CN208767768U - Trip circuit, trip gear, breaker - Google Patents
Trip circuit, trip gear, breaker Download PDFInfo
- Publication number
- CN208767768U CN208767768U CN201821671094.5U CN201821671094U CN208767768U CN 208767768 U CN208767768 U CN 208767768U CN 201821671094 U CN201821671094 U CN 201821671094U CN 208767768 U CN208767768 U CN 208767768U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- diode
- cathode
- anode
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 128
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 12
- 238000013461 design Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of trip circuits.The utility model is directed to the problems of the trip circuit of the existing twin-stage power supply power supply based on magnetic flow convertor, charge-discharge circuit part therein is improved, no longer share the same capacitor, but driving capacitor is respectively adopted according to the characteristics of iron core current transformer and accessory power supply output voltage and is matched, the performance requirement to single driving capacitor can thus be greatly reduced, so as to be difficult to combine high voltage and big capacitance using similar to solid capacitor is this, but there is the long-life, low ESR, the capacity cell of the advantages that small size, and then improve the reliable long-term working and service life of breaker controller.The invention also discloses a kind of trip gears and a kind of breaker.Technical solutions of the utility model are conducive to the Miniaturization Design of intelligent controller and improve the reliable long-term working of trip circuit, and meet when without accessory power supply power supply breaker protection act quick and precisely.
Description
Technical field
The utility model relates to a kind of trip circuits, belong to low-voltage distribution technical field.
Background technique
In low-voltage distribution system, intelligent circuit breaker controller is to pass through signal acquisition, number using microcontroller as core
The protection, measurement and monitoring function of breaker are realized according to processing, fault diagnosis.Trip circuit is the final stage of intelligent controller
Circuit, receives the tripping instruction that microcontroller issues, and driving magnetic flow convertor movement makes breaker disjunction.In order to ensure disconnected
Road device reliably carries out disjunction when encountering overload or short trouble, and intelligent controller generallys use twin-stage power supply power supply, i.e., by
Iron core current transformer supplies simultaneously with accessory power supply, and trip circuit is as its driving power of the pith of intelligent controller
Using twin-stage power supply.
Magnetic flow convertor is a kind of small-sized energy storage type trip gear, since the energy of permanent magnetism storage is utilized, so only needing
The power pulse of very little can make its movement, and the capacitor that the prior art generallys use larger capacitance discharges to push magnetic flux to convert
Device.Current intelligent controller trip circuit generally passes through iron core current transformer rectifier output voltage and accessory power supply voltage is defeated
Using common capacitor driving magnetic flow convertor movement after merging out.In order to balance iron core current transformer rectifier output voltage and
The working range of accessory power supply output voltage often requires that driving capacitor pressure resistance is higher and capacitance is larger, this is because: 1) covering
Iron core current transformer output voltage on breaker major loop is higher, generally limits output voltage using metal-oxide-semiconductor bleed-off circuit
At certain amplitude (generally higher than 30V), if limitation output voltage is too low, magnetic flow convertor movement is slack-off；2) accessory power supply is examined
The output voltage for considering the factor designs such as cost, versatility is lower (being generally less than equal to 24V), but in order to rapidly magnetic flux be driven to become
Parallel operation, it is desirable that driving capacitor's capacity is larger.High pressure resistant and big capacitance capacitor generally can only be using non-solid (electrolyte conduct yin
Pole material) alminium electrolytic condenser, but the working environment of breaker is more severe, is usually in high temperature, high humidity, low temperature throughout the year
Varying environment, non-solid alminium electrolytic condenser because physical characteristic and expanded by heating, service life it is shorter, and due to it is high pressure resistant and hold
The big non-solid alminium electrolytic condenser of value generally takes up that volume is larger, is unfavorable for the Miniaturization Design of intelligent controller.In addition, due to
Drive capacitor's capacity larger, when no accessory power supply is powered, such as ground fault occurs for breaker and when smaller main circuit current
When (being, for example, less than 0.4In), the charging time of driving capacitor is increased significantly, causes circuit interrupter grounding operating time of protection super
It is long, biggish threat is brought to user equipment and property safety.
Utility model content
The technical problem to be solved by the utility model is to overcome the shortage of prior art, a kind of trip circuit is provided, is dropped
The low requirement to capacitor, can be used this capacitor small in size, the service life is high of solid capacitor, is conducive to the small-sized of intelligent controller
Change design and improve the reliable long-term working of trip circuit, and meets breaker protection act when without accessory power supply power supply
Quick and precisely.
