation process.
Due to the vibration of the operation of the air compressor body, the protection plate 5 can be fixed on the body 10 of the air compressor through a plurality of screws 12, for example, four screws 12 are arranged to be fixedly installed, the first ends of the screws 12 can be screwed into the installation holes of the body 10 and fixed through nuts 13, the second ends of the screws pass through the protection plate 5, and the protection plate 5 is locked and fixed on two sides of the protection plate 5 through the nuts 13.
One side of contactor 9 is equipped with contactor protector 8 to carry out overload protection at air compressor loading deloading in-process, can trigger the coil outage when overload protection, thereby the cut-off power supply. The reset key 7 of the contactor 9 is pressed in the normal operation state and bounces in the power-off protection state. To continue the operation, the reset key 7 needs to be pressed again.
The reset rod 1 penetrates through the protective plate 5, and the inner end of the reset rod 1 leaves the reset key 7 in a normal working state; in the power-off protection state, the reset lever 1 is configured to receive an external force through an outer end to move relative to the protection plate 5 to press the reset key 7 through an inner end. The release link 1 can be made of an insulating material, and the requirement on the pressing strength and the requirement on the working environment can be met.
The relay protection resetting device can quickly reset the alarm of the contactor due to overload protection action, does not need to disassemble a protection plate, does not need a main power supply of an air compressor of a separating brake, can simplify the operation process, reduces the maintenance workload, and improves the operation safety. By adopting the resetting device, when the contactor is reset, the time required by the recovery equipment can be shortened, and the influence of contactor power-off protection on the operation efficiency of the air compressor can be reduced, so that the tobacco production efficiency is improved.
Such a reset device can be moved by manual operation, for example, by applying a pressing force to the outer end of the manual phase reset lever 1. Or the reset device can be automatically reset, the reset device comprises a control part and a driving mechanism, the driving mechanism is connected with the outer end of the reset rod 1, and the control part is configured to enable the driving mechanism to act to press the reset rod 1 to move when receiving a signal that the contactor 9 is disconnected and the reset key 7 is bounced.
In some embodiments, the inner end of the reset lever 1 is higher than the top of the reset key 7 after being bounced under normal operation. The arrangement mode can enable the reset key 7 to be successfully bounced up when the air compressor carries out overload protection in the load increasing and reducing process, and the working safety of the air compressor is guaranteed.
In some embodiments, the release lever 1 passes through the protection plate 5, the release key 7 of the contact 9 is located at the side, a guide groove may be provided on the protection plate 5, and the release lever 1 may move along the guide groove in a direction perpendicular to its axis to press the release key 7 through the side of the inner end of the release lever 1, or a bent portion may be provided at the inner end of the release lever 1 and press the release key 7 through the end surface of the bent portion. This embodiment can reduce the operating space required along the axial direction of the restoring rod 1 outside the protective plate 5.
In some embodiments, the reset key 7 is located above the contactor protector 8, opposite to the protection plate 5, and the reset lever 1 moves axially along itself to press the reset key 7. This embodiment has a simple structure, can reduce the operation space required around the reset lever 1, and is convenient for applying an external force to press the reset key 7. The following embodiments are given on the basis of this structure.
As shown in fig. 1, the resetting device of the present disclosure further includes a guide 6, the protection plate 5 is provided with a first through hole, the guide 6 is arranged in the first through hole, the guide 6 is provided with a second through hole, and the resetting rod 1 is arranged in the second through hole in a penetrating manner. For example, the guiding member 6 may be a cylindrical sleeve structure, and the restoring rod 1 may be a cylindrical elongated rod structure. The guide member 6 may be made of a material having a low coefficient of friction, such as teflon or the like.
Through setting up guide 6, can make release link 1 move under the guide effect of second through-hole, improve the motion stationarity, prevent that release link 1 from taking place the jamming because rocking the swing in the motion process, make the inner of release link 1 can aim at and press it with reset key 7.
Specifically, the guide 6 includes a main body portion 62 and a thrust portion 61 forming a stepped cylindrical structure, the thrust portion 61 abutting on the outer side surface of the protection plate 5. The guide 6 is fitted from the outside of the shield plate 5, and the guide 6 can be reliably attached to the shield plate 5 by providing the thrust portion 61.
In some embodiments, the resetting device of the present disclosure further includes a resetting element 4 disposed between the resetting rod 1 and the protection plate 5, and configured to restore the resetting rod 1 to the initial position after the external force on the resetting rod 1 is released. After the reset key 7 is pressed down through the reset rod 1, the external force on the reset rod 1 is released, and the reset rod 1 can be automatically restored to the initial position through the reset element 4 without manual auxiliary operation, so that the reset key 7 can be pressed down through applying the external force again after the overload protection is carried out next time.
