CN106783435B - A kind of earth leakage protective device and its earth leakage protecting method - Google Patents
A kind of earth leakage protective device and its earth leakage protecting method Download PDFInfo
- Publication number
- CN106783435B CN106783435B CN201710078357.5A CN201710078357A CN106783435B CN 106783435 B CN106783435 B CN 106783435B CN 201710078357 A CN201710078357 A CN 201710078357A CN 106783435 B CN106783435 B CN 106783435B
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- China
- Prior art keywords
- spring
- movable contact
- earth leakage
- contact spring
- holder
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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
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention discloses a kind of earth leakage protective device, including current transformer, controller, tripping mechanism；Tripping mechanism includes pedestal, it is fixed with insulation board and holder on pedestal, movable contact spring is hinged on holder, movable contact spring bottom is connect by resetting spring with holder, cradle top is fixed with static contact, electromagnet is provided on pedestal, when the solenoid is energized, electromagnet attracts downwards the end of movable contact spring, the top of movable contact spring is rotated up to be contacted with static contact, when the electromagnet is powered off, resetting spring pulls downward on the top of movable contact spring, and the top of movable contact spring is made to be contacted with insulation board；Static contact outer ledge is provided with the first groove, and the top of movable contact spring is connected with short-contact metal bar by elastic sheet metal, and when movable contact spring is contacted with static contact, short-contact metal bar is in contact with the first groove.The present invention can improve the deficiencies in the prior art, simplify the process of self-test of earth leakage protective device, improve accuracy of judgement degree of the earth leakage protective device for situation of leaking electricity.
Description
Technical field
The present invention relates to electric leakage protection technology field, especially a kind of earth leakage protective device and its earth leakage protecting method.
Background technology
Earth leakage protective device is to play safety by automaticallyying cut off the power when the safety problems such as electric leakage occur for electricity system
The equipment of protective effect.104319202 B of Chinese invention patent CN disclose a kind of control device for earth leakage protective device,
The self checking structure of this earth leakage protective device is complicated, and needs to carry out power operation.
Invention content
The technical problem to be solved in the present invention is to provide a kind of earth leakage protective device and its earth leakage protecting method, can solve existing
The deficiency for having technology simplifies the process of self-test of earth leakage protective device, and it is accurate for the judgement for situation of leaking electricity to improve earth leakage protective device
Exactness.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
A kind of earth leakage protective device, it is characterised in that：Including,
Current transformer, for detecting leakage current；
Controller carries out electric leakage situation judgement by the testing result of current transformer；
Tripping mechanism, for implementing trip action according to the signal of controller；
Tripping mechanism includes pedestal, and insulation board and holder are fixed on pedestal, and movable contact spring, movable contact spring bottom are hinged on holder
Portion is connect by resetting spring with holder, and cradle top is fixed with static contact, and electromagnet is provided on pedestal, when electromagnet is powered
When, electromagnet attracts downwards the end of movable contact spring, and the top of movable contact spring is rotated up to be contacted with static contact, when electromagnet powers off
When, resetting spring pulls downward on the top of movable contact spring, and the top of movable contact spring is made to be contacted with insulation board；Static contact outer ledge is set
It is equipped with the first groove, the top of movable contact spring is connected with short-contact metal bar by elastic sheet metal, when movable contact spring is contacted with static contact
When, short-contact metal bar is in contact with the first groove.
Preferably, the top of the movable contact spring is provided with lug boss, the side of lug boss is provided with arc-shaped spring piece, quiet
Contact bottom surface is provided with is provided with damping layer, damping layer and arc with matched second groove of lug boss, the side wall of the second groove
Shape spring leaf is interference fitted, and is provided with through-hole at the top of the second groove, cylinder is provided at the top of static contact, cylinder piston is located at
In through-hole.