The utility model specifically uses following technical scheme to solve above-mentioned technical problem:
A kind of trip circuit, including being respectively used to higher first power supply of connection voltage and the lower second source of voltage
First power input, second source input terminal, the tripping driving circuit and the first power supply for driving magnetic flow convertor are defeated
Enter the charge-discharge circuit between end, second source input terminal and tripping driving circuit；The charge-discharge circuit includes the first~the
Five diodes, first~third capacitor；The anode of first diode is connect with the first power input, the cathode of first diode
Connect with the anode of the anode of the second diode, first capacitor, the anode of the cathode of the second diode and third diode, second
The anode connection of capacitor, the cathode of third diode are connect with the input terminal of the cathode of the 5th diode, driving circuit of threading off, the
Five diodes anode with the cathode of first capacitor, the cathode of the second capacitor, the anode of third capacitor, the 4th diode cathode
The anode of connection, the 4th diode is connect with second source input terminal, the cathode ground connection of third capacitor；First capacitor and the second electricity
The sum of capacitance of appearance is less than the capacitance of third capacitor.
A kind of trip circuit, including being respectively used to higher first power supply of connection voltage and the lower second source of voltage
First power input, second source input terminal, the tripping driving circuit and the first power supply for driving magnetic flow convertor are defeated
Enter the charge-discharge circuit between end, second source input terminal and tripping driving circuit；The charge-discharge circuit includes the first~the
Five diodes, first~third capacitor and first resistor；The anode of first diode is connect with the first power input, the
The cathode of one diode is connect with the anode of the anode of the second diode, first capacitor, the cathode of the second diode and the three or two
Cathode, the tripping driving circuit of the anode connection of the anode of pole pipe, the second capacitor, the cathode of third diode and the 5th diode
Input terminal connection, the 5th diode anode with the cathode of first capacitor, the cathode of the second capacitor, third capacitor anode,
One end of the first resistor connects, the anode of the 4th diode, cathode respectively with second source input terminal, the first resistor
The other end connection, third capacitor cathode ground connection；The sum of first capacitor and the capacitance of the second capacitor are less than third capacitor
Capacitance.
Preferably, the tripping driving circuit includes the 6th diode, second resistance, the 4th capacitor and a MOS
Pipe；The coil of the magnetic flow convertor and the 6th diodes in parallel, the cathode of the 6th diode connect the input of tripping driving circuit
End, the anode of the 6th diode connect the drain electrode of metal-oxide-semiconductor, the source electrode ground connection of metal-oxide-semiconductor, one end of the grid of metal-oxide-semiconductor and second resistance,
One end of 4th capacitor connects, another termination tripping control signal of second resistance, the other end ground connection of the 4th capacitor.
Preferably, first~third capacitor is solid capacitor.
Based on above-mentioned trip circuit, following technical scheme can also be obtained:
A kind of trip gear, including trip circuit described in magnetic flow convertor and any technical solution as above.
A kind of breaker, including above-mentioned trip gear.
Compared with prior art, the utility model has following technical effect that
1, the utility model driving power circuit is according to the characteristics of iron core current transformer and accessory power supply output voltage points
Cai Yong capacitor not driven to match, effectively reduce the requirement to capacitor, so as to use macromolecule solid capacitor, not only advised
Keep away its capacitance it is big but it is resistance to force down or high pressure resistant but low capacitance disadvantage, and make full use of its long-life, low ESR (equivalent series
Impedance) the advantages of, improve the reliable long-term working of trip circuit.
2, the driving capacitor occupancy volume used is small compared with existing non-solid alminium electrolytic condenser, is conducive to intelligent controller
Miniaturization Design.
3, when powering without accessory power supply, for example, encounter breaker occur ground fault and when smaller main circuit current (such as
Less than 0.4In) when, although iron core current transformer output energy reduces, since driving capacitor's capacity is smaller, capacitor charging
Time will not extend substantially, and breaker fast and accurately ground protection function may be implemented.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of existing trip circuit；
Fig. 2 is the circuit diagram of one specific embodiment of the utility model trip circuit；
Fig. 3 is the circuit diagram of another specific embodiment of the utility model trip circuit.
Specific embodiment
The technical solution of the utility model is described in detail with reference to the accompanying drawing:
The trip circuit of the existing twin-stage power supply power supply based on magnetic flow convertor is generally rectified by iron core current transformer
Output voltage and accessory power supply voltage output are acted after merging using common capacitor driving magnetic flow convertor.Fig. 1 is shown
Such a existing trip circuit, in the trip circuit, the main power source V1+ that is obtained from bus by current transformer and external
Accessory power supply V2+ is acted after merging using common capacitor C1 driving magnetic flow convertor.In order to balance iron core current transformer and
The working range of accessory power supply output voltage, it is desirable that driving capacitor C1 pressure resistance is higher and capacitance is larger, generally can only be using common
Non-solid alminium electrolytic condenser it is big not only take up volume, and the service life is shorter, shadow as background technology part is analyzed
The reliable long-term working of trip circuit is rung, and then influences the service life of breaker controller.