Referring to fig. 1, the reset key 7 is disposed to face the protection plate 5, and the reset lever 1 moves axially along itself to press the reset key 7. The resetting device further comprises a limiting part 2, the resetting element 4 comprises a spring, such as a compression spring, the outer end of the resetting rod 1 is sleeved with the spring, one end of the spring is abutted against the protection plate 5, and the other end of the spring is abutted against the limiting part 2.
The spring is sleeved at the outer end of the reset rod 1, the direction of the elastic restoring force of the spring is just consistent with the axial direction of the reset rod 1, and the reset rod 1 can be smoothly restored to the initial position. Through setting up locating part 2, can inject the spring in certain length space to the elasticity that guarantees the spring and produce restores to the throne size, makes release link 1 can reliably bounce back to initial position after pressing reset key 7, when pressing release link 1 in addition, also has certain hand power, does benefit to the operation, also can provide the cushion effect for pressing reset key 7, prevents to damage reset key 7.
Further, the mounting position of the limiting member 2 with respect to the restoring rod 1 is adjustable in the axial direction. Through the position of adjusting locating part 2, resistance and the resilience force of spring to release link 1 when adjustable release link 1 is pressed to be applicable to the reset key 7 that needs different pressure intensity.
With reference to fig. 1 and 2, the limiting member 2 includes a nut, the outer end of the release link 1 is a threaded section 11, and the nut is screwed on the threaded section 11 to limit the spring. The nut can be used for reliably limiting the spring, and the pretightening force of the spring can be conveniently adjusted by screwing the nut. The outer end of release link 1 surpasss the outer end of nut and predetermines the distance to reserve sufficient adjustment space, it is different between 5 at the protective plate and the reset key 7 apart from, perhaps the required pressing force degree of reset key 7 is different, the homoenergetic adjusts, with the commonality that improves resetting means.
Further, in order to improve the force stability of the spring, a spacer may be disposed between the nut and a section of the spring, and the other end of the spring may abut against the thrust portion 61 of the guide 6 to increase the supporting area of the spring. The nut is required to be locked firmly and not to be loosened, the tightening torque is proper, the spring and the nut can be protected by the gasket, and the pressure between the nut and the spring is dispersed.
In some embodiments, not shown in the drawings, the reset lever 1 is provided with a limiting portion at a position inside the protection plate 5 for limiting a limit position of the reset lever 1 moving outward. When outwards moving release link 1, spacing portion is blockked by guide 6, plays the effect that prevents to deviate from, makes resetting means keep on protection plate 5, can use at any time when taking place the power protection.
In the embodiment without the limiting portion, after the reset key 7 is pressed, the reset lever 1 can be pulled out and stored for the next use. In this way, the state of the reset key 7 can be prevented from being influenced by the misoperation of the reset rod 1 caused by external force in the normal working state of the contactor 9, and the reliability of the normal working state is improved.
In some embodiments, the reset device of the present disclosure further includes a position maintaining member configured to restrict the reset lever 1 from moving in the locked state and to allow the reset lever 1 to move in the unlocked state. After the contactor 9 is power-off protected and the reset key 7 is pressed by the reset lever 1, the position maintaining part is switched to the locking state, and after the contactor 9 is power-off protected, the position maintaining part is unlocked to allow the reset lever 1 to move to press the reset key 7.
The embodiment can release the locking state of the reset rod 1 only after power-off protection, and realize the reset function of the reset key 7; and under the normal operating condition of the contactor 9, the state that the reset key 7 is influenced by the misoperation of the reset rod 1 caused by external force can be prevented, and the reliability of the operation of the equipment is improved.
The operation method of the reset device of the present disclosure is described below with reference to fig. 1 as an example: the manual acting force is applied to the reset rod 1, and the external force is transmitted to the reset key 7 of the contactor 9 along the axial direction of the reset rod 1 by overcoming the resistance of the spring, so that the overload protection action reset of the relay is completed.
After the reset is completed, the reset rod 1 automatically extends outwards to an initial position under the action of the pretightening force of the spring, the reset device is in a cold standby state at the moment, the spring is required to move sensitively, the pretightening force is proper, and the size and the actual acting force requirements of the reset rod 1 are met. The reset device has the characteristics of simple structure, good contact and aging resistance.
Secondly, this disclosure still provides an air compressor of tobacco processing equipment, including the relay protection resetting means of above-mentioned embodiment.
Through the experiment, if set up 10 air compressor, if reset key 7 resets through dismantling protection shield 5, then reset time needs 30 minutes, influences production efficiency, increases maintenance work volume. After the resetting device disclosed by the invention is adopted, when power-off protection occurs, the switching-off power supply does not need to detach the insulating protection board, and the resetting of the relay protection device can be completed within 1 minute, so that the maintenance workload is greatly reduced, the production efficiency of tobacco can be improved, and the whole production process is more continuous.
The relay protection resetting device and the air compressor of the tobacco processing equipment provided by the disclosure are described in detail above. The principles and embodiments of the present disclosure are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present disclosure. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.
