CN208272611U - A kind of detection and protection apparatus for leakage with delay function - Google Patents
A kind of detection and protection apparatus for leakage with delay function Download PDFInfo
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- CN208272611U CN208272611U CN201820990098.3U CN201820990098U CN208272611U CN 208272611 U CN208272611 U CN 208272611U CN 201820990098 U CN201820990098 U CN 201820990098U CN 208272611 U CN208272611 U CN 208272611U
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- 238000001514 detection method Methods 0.000 title claims abstract description 62
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 26
- 239000010703 silicon Substances 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000012360 testing method Methods 0.000 claims description 8
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 5
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to electric control technical field, in particular to a kind of detection and protection apparatus for leakage with delay function, power circuit, step-down rectifying circuit, electric-leakage detection circuit and magnetic silicon controlled switch circuit including sequential connection；It further include electric leakage sensor circuit, the leakage inductance answers circuit on one side to connect with the step-down rectifying circuit, and the other end is connect with the electric-leakage detection circuit；Delay adjustment circuit is also connected between the electric-leakage detection circuit and the magnetic silicon controlled switch circuit；The power circuit includes phase line L and zero curve N, is connect respectively with the step-down rectifying circuit；The magnetic silicon controlled switch circuit is connect with tripping coil, and when magnetic silicon controlled switch circuit conducting, the tripping coil is connected over the ground to be formed into a loop with the magnetic silicon controlled switch circuit.The present apparatus is not only simple in structure, at low cost, and detection efficiency is high, and can realize long delay earth leakage protective by adjusting delay adjustment circuit.
Description
Technical field
The utility model relates to electric control technical field more particularly to a kind of current leakage detection protection dresses with delay function
It sets.
Background technique
With popularizing for electric car, popularizing for corresponding automobile charging Denso carrys out many conveniences of band to automobile, still
During electricity consumption, due to electrical equipment defect itself or improper use etc., it is possible to will lead to charging equipment electric leakage
The generation of phenomenon, property and life security to people bring harm, such as: the spark that charging pile electric leakage generates may lead to fire
Therefore calamity, explosion, electric shock, are just particularly important the detection of electrical leakage of charging pile it is also possible to cause personal injury.In addition,
Reverse-blocking tetrode thyristor involved in existing earth leakage protective device is easy to the punch through damage by high pressure, causes very
Big maintenance cost.Currently, it can be used for detecting the device for leaking electricity and having delay protection function, most peripheral circuit is complicated, former
Part and production cost are also very high, and since the shape of earth leakage protective device is all smaller, reserved space is small, to the layout also band of element
Carry out certain puzzlement.Therefore it is badly in need of a kind of at low cost, simple design scheme of structure.
Utility model content
The purpose of the utility model is to overcome above-mentioned problem of the prior art, provide a kind of electric leakage with delay function
Protective device is detected, power circuit, step-down rectifying circuit, electric-leakage detection circuit, electric-leakage detection circuit and reverse-blocking tetrode thyristor are passed through
Circuit is connected with each other, and has achieved the purpose that accurate detection electric leakage can reach delay adjustment function by increasing delay adjustment circuit
Can, realize that long delay earth leakage protective, the present apparatus can not only effectively improve the performance and production efficiency of product, reduce and be produced into
This.
Above-mentioned purpose is to be achieved through the following technical solutions:
A kind of detection and protection apparatus for leakage with delay function, power circuit, step-down rectifying circuit including sequential connection,
Electric-leakage detection circuit and magnetic silicon controlled switch circuit；It further include electric leakage sensor circuit, the leakage inductance answers circuit on one side and the drop
Voltage rectifier connection, the other end are connect with the electric-leakage detection circuit；In the electric-leakage detection circuit and described silicon-controlled open
Delay adjustment circuit is also connected between powered-down road；The power circuit includes phase line L and zero curve N, whole with the decompression respectively
Current circuit connection；The magnetic silicon controlled switch circuit is connect with tripping coil, described de- when magnetic silicon controlled switch circuit conducting
Fastening wire circle is connected over the ground to be formed into a loop with the magnetic silicon controlled switch circuit.