To overcome the problems, such as this, the resolving ideas of the utility model is improved to charge-discharge circuit part therein,
The same capacitor is no longer shared, but driving is respectively adopted according to the characteristics of iron core current transformer and accessory power supply output voltage
Capacitor matches, and the performance requirement to single driving capacitor can thus be greatly reduced, so as to using similar solid capacitor
It is this to be difficult to combine high voltage and big capacitance, but have many advantages, such as the long-life, low ESR, small size capacity cell, in turn
Improve the reliable long-term working and service life of breaker controller.
Fig. 2 shows the circuit of one specific embodiment of the utility model trip circuit comprising the charge and discharge being connected
Circuit 1 and tripping driving circuit 2, the charge-discharge circuit 1 from bus obtain main power source V1+ by current transformer and from external
Accessory power supply obtains accessory power supply V2+.Charge-discharge circuit 1 therein includes diode D1~D5, capacitor C1~C3 and resistance
R1；The anode of diode D1 is connect with the input terminal of main power source V1+, the cathode of diode D1 and anode, the capacitor of diode D2
The anode connection of C1, the cathode of diode D2 are connect with the anode of the anode of diode D3, capacitor C2, the cathode of diode D3 and
The input terminal connection of the cathode of diode D5, driving circuit 2 of threading off, cathode, the capacitor C2 of the anode and capacitor C1 of diode D5
Cathode, the anode of capacitor C3, resistance R1 one end connection, anode, the cathode of diode D4 be defeated with accessory power supply V2+ respectively
Enter the other end connection at end, resistance R1, the cathode ground connection of capacitor C3；Wherein, the sum of capacitor C1 and the capacitance of capacitor C2 are less than
The capacitance of capacitor C3.
Tripping driving circuit 2 in Fig. 2 is identical as the tripping driving circuit in Fig. 1 comprising diode D6, resistance R2,
Capacitor C4, metal-oxide-semiconductor VT1；As shown in Fig. 2, the coil of magnetic flow convertor L1 is in parallel with diode D6, the cathode of diode D6 connects de-
The input terminal of driving circuit is detained, the anode of diode D6 meets the drain electrode of metal-oxide-semiconductor VT1, the source electrode ground connection of metal-oxide-semiconductor VT1, metal-oxide-semiconductor VT1
Grid connect with one end of one end of resistance R2, capacitor C4, the tripping control of another termination of resistance R2 signal trip, capacitor C4
The other end ground connection.
Iron core current transformer rectifier output voltage V1+ charges through diode D1 to capacitor C1, then through diode D2 to electricity
Hold C2 charging, capacitor C1 connects with capacitor C3 again after being equivalent to parallel connection with capacitor C2.According to capacitive energy formula
(wherein C is capacitor's capacity, and U is capacitor both end voltage), it is known that under conditions of magnetic flow convertor driving energy is certain, improve electricity
Hold both ends charging voltage can substantially reduce capacitor's capacity, therefore capacitor C1, C2 in the utility model due to core current it is mutual
Sensor rectifier output voltage V1+ higher, capacitance can substantially reduce.According to real work situation, can be divided into:
1, V1+ is inputted, and when no V2+ is inputted, bears V1+, capacitor jointly after connecting after capacitor C1 is in parallel with C2 with capacitor C3
C1 and C2 bears biggish pressure drop since capacitance is smaller, and capacitor C3 bears lesser pressure drop since capacitance is larger.
2, V1+ and V2+ are inputted, and as V1+ > V2+, the pressure drop that capacitor C1 and C2 are born is approximately equal to (V1+)-(V2+),
The pressure drop that capacitor C3 is born is equal to V2+；As V1+ < V2+, since diode D1, D2, D3, D5 work in reverse-bias state,
Capacitor C1 and C2 will not apply voltage damage because of reversed, and the pressure drop that capacitor C3 is born is equal to V2+.