Preferably, the junction of the movable contact spring and resetting spring is provided with sliding slot, is slided in sliding slot and is provided with sliding block,
Hook is provided on sliding block, hook inside is provided with rubber liner, and the thickness at rubber liner centre position is less than rubber liner two
The thickness of side is provided with the first spring body in rubber liner.
Preferably, the junction of the holder and resetting spring is set to connecting shaft, connecting shaft and holder are connected with the
Two spring bodies, resetting spring are connected to by cross holder in connecting shaft.
Detection data is sent in controller by a kind of earth leakage protecting method of above-mentioned earth leakage protective device, current transformer,
Controller classifies to detection data, and pulse data is deleted, and then remaining detection data is normalized
Processing, according to size and the duration of treated data obtain leakage current, finally according to the size of leakage current and it is lasting when
Between weighted average data determine whether carry out trip action.
Preferably, when being normalized, when using the covariance of pending data as normalized
Scaling coefficient.
It is using advantageous effect caused by above-mentioned technical proposal：The configuration of the present invention is simple may be implemented not power off
Quick self-checking, it is high for electric leakage risk control accuracy, reduce influence of the unrelated interruptions for earth leakage protective device.
Description of the drawings
Fig. 1 is the structure chart of a specific implementation mode of the invention.
Fig. 2 is the structure chart of tripping mechanism in a specific implementation mode of the invention.
Fig. 3 is the structure chart of movable contact spring and static contact contact position in a specific implementation mode of the invention.
Fig. 4 is the structure chart of movable contact spring and resetting spring link position in a specific implementation mode of the invention.
Fig. 5 is the structure chart of holder and resetting spring link position in a specific implementation mode of the invention.
Fig. 6 is the structure chart of filter circuit in a specific implementation mode of the invention.
Specific implementation mode
The standardized element used in the present invention can commercially, and shaped piece is according to specification and attached drawing
Record can carry out customized, and the specific connection type of each part is all made of bolt ripe in the prior art, rivet, weldering
The conventional means such as connect, paste, this will not be detailed here.
Referring to Fig.1-6, a specific implementation mode of the invention includes,
Current transformer 1, for detecting leakage current；
Controller 2 carries out electric leakage situation judgement by the testing result of current transformer 1；
Tripping mechanism 3, for implementing trip action according to the signal of controller 2；
Tripping mechanism 3 includes pedestal 4, is fixed with insulation board 5 and holder 6 on pedestal 4, movable contact spring 7 is hinged on holder 6,
7 bottom of movable contact spring is connect by resetting spring 8 with holder 6, and 6 top of holder is fixed with static contact 9, and electromagnetism is provided on pedestal 4
Iron 10, when electromagnet 10 is powered, electromagnet 10 attracts downwards the end of movable contact spring 7, the top of movable contact spring 7 be rotated up with
Static contact 9 contacts, and when electromagnet 10 powers off, resetting spring 8 pulls downward on the top of movable contact spring 7, makes the top of movable contact spring 7
It is contacted with insulation board 5；9 outer ledge of static contact is provided with the first groove 12, and the top of movable contact spring 7 is connected by elastic sheet metal 13
It is connected to short-contact metal bar 14, when movable contact spring 7 is contacted with static contact 9, short-contact metal bar 14 is in contact with the first groove 12.
The top of movable contact spring 7 is provided with lug boss 11, and the side of lug boss 11 is provided with arc-shaped spring piece 15, static contact 9
Bottom surface is provided with is provided with damping layer 17, damping layer with 11 matched second groove 16 of lug boss, the side wall of the second groove 16
17 are interference fitted with arc-shaped spring piece 15, and the top of the second groove 16 is provided with through-hole 18, and the top of static contact 9 is provided with cylinder
19, cylinder piston is located in through-hole 18.
The top of movable contact spring 7 is additionally provided with the first metal clips 28, and the both sides of the first metal clips 28 are provided with rubber lining
Pad 29, the first metal clips 28 are located at the outside of lug boss 11, and 9 bottom surface of static contact is hinged, and there are two the second metal clips 30, move
When contact 7 is contacted with static contact 9, rubber packing 29 is crimped with the second metal clips 30, and the second metal clips 30 is sent out under stress
Raw rotation, is in contact with the first metal clips 28.