Further, the step-down rectifying circuit includes by varistor RV and by the second diode D2, third diode
The bridge rectifier that D3, the 4th diode D4, the 5th diode D5 are constituted；The anode of the second diode D2 and described
The cathode of third diode D3 is connected to the first end of the bridge rectifier, the anode of the third diode D3 and institute
State the 4th diode D4 anode be connected to the second end of the bridge rectifier, the 4th diode D4 cathode and
The anode of the 5th diode D5 is connected to the cathode at the third end of the bridge rectifier, the 5th diode D5
The 4th end of the bridge rectifier is connected to the cathode of the second diode D2；The side of the varistor RV
It is connect with the power circuit, the other side is connect with the first end of the bridge rectifier and third end respectively, first resistor
The one end R1 is connect with the 4th end of the bridge rectifier, and the other end is connect with the electric-leakage detection circuit.
Further, the first electricity is also connected between the first resistor R1 and the 4th end of the bridge rectifier
Hold C1, the other end ground connection of the first capacitor C1.
Further, it is described electric leakage sensor circuit include be linked in sequence zero sequence current mutual inductor ZCT, second resistance R2,
Bilateral diode Q1,3rd resistor R3, the 4th resistance R4 and the 6th capacitor C6；The zero sequence current mutual inductor ZCT will be sensed
Leakage current clamped by the bilateral diode Q1, and be filtered by the 6th power capacitor C6, through described
The electric-leakage detection circuit is input to after three resistance R3 and the 4th resistance R4 conversion.
Further, the delay adjustment circuit include with the electric-leakage detection circuit be linked in sequence the 7th capacitor C7 and
6th resistance R6, the 7th capacitor C7 are electrolytic capacitor.
Further, the magnetic silicon controlled switch circuit includes reverse-blocking tetrode thyristor SCR, the cathode of the reverse-blocking tetrode thyristor SCR
It connect with the step-down rectifying circuit and the electric-leakage detection circuit, and is grounded by the second capacitor C2 respectively；It is described silicon-controlled
The anode of switch SCR is connect by first diode D1 with the tripping coil.
Further, the electric-leakage detection circuit is electric leakage chip FM2149.
It further, further include testing button circuit, the testing button circuit and the leakage inductance answer circuit connection, use
In the working condition of detection circuit.
Beneficial effect
Alternating voltage is converted to DC voltage by step-down rectifying circuit by the utility model, and is converted into the stabilization of 12V
DC power supply be conveyed to electric-leakage detection circuit；The electric leakage signal in circuit is converted to voltage signal by electric leakage sensor circuit
It is sent to electric-leakage detection circuit leakage, which obtains that a DC voltage is input to through filtering, amplification and rectification can
Transwitch is controlled, triggers and is connected between reverse-blocking tetrode thyristor anode and cathode, electromagnet is connected over the ground, is formed back with reverse-blocking tetrode thyristor
External agency's separating brake is triggered by tripping coil in road.Present apparatus structure is simple, at low cost, and detection efficiency is high, by examining in electric leakage
Increase delay adjustment circuit between slowdown monitoring circuit and magnetic silicon controlled switch circuit, can reach delay adjustment function, realizes long delay electric leakage
Protection.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the detection and protection apparatus for leakage with delay function described in the utility model；
Fig. 2 is a kind of circuit diagram of the detection and protection apparatus for leakage with delay function described in the utility model.
Specific embodiment
The utility model is described in further detail below with reference to figure and embodiment.
As illustrated in fig. 1 and 2, a kind of detection and protection apparatus for leakage with delay function, power circuit including sequential connection,
Step-down rectifying circuit, electric-leakage detection circuit and magnetic silicon controlled switch circuit；It further include electric leakage sensor circuit, the electric leakage sensor circuit
One end is connect with the step-down rectifying circuit, and the other end is connect with the electric-leakage detection circuit；In the electric-leakage detection circuit and
Delay adjustment circuit is also connected between the magnetic silicon controlled switch circuit；The power circuit includes phase line L and zero curve N, difference
It is connect with the step-down rectifying circuit；The magnetic silicon controlled switch circuit is connect with tripping coil, when the magnetic silicon controlled switch circuit
When conducting, the tripping coil is connected over the ground to be formed into a loop with the magnetic silicon controlled switch circuit.
In the present embodiment, the electric-leakage detection circuit is electric leakage chip FM2149.Between the phase line L and zero curve N of power supply
Add alternating current, by increasing varistor RV, for protecting circuit to prevent high-voltage breakdown；By step-down rectifying circuit to detection of electrical leakage
Chip in circuit provides steady dc voltage.