According to above-mentioned analysis it is found that capacitor C1, C2 only need to be adapted to current transformer rectifier output voltage V1+,
Capacitor C3 only needs to be adapted to external accessory power supply output voltage V2+, i.e., capacitor C1, C2 pressure voltage only needs to meet and be greater than
Equal to current transformer rectifier output voltage V1+, the pressure voltage of capacitor C3, which needs to meet, is more than or equal to external accessory power supply output
Voltage V2+.Therefore, C1 and C2 can select pressure-resistant higher, the lower capacitor of capacitance.When accessory power supply V2+ is powered on, pass through string
Dash current when the resistance R1 of connection can be limited to capacitor C3 charging, but the charging time of capacitor C3 can be extended in this way, but
If intelligent controller is powered using accessory power supply under normal conditions, generally powering in accessory power supply makes the normal work of intelligent controller
Ability close circuit breaker after work, therefore will not influence the protective value of breaker.Accessory power supply considers the factor designs such as cost, versatility
Output voltage it is lower (generally less than be equal to 24V), but in order to drive magnetic flow convertor enough, it is desirable that driving capacitor's capacity compared with
Greatly, i.e. C3 can select pressure-resistant lower, the biggish capacitor of capacitance.For example, capacitor C1, C2, C3 can preferentially use macromolecular solid
State capacitor, evade its capacitance it is big but it is resistance to force down or high pressure resistant but low capacitance disadvantage, make full use of its long-life, low ESR (equivalent
Series impedance) the advantages of, improve the reliable long-term working of trip circuit.Since C1, C2 are selected, pressure resistance is higher, capacitance is lower
Capacitor, C3 select pressure-resistant lower, the biggish capacitor of capacitance, and the occupancy more existing pressure resistance of volume is higher, capacitance is also higher non-solid
State alminium electrolytic condenser wants small, is conducive to the Miniaturization Design of intelligent controller.In addition, when without accessory power supply power supply, such as encounter
When (being, for example, less than 0.4In) when ground fault and smaller main circuit current occurs for breaker, although iron core current transformer exports
Energy reduces, but since driving capacitor's capacity is smaller, capacitor charging time will not extend substantially, and it is quick that breaker may be implemented
Accurate ground protection function.What tripping driving circuit 2 reception was issued from microcontroller or other analog circuits
Trip signal trip is connected metal-oxide-semiconductor VT1, then drives magnetic by the anti-interference filtration circuit of resistance R2 and capacitor C4 composition
Logical converter movement.
Fig. 3 shows another embodiment of the utility model trip circuit.The difference of the trip circuit and Fig. 2 trip circuit
Be to eliminate resistance R1, the cathode of diode D4 directly with the anode of diode D5, the cathode of capacitor C1, capacitor C2 it is negative
Pole, capacitor C3 anode be connected.The other parts and basic principle of the trip circuit are identical as Fig. 2 trip circuit, herein
It repeats no more.
Claims (8)
1. a kind of trip circuit, including being respectively used to higher first power supply of connection voltage and the lower second source of voltage the
One power input, second source input terminal, for driving the tripping driving circuit and the first power input of magnetic flow convertor
Charge-discharge circuit between end, second source input terminal and tripping driving circuit；It is characterized in that, the charge-discharge circuit includes
First~the 5th diode, first~third capacitor；The anode of first diode is connect with the first power input, the one or two pole
The cathode of pipe is connect with the anode of the anode of the second diode, first capacitor, cathode and the third diode of the second diode
The input of the cathode, driving circuit of threading off of the anode connection of anode, the second capacitor, the cathode of third diode and the 5th diode
End connection, anode and the cathode of first capacitor, the cathode of the second capacitor, the anode of third capacitor, the four or two of the 5th diode
The cathode of pole pipe connects, and the anode of the 4th diode is connect with second source input terminal, the cathode ground connection of third capacitor；First electricity
The sum of appearance and the capacitance of the second capacitor are less than the capacitance of third capacitor.
2. trip circuit as described in claim 1, which is characterized in that the tripping driving circuit includes the 6th diode, second
Resistance, the 4th capacitor and a metal-oxide-semiconductor；The coil of the magnetic flow convertor and the 6th diodes in parallel, the 6th diode
Cathode connects the input terminal of tripping driving circuit, and the anode of the 6th diode meets the drain electrode of metal-oxide-semiconductor, the source electrode ground connection of metal-oxide-semiconductor, MOS
One end connection of one end, the 4th capacitor of the grid and second resistance of pipe, another termination tripping control signal of second resistance, the
The other end of four capacitors is grounded.
3. trip circuit as described in claim 1, which is characterized in that first~third capacitor is solid capacitor.