The junction of movable contact spring 7 and resetting spring 8 is provided with sliding slot 20, is slided in sliding slot 20 and is provided with sliding block 21, sliding block
Hook 22 is provided on 21,22 inside of hook is provided with rubber liner 23, and the thickness at 23 intermediate position of rubber liner is less than rubber
The thickness at 23 both sides position of liner is provided with the first spring body 24 in rubber liner 23.
The junction of holder 6 and resetting spring 8 is set to connecting shaft 25, and connecting shaft 25 is connected with second spring with holder 6
Body 26, resetting spring 8 are connected to by cross holder 27 in connecting shaft 25.
In order to further increase accuracy of the controller 2 for detection signal analysis, set in the signal input part of controller 2
Set filter circuit.The input terminal of filter circuit is connected to the first amplifier A1's by concatenated first inductance L1 and first resistor R1
Normal phase input end is connected to the output end of the first amplifier A1 by the first capacitance C1 between the first inductance L1 and first resistor R1,
The normal phase input end of first amplifier is connect by the second capacitance C2 ground connection, the inverting input of the first amplifier A1 by second resistance R2
Ground, the inverting input of the first amplifier A1 are connected to the output end of the first amplifier A1 by 3rd resistor R3, the first inductance L1 and
The base stage of triode Q is connected between first resistor R1 by the 4th resistance R4, the base stage of triode Q is connected to triode Q's
The emitter of collector, triode Q is grounded by third capacitance C3, and the emitter of triode Q is connected to by the 5th resistance R5
The inverting input of first amplifier A1.Wherein, first resistor R1 is 35k Ω, second resistance R2 is 7k Ω, 3rd resistor R3 is
10k Ω, the 4th resistance R4 are 15k Ω, the 5th resistance R5 is 3.5k Ω, and the first inductance L1 is 0.25mH, and the first capacitance C1 is 230
μ F, the second capacitance C2 are 500 μ F, third capacitance C3 is 50 μ F.
Detection data is sent to controller 2 by a kind of earth leakage protecting method of above-mentioned earth leakage protective device, current transformer 1
In, controller 2 classifies to detection data, and pulse data is deleted, and then returns remaining detection data
One change is handled, and according to size and the duration of treated data obtain leakage current, finally according to the size of leakage current and is held
The weighted average data of continuous time determine whether to carry out trip action.When being normalized, pending data is used
Scaling coefficient when covariance is as normalized.
The present invention can improve the action accuracy of earth leakage protective device, and realization does not power off self-test.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is merely for convenience of the description present invention, does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of earth leakage protective device, it is characterised in that：Including,
Current transformer (1), for detecting leakage current；
Controller (2) carries out electric leakage situation judgement by the testing result of current transformer (1)；
Tripping mechanism (3), for implementing trip action according to the signal of controller (2)；
Tripping mechanism (3) includes pedestal (4), and insulation board (5) and holder (6) are fixed on pedestal (4), and holder is hinged on (6)
Movable contact spring (7), movable contact spring (7) bottom are connect by resetting spring (8) with holder (6), and static contact is fixed at the top of holder (6)
(9), it is provided with electromagnet (10) on pedestal (4), when electromagnet (10) are powered, electromagnet (10) is by the end of movable contact spring (7)
Attracting downwards, the top of movable contact spring (7) is rotated up to be contacted with static contact (9), when electromagnet (10) power off, resetting spring
(8) top of movable contact spring (7) is pulled downward on, the top of movable contact spring (7) is made to be contacted with insulation board (5)；Static contact (9) outer side edges
Edge is provided with the first groove (12), and the top of movable contact spring (7) is connected with short-contact metal bar (14) by elastic sheet metal (13), when
When movable contact spring (7) is contacted with static contact (9), short-contact metal bar (14) is in contact with the first groove (12)；
The top of the movable contact spring (7) is provided with lug boss (11), and the side of lug boss (11) is provided with arc-shaped spring piece (15),
Static contact (9) bottom surface is provided with to be provided with matched second groove (16) of lug boss (11), the side wall of the second groove (16)
Damping layer (17), damping layer (17) are interference fitted with arc-shaped spring piece (15), and the second groove is provided with through-hole at the top of (16)
(18), cylinder (19) is provided at the top of static contact (9), cylinder piston is located in through-hole (18).