Specifically, the step-down rectifying circuit include by varistor RV and by the second diode D2, third diode D3,
The bridge rectifier that 4th diode D4, the 5th diode D5 are constituted；The anode of the second diode D2 and described
The cathode of three diode D3 is connected to the first end of the bridge rectifier, the anode of the third diode D3 and described
The anode of 4th diode D4 is connected to the second end of the bridge rectifier, the cathode of the 4th diode D4 and institute
State the 5th diode D5 anode be connected to the third end of the bridge rectifier, the 5th diode D5 cathode and
The cathode of the second diode D2 is connected to the 4th end of the bridge rectifier；The side of the varistor RV with
The power circuit connection, the other side are connect with the first end of the bridge rectifier and third end respectively, first resistor R1
One end is connect with the 4th end of the bridge rectifier, and the other end is connect with the electric-leakage detection circuit.
In the present embodiment, first is also connected between the first resistor R1 and the 4th end of the bridge rectifier
The other end of capacitor C1, the first capacitor C1 are grounded, for being filtered to circuit.
The electric leakage sensor circuit includes the zero sequence current mutual inductor ZCT being linked in sequence, second resistance R2, bilateral diode
Q1,3rd resistor R3, the 4th resistance R4 and the 6th capacitor C6；The leakage current that the zero sequence current mutual inductor ZCT will be sensed
Clamped by the bilateral diode Q1, and be filtered by the 6th power capacitor C6, through the 3rd resistor R3 and
The the 4th and the 5th foot of detection of electrical leakage chip in the electric-leakage detection circuit is input to after the 4th resistance R4 conversion.Detection of electrical leakage
The electric leakage signal sensed is obtained a DC voltage by detection of electrical leakage core using amplification filtering, amplification and rectification by circuit
1st foot of piece, is input to the magnetic silicon controlled switch circuit, specifically, the magnetic silicon controlled switch circuit includes reverse-blocking tetrode thyristor
The cathode of SCR, the reverse-blocking tetrode thyristor SCR are connect with the step-down rectifying circuit and the electric-leakage detection circuit respectively, and are led to
Cross the second capacitor C2 ground connection；The anode of the reverse-blocking tetrode thyristor SCR is connect by first diode D1 with the tripping coil.
When the electric leakage signal sensed is obtained a direct current using amplification filtering, amplification and rectification by electric-leakage detection circuit
Voltage passes through the 1st foot of detection of electrical leakage chip, when being input to the magnetic silicon controlled switch circuit, triggers the sun of reverse-blocking tetrode thyristor SCR
It is connected between pole and cathode, the tripping coil in the step-down rectifying circuit is connected over the ground, formed back with reverse-blocking tetrode thyristor SCR
External agency's separating brake is triggered by tripping coil in road.
The delay adjustment circuit in the present embodiment includes the 7th capacitor being linked in sequence with the electric-leakage detection circuit
C7 and the 6th resistance R6, the 7th capacitor C7 are electrolytic capacitor.When there is electric leakage signal, the 8th foot of detection of electrical leakage chip is
High level, power supply charge to the 7th capacitor C7, and when the 7th capacitor C7 reaches reference voltage, detection of electrical leakage chip exports high level,
It triggers and is connected between the anode and cathode of reverse-blocking tetrode thyristor SCR, the tripping coil in the step-down rectifying circuit is connected over the ground,
It is formed into a loop with reverse-blocking tetrode thyristor SCR, external agency's separating brake is triggered by tripping coil.
Testing button circuit is also provided in the present embodiment, the testing button circuit and the electric leakage sensor circuit connect
It connects, the working condition for detection circuit.Specifically, the testing button circuit includes testing button S1, the testing button
Circuit connection is answered by the 7th resistance R7 and the leakage inductance in one end of S1, and the other end is connect with the zero curve N of the power supply.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
Be confined to this, any people for being familiar with the technology is in the technical scope disclosed by the utility model, it is contemplated that variation or replace
It changes all to cover and be within the protection scope of the utility model.Therefore, the protection scope of the utility model should be protected with claim
Subject to the range of shield.
Claims (8)
1. a kind of detection and protection apparatus for leakage with delay function, which is characterized in that power circuit, decompression including sequential connection
Rectification circuit, electric-leakage detection circuit and magnetic silicon controlled switch circuit；It further include electric leakage sensor circuit, the leakage inductance answers circuit on one side
It is connect with the step-down rectifying circuit, the other end is connect with the electric-leakage detection circuit；In the electric-leakage detection circuit and described
Delay adjustment circuit is also connected between magnetic silicon controlled switch circuit；The power circuit includes phase line (L) and zero curve (N), difference
It is connect with the step-down rectifying circuit；The magnetic silicon controlled switch circuit is connect with tripping coil, when the magnetic silicon controlled switch circuit
When conducting, the tripping coil is connected over the ground to be formed into a loop with the magnetic silicon controlled switch circuit.