4. a kind of trip circuit, including being respectively used to higher first power supply of connection voltage and the lower second source of voltage the
One power input, second source input terminal, for driving the tripping driving circuit and the first power input of magnetic flow convertor
Charge-discharge circuit between end, second source input terminal and tripping driving circuit；It is characterized in that, the charge-discharge circuit includes
First~the 5th diode, first~third capacitor and first resistor；Anode and the first power input of first diode
Connection, the cathode of first diode and the anode of the second diode, first capacitor anode connect, the cathode of the second diode and
The anode connection of the anode of third diode, the second capacitor, the cathode of third diode and the cathode of the 5th diode, tripping are driven
The input terminal connection of dynamic circuit, the anode of the 5th diode and the cathode of first capacitor, the cathode of the second capacitor, third capacitor
One end of positive, the described first resistor connects, the anode of the 4th diode, cathode respectively with second source input terminal, described the
The other end of one resistance connects, the cathode ground connection of third capacitor；The sum of first capacitor and the capacitance of the second capacitor are less than third
The capacitance of capacitor.
5. trip circuit as claimed in claim 4, which is characterized in that the tripping driving circuit includes the 6th diode, second
Resistance, the 4th capacitor and a metal-oxide-semiconductor；The coil of the magnetic flow convertor and the 6th diodes in parallel, the 6th diode
Cathode connects the input terminal of tripping driving circuit, and the anode of the 6th diode meets the drain electrode of metal-oxide-semiconductor, the source electrode ground connection of metal-oxide-semiconductor, MOS
One end connection of one end, the 4th capacitor of the grid and second resistance of pipe, another termination tripping control signal of second resistance, the
The other end of four capacitors is grounded.
6. trip circuit as claimed in claim 4, which is characterized in that first~third capacitor is solid capacitor.
7. a kind of trip gear, including magnetic flow convertor and the trip circuit as described in any one of claim 1~6.
8. a kind of breaker, including trip gear as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821671094.5U CN208767768U (en) | 2018-10-16 | 2018-10-16 | Trip circuit, trip gear, breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821671094.5U CN208767768U (en) | 2018-10-16 | 2018-10-16 | Trip circuit, trip gear, breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208767768U true CN208767768U (en) | 2019-04-19 |
Family
ID=66136522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821671094.5U Withdrawn - After Issue CN208767768U (en) | 2018-10-16 | 2018-10-16 | Trip circuit, trip gear, breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208767768U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
-
2018
- 2018-10-16 CN CN201821671094.5U patent/CN208767768U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245025A (en) * | 2018-10-16 | 2019-01-18 | 常熟开关制造有限公司(原常熟开关厂） | Trip circuit, trip gear, breaker |
| CN109245025B (en) * | 2018-10-16 | 2024-05-10 | 常熟开关制造有限公司(原常熟开关厂） | Tripping circuit, tripping device and circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201185355Y (en) | High voltage line induction electricity-taking apparatus | |
| CN105372480A (en) | Over voltage, under voltage and phase failure detection circuit for charging pile | |
| CN202206195U (en) | Power source for power cable grounding circulation monitoring device | |
| CN109412117A (en) | A kind of protection circuit against input over-voltage | |
| CN206850530U (en) | A kind of high voltage induction electricity getting device of doubleway output | |
| CN108206517A (en) | A kind of low cost inputs anti-overvoltage crowbar | |
| CN104269898B (en) | Charging unit of super capacitor | |
| CN114865760A (en) | Induction power supply based on non-closed magnetic core and power supply method thereof | |
| CN208767768U (en) | Trip circuit, trip gear, breaker | |
| CN101982921B (en) | Universal high-voltage capacitor energy storage module | |
| CN208158141U (en) | A kind of high-tension line PT electricity getting device | |
| CN109245025A (en) | Trip circuit, trip gear, breaker | |
| CN105356564A (en) | Wireless energy receiving system | |
| CN202997539U (en) | A super capacitor voltage balance protection circuit | |
| CN101064429A (en) | Burst current suppressing circuit and power supply equipment using the same | |
| CN104577968A (en) | Three-phase overvoltage, under-voltage and default phase integrated protection circuit | |
| CN209375223U (en) | Power down delay circuit | |
| CN206740851U (en) | A kind of resonance power taking for being embedded in switch and residual voltage measuring system | |
| CN106207963A (en) | The under-voltage phase-lacking protective device of electromagnetism voltage-stabilizing energy-saving device | |
| CN103475074B (en) | Unloaded low-loss battery charger | |
| CN207399162U (en) | Intelligent switch | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN213402578U (en) | Induction electricity taking circuit and passive wireless temperature measuring device based on same | |
| CN107666305A (en) | Intelligent switch | |
| CN204441852U (en) | A kind of three-phase overvoltage, under-voltage, phase shortage integrated protective circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190419 Effective date of abandoning: 20240510 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190419 Effective date of abandoning: 20240510 |