2. earth leakage protective device according to claim 1, it is characterised in that：The company of the movable contact spring (7) and resetting spring (8)
The place of connecing is provided with sliding slot (20), is slided in sliding slot (20) and is provided with sliding block (21), hook (22) is provided on sliding block (21), linked up with
(22) inside is provided with rubber liner (23), and the thickness at the intermediate position of rubber liner (23) is less than rubber liner (23) both sides position
Thickness, is provided with the first spring body (24) in rubber liner (23).
3. earth leakage protective device according to claim 2, it is characterised in that：The connection of the holder (6) and resetting spring (8)
Place is set to connecting shaft (25), and connecting shaft (25) is connected with second spring body (26) with holder (6), and resetting spring (8) passes through ten
Font holder (27) is connected in connecting shaft (25).
4. a kind of earth leakage protecting method of the earth leakage protective device described in claim 1-3 any one, it is characterised in that：Electric current is mutual
Detection data is sent in controller (2) by sensor (1), and controller (2) classifies to detection data, by pulse data into
Row is deleted, and then remaining detection data is normalized, according to the size of treated data obtain leakage current and
Duration finally determines whether to carry out trip action according to the weighted average data of the size of leakage current and duration.
5. the earth leakage protecting method of earth leakage protective device according to claim 4, it is characterised in that：It is being normalized
When, scaling coefficient when using the covariance of pending data as normalized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078357.5A CN106783435B (en) | 2017-02-14 | 2017-02-14 | A kind of earth leakage protective device and its earth leakage protecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710078357.5A CN106783435B (en) | 2017-02-14 | 2017-02-14 | A kind of earth leakage protective device and its earth leakage protecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106783435A CN106783435A (en) | 2017-05-31 |
| CN106783435B true CN106783435B (en) | 2018-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710078357.5A Expired - Fee Related CN106783435B (en) | 2017-02-14 | 2017-02-14 | A kind of earth leakage protective device and its earth leakage protecting method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2295275B (en) * | 1994-11-15 | 1998-08-12 | Matsushita Electric Works Ltd | Circuit breaker |
| CN201199630Y (en) * | 2008-04-30 | 2009-02-25 | 淄博卓尔电器有限公司 | Leakage protector with zero-off protection |
| CN102087311A (en) * | 2010-12-21 | 2011-06-08 | 彭浩明 | Method for improving measurement accuracy of power mutual inductor |
| CN103824734A (en) * | 2014-03-13 | 2014-05-28 | 科都电气有限公司 | Electric leakage protector |
-
2017
- 2017-02-14 CN CN201710078357.5A patent/CN106783435B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2295275B (en) * | 1994-11-15 | 1998-08-12 | Matsushita Electric Works Ltd | Circuit breaker |
| CN201199630Y (en) * | 2008-04-30 | 2009-02-25 | 淄博卓尔电器有限公司 | Leakage protector with zero-off protection |
| CN102087311A (en) * | 2010-12-21 | 2011-06-08 | 彭浩明 | Method for improving measurement accuracy of power mutual inductor |
| CN103824734A (en) * | 2014-03-13 | 2014-05-28 | 科都电气有限公司 | Electric leakage protector |
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| Publication number | Publication date |
|---|---|
| CN106783435A (en) | 2017-05-31 |
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Granted publication date: 20180814 Termination date: 20210214 |