2. a kind of detection and protection apparatus for leakage with delay function according to claim 1, which is characterized in that the decompression
Rectification circuit includes by varistor (RV) and by the second diode (D2), third diode (D3), the 4th diode (D4),
The bridge rectifier that five diodes (D5) are constituted；The anode and the third diode (D3) of second diode (D2)
Cathode be connected to the first end of the bridge rectifier, the anode of the third diode (D3) and the four or two pole
The anode of pipe (D4) is connected to the second end of the bridge rectifier, the cathode of the 4th diode (D4) and described the
The anode of five diodes (D5) be connected to the third end of the bridge rectifier, the 5th diode (D5) cathode and
The cathode of second diode (D2) is connected to the 4th end of the bridge rectifier；The one of the varistor (RV)
Side is connect with the power circuit, and the other side is connect with the first end of the bridge rectifier and third end respectively, the first electricity
Resistance one end (R1) is connect with the 4th end of the bridge rectifier, and the other end is connect with the electric-leakage detection circuit.
3. a kind of detection and protection apparatus for leakage with delay function according to claim 2, which is characterized in that described
It is also connected with first capacitor (C1) between one resistance (R1) and the 4th end of the bridge rectifier, the first capacitor (C1)
The other end ground connection.
4. a kind of detection and protection apparatus for leakage with delay function according to claim 1, which is characterized in that the electric leakage
Sensor circuit includes the zero sequence current mutual inductor (ZCT) being linked in sequence, second resistance (R2), bilateral diode (Q1), third electricity
Hinder (R3), the 4th resistance (R4) and the 6th capacitor (C6)；The zero sequence current mutual inductor (ZCT) leads to the leakage current sensed
It crosses the bilateral diode (Q1) to be clamped, and is filtered by the 6th power capacitor (C6), through the 3rd resistor
(R3) and after the 4th resistance (R4) conversion it is input to the electric-leakage detection circuit.
5. a kind of detection and protection apparatus for leakage with delay function according to claim 1, which is characterized in that the delay
Adjusting circuit includes the 7th capacitor (C7) and the 6th resistance (R6) being linked in sequence with the electric-leakage detection circuit, the 7th electricity
Holding (C7) is electrolytic capacitor.
6. a kind of detection and protection apparatus for leakage with delay function according to claim 1, which is characterized in that described controllable
Transwitch circuit includes reverse-blocking tetrode thyristor (SCR), the cathode of the reverse-blocking tetrode thyristor (SCR) respectively with the step-down rectifying circuit
It connects with the electric-leakage detection circuit, and is grounded by the second capacitor (C2)；The anode of the reverse-blocking tetrode thyristor (SCR) passes through the
One diode (D1) is connect with the tripping coil.
7. any detection and protection apparatus for leakage with delay function described according to claim 1-6, which is characterized in that
The electric-leakage detection circuit is electric leakage chip FM2149.
8. a kind of detection and protection apparatus for leakage with delay function according to claim 1, which is characterized in that further include surveying
Button circuit is tried, the testing button circuit and the leakage inductance answer circuit connection, the working condition for detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820990098.3U CN208272611U (en) | 2018-06-26 | 2018-06-26 | A kind of detection and protection apparatus for leakage with delay function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820990098.3U CN208272611U (en) | 2018-06-26 | 2018-06-26 | A kind of detection and protection apparatus for leakage with delay function |
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| Publication Number | Publication Date |
|---|---|
| CN208272611U true CN208272611U (en) | 2018-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820990098.3U Expired - Fee Related CN208272611U (en) | 2018-06-26 | 2018-06-26 | A kind of detection and protection apparatus for leakage with delay function |
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| Country | Link |
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| CN (1) | CN208272611U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114267561A (en) * | 2021-11-12 | 2022-04-01 | 中国电子科技集团公司第二十九研究所 | Delay circuit design method and delay circuit structure of microwave integrated circuit |
-
2018
- 2018-06-26 CN CN201820990098.3U patent/CN208272611U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114267561A (en) * | 2021-11-12 | 2022-04-01 | 中国电子科技集团公司第二十九研究所 | Delay circuit design method and delay circuit structure of microwave integrated circuit |
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| Date | Code | Title | Description |
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| 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: 20181221 |