Claims (12)
1. A relay protection resetting device is characterized by comprising:
the protection plate (5) is arranged in front of the contactor (9) and is configured to isolate electric arcs generated when the contactor (9) works, and a reset key (7) of the contactor (9) is pressed under a normal working state and bounces under a power-off protection state; and
the reset rod (1) penetrates through the protection plate (5), and the inner end of the reset rod (1) leaves the reset key (7) in the normal working state; in the power-off protection state, the reset rod (1) is configured to receive external force through the outer end and move relative to the protection plate (5) so as to press the reset key (7) through the inner end.
2. Relay protection resetting device according to claim 1, wherein in the normal operating state, the inner end of the reset lever (1) is higher than the top of the reset key (7) after bouncing up.
3. Relaying protection resetting means according to claim 1, characterized in that said reset key (7) is arranged opposite to said protection plate (5), said reset rod (1) moving axially along itself to press said reset key (7).
4. The relaying protection resetting device according to claim 3, further comprising a guiding member (6), wherein a first through hole is formed on the protection plate (5), the guiding member (6) is disposed in the first through hole, a second through hole is formed on the guiding member (6), and the reset rod (1) is inserted into the second through hole.
5. Relay protection resetting device according to claim 4, characterized in that a thrust (61) is provided on the guide (6), said thrust (61) abutting against an outer side of the protection plate (5).
6. The relaying protection resetting device according to claim 1, further comprising a resetting member (4) provided between the resetting rod (1) and the protecting plate (5) and configured to restore the resetting rod (1) to an initial position after the external force on the resetting rod (1) is released.
7. Relay protection resetting device according to claim 6, wherein the reset key (7) is arranged opposite to the protection plate (5), and the reset rod (1) moves axially along itself to press down the reset key (7);
the relay protection resetting device further comprises a limiting part (2), the resetting element (4) comprises a spring, the outer end of the resetting rod (1) is sleeved with the spring, one end of the spring is abutted against the protective plate (5), and the other end of the spring is abutted against the limiting part (2).
8. Relaying protection reset device according to claim 7, characterized in that the mounting position of the limit stop (2) with respect to the reset rod (1) is axially adjustable.
9. The relaying protection resetting means of claim 7 or 8, wherein said limiting member (2) comprises a nut, the outer end of said reset rod (1) is a threaded section (11), and said nut is screwed on said threaded section (11) to limit said spring.
10. The relaying protection resetting device according to claim 1, wherein a position of the resetting rod (1) inside the protecting plate (5) is provided with a limiting portion for limiting a limit position of the resetting rod (1) moving outward.
11. Relay protection reset device according to claim 1, further comprising a position maintaining member configured to limit the movement of the reset lever (1) in a locked state and to allow the movement of the reset lever (1) in an unlocked state.
12. An air compressor of a tobacco processing device, characterized by comprising the relay protection resetting device of any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619616.1A CN111383862A (en) | 2018-12-28 | 2018-12-28 | Relay protection resetting means and tobacco processing equipment's air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811619616.1A CN111383862A (en) | 2018-12-28 | 2018-12-28 | Relay protection resetting means and tobacco processing equipment's air compressor |
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| Publication Number | Publication Date |
|---|---|
| CN111383862A true CN111383862A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811619616.1A Pending CN111383862A (en) | 2018-12-28 | 2018-12-28 | Relay protection resetting means and tobacco processing equipment's air compressor |
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| CN (1) | CN111383862A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202758821U (en) * | 2012-08-31 | 2013-02-27 | 华自科技股份有限公司 | Electrothermal relay resetting mechanism outside cabinet |
| EP2942799A1 (en) * | 2014-05-07 | 2015-11-11 | Siemens Aktiengesellschaft | Protective switching device with two trigger mechanisms with different lever ratios |
| CN105304425A (en) * | 2015-10-16 | 2016-02-03 | 陈泽 | Safe ground fault circuit interrupter and control method thereof |
| CN209045439U (en) * | 2018-12-28 | 2019-06-28 | 龙岩烟草工业有限责任公司 | The air compressor of relay protection resetting apparatus and tobacco processing equipment |
-
2018
- 2018-12-28 CN CN201811619616.1A patent/CN111383862A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202758821U (en) * | 2012-08-31 | 2013-02-27 | 华自科技股份有限公司 | Electrothermal relay resetting mechanism outside cabinet |
| EP2942799A1 (en) * | 2014-05-07 | 2015-11-11 | Siemens Aktiengesellschaft | Protective switching device with two trigger mechanisms with different lever ratios |
| CN105304425A (en) * | 2015-10-16 | 2016-02-03 | 陈泽 | Safe ground fault circuit interrupter and control method thereof |
| CN209045439U (en) * | 2018-12-28 | 2019-06-28 | 龙岩烟草工业有限责任公司 | The air compressor of relay protection resetting apparatus and tobacco processing equipment |
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